Article
Computer Science, Artificial Intelligence
Mingyang Zhang, Hanhong Zheng, Maoguo Gong, Yue Wu, Hao Li, Xiangming Jiang
Summary: This study proposes a self-structured pyramid network (S2PNet) with a parallel spatial-channel attention mechanism (PSAM) and a self-structured feature pyramid (SFP) for finer annotation of changed land cover in very-high-resolution (VHR) images. Experimental results demonstrate the efficiency and effectiveness of the proposed method on widely used VHR CD datasets, and show that it outperforms several existing state-of-the-art CD methods.
PATTERN RECOGNITION
(2023)
Article
Geography, Physical
Lei Deng, Jie Sun, Yong Chen, Han Lu, Fuzhou Duan, Lin Zhu, Tianxing Fan
Summary: In this study, a more suitable multispectral to hyperspectral network (M2H-Net) is proposed for remote sensing applications, which can efficiently reconstruct hyperspectral images within a wider spectral range. It demonstrates high accuracy and stability in image reconstruction.
ISPRS JOURNAL OF PHOTOGRAMMETRY AND REMOTE SENSING
(2021)
Article
Computer Science, Software Engineering
Nikolaos Anastasopoulos, Ioannis G. Tsoulos, Alexandros Tzallas
Summary: A genetic programming tool based on Grammatical Evolution technique is proposed for data classification, utilizing multicore computing systems with the OpenMP library. It generates simple rules in a C-like programming language, and allows for user-defined BNF grammar, showing very promising results in a wide range of classification problems when compared to traditional techniques.
Article
Engineering, Electrical & Electronic
Zhuang Zhou, Shengyang Li, Wei Wu, Weilong Guo, Xuan Li, Guisong Xia, Zifei Zhao
Summary: This article introduces a large-scale dataset NaSC-TG2 built from Tiangong-2 remotely sensed imagery, which aims to expand and enrich annotated data for advancing remote sensing classification algorithms, especially for natural scene classification. The dataset contains 20,000 images equally divided into ten scene classes, with the advantages of large scale, intra-class differences, and inter-class similarity.
IEEE JOURNAL OF SELECTED TOPICS IN APPLIED EARTH OBSERVATIONS AND REMOTE SENSING
(2021)
Article
Geochemistry & Geophysics
Zhen Shu, Xiangyun Hu, Hengming Dai, Lunhao Duan, Zhili Zhang, Lin Zhang, Litong Zhang
Summary: This article presents an algorithm for directly extracting simplified polygons of buildings in remotely sensed images. The algorithm encodes the polygon structure and recovers it using a nonrecurrent manner. Corner points and connecting points are used to generate the final polygon. Additionally, a bidirectional tracing strategy is proposed for polygon structure recovery. Experimental results demonstrate the superiority of the algorithm.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2023)
Article
Geosciences, Multidisciplinary
Ali Darvishi Boloorani, Najmeh Neysani Samany, Ramin Papi, Masoud Soleimani
Summary: The study developed an applicable, robust, and generalizable approach by integrating machine learning classifiers into dust source susceptibility mapping in the Tigris-Euphrates river basin. The final accurate susceptible dust sources map was obtained, providing important reference data for research purposes.
Article
Geochemistry & Geophysics
Qing Zhu, Cheng Liao, Han Hu, Xiaoming Mei, Haifeng Li
Summary: Building footprint extraction is a fundamental task in various fields such as mapping and computer vision, but current CNN-based methods struggle with detecting tiny buildings and inaccurate segmentation of large buildings. Recent research has introduced multiscale strategies and a novel neural network structure to improve the efficiency and accuracy of building footprint extraction.
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
(2021)
Article
Biotechnology & Applied Microbiology
Muhammad Awais, Wei Li, Muhammad Jehanzeb Masud Cheema, Shahid Hussain, Tahani Saad AlGarni, Chenchen Liu, Asad Ali
Summary: This study utilized UAV with RGB and thermal imaging to detect canopy temperature of plants and found that the extracted results were closely related to ground truth measurements. The research results demonstrate that this method can reliably estimate the temperature around plants and provide accurate, rapid, and reliable canopy temperature quantification.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Engineering, Electrical & Electronic
Zebin Wu, Jin Sun, Yi Zhang, Zhihui Wei, Jocelyn Chanussot
Summary: This article surveys the state-of-the-art methods for processing remotely sensed big data and thoroughly investigates existing parallel implementations. The study shows that cloud computing is the most promising solution for efficient and scalable processing of remotely sensed big data, with scheduling strategies being crucial for fully exploiting parallelism.
PROCEEDINGS OF THE IEEE
(2021)
Article
Optics
Quinten Vanhellemont
Summary: The Planet's SuperDove constellation is assessed for remote sensing water targets. SuperDoves consist of small satellites equipped with eight-band PlanetScope imagers, which offer four additional bands compared to previous generations of Doves. In aquatic applications, the Yellow (612 nm) and Red Edge (707 nm) bands are particularly useful for the retrieval of pigment absorption. The study evaluates the performance of the dark spectrum fitting (DSF) algorithm implemented in ACOLITE for processing SuperDove data, and compares it with matchup data collected using a pan-and-tilt hyperspectral radiometer (PANTHYR) in the Belgian Coastal Zone (BCZ). The results show low differences between DSF and PANTHYR observations for the first seven bands, with some positive or negative biases identified in certain bands.
Article
Geosciences, Multidisciplinary
Evan Greenberg, Austin J. Chadwick, Vamsi Ganti
Summary: Rivers are important conduits for water and sediment, but they are being increasingly affected by climate change and human activities. The availability of global satellite imagery provides a powerful way to study river mobility and understand the impacts of these changes. However, there is a lack of remote sensing methods that can be applied to different types of rivers.
JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE
(2023)
Article
Agriculture, Multidisciplinary
Daniele De Rosa, Bruno Basso, Matteo Fasiolo, Johannes Friedl, Bill Fulkerson, Peter R. Grace, David W. Rowlings
Summary: By combining remote sensing imagery, statistical models, and machine learning algorithms, accurate predictions of future pasture biomass can be made using observations of pasture growth and other variables. Including high spatial resolution post-grazing biomass variables can improve the predictive performance of the models.
COMPUTERS AND ELECTRONICS IN AGRICULTURE
(2021)
Article
Agronomy
Christopher Y. S. Wong, Lina M. Mercado, M. Altaf Arain, Ingo Ensminger
Summary: This study demonstrates the importance of using PRI and CCI indices to improve the remote monitoring of forest vegetation phenology, showing less variability than traditional meteorological models in estimating the start and end of the growing season.
AGRICULTURAL AND FOREST METEOROLOGY
(2022)
Article
Environmental Sciences
Marcelle Lock, Neil Saintilan, Iris van Duren, Andrew Skidmore
Summary: The Australian New South Wales Estuary health assessment and biodiversity monitoring program has set state-wide targets for estuary health. In this study, the use of remote sensing derived data for monitoring water quality indicators in selected lakes along the coast was investigated. The results showed that the remote sensing products were partly successful in predicting chlorophyll a concentration and water clarity, but varied across years and lakes. It is likely that the physical differences between the systems influence the algorithm's output, suggesting the need for a tailored monitoring approach.
Article
Agriculture, Multidisciplinary
Jacopo Furlanetto, Nicola Dal Ferro, Matteo Longo, Luigi Sartori, Riccardo Polese, Daniele Caceffo, Lorenzo Nicoli, Francesco Morari
Summary: This study applied a parametric method based on unmanned aerial vehicles (UAV) and Sentinel-2 sensors to estimate the leaf area index (LAI) of maize (Zea mays L.) under damaged canopy conditions. The results showed that both sensors accurately estimated LAI, and the parametric method matched the LAI values generated from the Sentinel-2 biophysical processor.
PRECISION AGRICULTURE
(2023)
Article
Environmental Sciences
Weiqiang Zhao, Hongyan Bao, Dekun Huang, Jutta Niggemann, Thorsten Dittmar, Shuh-Ji Kao
Summary: The study conducted sampling and dissolved organic matter (DOM) mixing experiments in the Jiulong River estuary (JRE) and found that deposition inputs from soil and atmospheric deposition play a role in estuarine dissolved black carbon (DBC). The composition and concentration of DBC were primarily controlled by mixing, but photodegradation and particle adsorption/flocculation may also contribute to its removal.
Article
Limnology
Rediat Abate, Buce Hanoch Hetharua, Vishal Patil, Daner Lin, Demeke Kifle, Junrong Liang, Changping Chen, Lin Sun, Shuh-Ji Kao, Yonghong Bi, Bangqin Huang, Yahui Gao
Summary: The study investigates the response of phytoplankton and its satellite bacteria to different concentrations of ethanol. It found that low concentrations of ethanol promote growth, while high concentrations inhibit growth. Further analysis revealed that ethanol stimulates bacterial growth by serving as a growth stimulant rather than a carbon source.
JOURNAL OF OCEANOLOGY AND LIMNOLOGY
(2023)
Article
Environmental Sciences
Yu-Xiao Li, Shu-Han Liu, Li Luo, Shu-Di Yang, Bin-Yu Lu, Chen Wang, Shih-Chieh Hsu, Shuh-Ji Kao
Summary: A total of 172 TSP samples and their chemical compositions were collected and analyzed from Pengjia Yu Island in the East China Sea in 2010. The presence of non-sea-salt SO42- and NO3- as well as combustion-derived trace metals indicates the impact of anthropogenic sources. Coal, heavy-fuel oil, and traffic were found to contribute significantly to the measured chemical species. Dust periods had higher contributions of crustal minerals compared to non-dust periods. Atmospheric deposition was identified as an important source of nutrient elements for the south of the East China Sea.
MARINE POLLUTION BULLETIN
(2023)
Article
Geosciences, Multidisciplinary
Xianhui S. S. Wan, Hua-Xia Sheng, Minhan Dai, Karen L. L. Casciotti, Matthew J. J. Church, Wenbin Zou, Li Liu, Hui Shen, Kuanbo Zhou, Bess B. B. Ward, Shuh-Ji Kao
Summary: The removal of carbon dioxide from the atmosphere by the marine biological pump is counteracted by the production of nitrous oxide in the subtropical ocean, which weakens the radiative benefit of carbon removal. Nitrous oxide production is promoted by enhanced biological activity, leading to substantial emissions that offset part of the greenhouse warming mitigation achieved by the biological pump.
Article
Environmental Sciences
Hongyan Bao, Ying Wu, Xiaoqian Zhan, Xiaona Wang, Robert G. M. Spencer, Peter J. J. Hernes, Xiaojuan Feng, Li-Chin Lee, Jr-Chuan Huang, Jingjing Zhang, Hongwei Zhao, Shuh-Ji Kao, Jing Zhang
Summary: The concentrations of dissolved lignin and dissolved organic carbon (DOC) were positively correlated globally, and were influenced by water discharge, mean basin slope, and forest coverage. The estimated global flux of dissolved lignin ranged from 0.58 to 1.2 Tg yr(-1), suggesting a significant impact of future land-cover changes on the land-to-ocean export of dissolved organic matter.
GLOBAL BIOGEOCHEMICAL CYCLES
(2023)
Article
Geosciences, Multidisciplinary
Li Luo, Tingting Liao, Xiaoling Zhang, Yunfei Wu, Jiawei Li, Renjian Zhang, Zhenzhen Zheng, Shuh-Ji Kao
Summary: By coupling nitrate dual isotopes with aerosol chemical compositions, this study investigated the size-segregated formation mechanisms of nitrate (NO3-) during winter haze pollution events in Chengdu, China. Different formation pathways were identified for fine particles and coarse particles, with N2O5 hydrolysis, NO3 + VOCs, and NO2 + OH homogeneous reactions being major contributors for fine particle NO3- production, and the reaction between gas-phase HNO3 and CaCO3 dominating coarse particle NO3- formation. This research provides quantitative insights and a better understanding of NO3- formation during haze pollution.
Review
Geochemistry & Geophysics
Minhan Dai, Ya-Wei Luo, Eric P. Achterberg, Thomas J. Browning, Yihua Cai, Zhimian Cao, Fei Chai, Bingzhang Chen, Matthew J. Church, Dongjian Ci, Chuanjun Du, Kunshan Gao, Xianghui Guo, Zhendong Hu, Shuh-Ji Kao, Edward A. Laws, Zhongping Lee, Hongyang Lin, Qian Liu, Xin Liu, Weicheng Luo, Feifei Meng, Shaoling Shang, Dalin Shi, Hiroaki Saito, Luping Song, Xianhui Sean Wan, Yuntao Wang, Wei-Lei Wang, Zuozhu Wen, Peng Xiu, Jing Zhang, Ruifeng Zhang, Kuanbo Zhou
Summary: Subtropical gyres cover a significant portion of the world's ocean and are typically considered as ocean deserts due to their permanent stratification, depleted surface nutrients, and low biological productivity. Despite advancements in understanding biogeochemistry, subtropical gyres remain understudied. This review focuses on the North Pacific Subtropical Gyre and compares it with other subtropical gyres. It highlights the spatial variability and its impact on community structure and export production. The review also identifies knowledge gaps and research challenges in these unique systems that warrant future studies.
REVIEWS OF GEOPHYSICS
(2023)
Article
Environmental Sciences
Li Luo, Siqi Wu, Renjian Zhang, Yunfei Wu, Jiawei Li, Shuh-ji Kao
Summary: The isotopic fractionation among NOy species can affect the evaluation of NOx sources. This study integrated aerosol 815N-NO3- data and fNO2 ratios to investigate the nitrogen isotope fractionation factors (As) in the Beijing-Tianjin-Hebei region from 2013 to 2018. The results showed significant seasonal patterns in both aerosol 815N-NO3- and As, emphasizing the importance of considering As when using atmospheric 815N-NO3- to quantify NOx source allocation.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Hongyan Bao, Jing Qiao, Dekun Huang, Jutta Niggemann, Yuanbi Yi, Weiqiang Zhao, Silin Ni, Thorsten Dittmar, Shuh-Ji Kao
Summary: The biolability of rainwater dissolved organic matter (DOM) at the molecular level has been examined for the first time in this study. Results showed that approximately 50% of rainwater DOC and around 90% of formic acid (FA) and acetic acid (AA) were bioconsumed within 28 days. Additionally, our findings revealed the quantitative and qualitative understanding of the bioavailability of rainwater DOM, which is crucial for comprehending their impact on biogeochemical cycles and environmental health in receiving waters.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Jingjing Zhang, Zanhui Huang, Yuanchao Li, Dinghui Fu, Qipei Li, Lixin Pei, Yanwei Song, Liang Chen, Hongwei Zhao, Shuh-Ji Kao
Summary: Human-induced nitrogen enrichment, combined with ocean warming, increases the pressure on coral reefs. This study investigated the changes in fatty acid biosynthesis pathways and translocation mechanisms in coral hosts and Symbiodiniaceae under heat stress and nitrogen enrichment. The results revealed that heat stress promoted pro-inflammatory fatty acid biosynthesis in coral hosts and inhibited it in Symbiodiniaceae. Nitrate enrichment inhibited anti-inflammatory fatty acid biosynthesis in Symbiodiniaceae, while ammonium enrichment promoted it. These findings provide insights into the mechanisms of coral bleaching under environmental stress, from a fatty acid perspective.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Li-Li Han, Helin Wang, Lianghao Ge, Min Nina Xu, Jin-Ming Tang, Li Luo, Ping Li, Shuh-Ji Kao
Summary: Ammonium (NH4+) retention/removal processes in groundwater are important due to human activities increasing nitrogenous compound loading. However, the transformation processes determining NH4+ fate in groundwater under different redox conditions have not been well studied. In a high nitrogen groundwater system in China, NH4+ source and sink processes were identified and quantified, revealing the dominance of mineralization and nitrification in oxidizing zones, and anammox in reducing zones. The NH4+ production/consumption ratio increased downstream, indicating NH4+ accumulation in strongly reducing groundwater where aerobic conditions are lacking. These findings provide insights for understanding NH4+ dynamics and suggest mitigation techniques for groundwater NH4+.
Article
Microbiology
Zhaolong Nie, Kaihao Tang, Weiquan Wang, Pengxia Wang, Yunxue Guo, Yan Wang, Shuh-Ji Kao, Jianping Yin, Xiaoxue Wang
Summary: In this study, three genomes of Prosthecochloris were obtained from coral skeletons, and it was found that these genomes have specialized metabolic capacities and oxygen tolerance to adapt to coral skeleton microenvironments. The presence of mobile genetic elements was also discovered, indicating their role in the evolutionary diversity of Prosthecochloris strains.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Meteorology & Atmospheric Sciences
Ruoyang Zhang, Jing Qiao, Dekun Huang, Xihuang Lin, Li Tian, Baiyun Wang, Hongyan Bao, Shuh-Ji Kao
Summary: Aerosols are an important source of dissolved black carbon (DBC) in the ocean, and the impact of anthropogenic activities on the seasonal variations of aerosol DBC concentration and condensation degree remains unclear. In this study, we collected 33 aerosol samples from a coastal site in China and analyzed the concentrations of DBC, water-soluble organic carbon (WSOC), and elemental carbon (EC). Our results showed that DBC concentrations were higher in spring and winter, influenced by sources, rainfall frequency, and secondary processes. The dominant source of DBC was fossil fuel (FF) burning, with enhanced contribution from biomass burning brought by East Asian Monsoon.
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
(2023)
Article
Engineering, Environmental
Xiaoxi Sun, Ehui Tan, Beichen Wang, Zixuan Gan, Jian Yang, Jibin Han, Xiying Zhang, Shuh-ji Kao, Gary King, Hailiang Dong, Hongchen Jiang
Summary: Current estimations of nitrogen biogeochemical cycling and N2O emissions in global lakes primarily focus on freshwater datasets, while saline lakes with salinization or desalinization have been given less consideration. This study reveals that N2O production through denitrification is the main process for reactive nitrogen removal in hypersaline lake sediments. Field measurements and literature data indicate that decreasing salinity leads to increased potential nitrogen removal and decreased N2O production. Furthermore, the salinity sensitivity of denitrification-induced N2 production is higher than that of denitrification-induced N2O production, suggesting a reduced contribution of N2O to nitrogen removal with decreasing salinity. Therefore, salinity change should be considered as an important factor in assessing future trends of N2O emissions from lakes under climate change.
Article
Oceanography
Zhongwei Yuan, Thomas J. Browning, Chuanjun Du, Hui Shen, Lei Wang, Yifan Ma, Zong-Pei Jiang, Zhiyu Liu, Kuanbo Zhou, Shuh-Ji Kao, Minhan Dai
Summary: This study investigates the spatial variability, temporal evolution, and impact of mesoscale eddies on upper ocean biogeochemistry in the subtropical Northwest Pacific. The results show that the upper layer of the eddy has lower phosphate concentrations within its core, which can be attributed to elevated N-2 fixation driven by enhanced subsurface iron supply. The presence of eddies affects the phytoplankton biomass in the lower euphotic zone but does not significantly impact the total phytoplankton biomass across the entire euphotic zone. With an anticipated increase in the frequency of cyclonic eddies in the subtropical North Pacific, their role in regulating nutrient biogeochemistry and productivity of the region may become more important.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2023)
Article
Engineering, Environmental
Rong-Gui Zhu, Chang-Gui Pan, Feng-Jiao Peng, Chao-Yang Zhou, Jun-Jie Hu, Kefu Yu
Summary: This comprehensive survey investigated the occurrence, bioaccumulation, and trophic magnification of parabens and their metabolite 4-HB in a marine food web. Results showed that parabens were the predominant pollutants in marine organisms, with significant bioaccumulation from sediments. The estimated trophic magnification factor indicated biomagnification for MeP and trophic dilution for 4-HB. Overall, the risks for humans consuming marine organisms were found to be low.
Article
Engineering, Environmental
Andres F. Torres-Franco, Deborah Leroy-Freitas, Cristina Martinez-Fraile, Elisa Rodriguez, Pedro A. Garcia-Encina, Raul Munoz
Summary: Anaerobic and microalgae-based technologies have emerged as sustainable alternatives for municipal wastewater treatment. However, the presence of viruses in the treated wastewater is a major concern for reuse applications. This study assessed the ability of these technologies to reduce viruses during secondary wastewater treatment. The results showed that all technologies were effective in reducing the concentration of viruses, with microalgae-based treatment exhibiting the highest potential for reducing the disinfection requirements of treated wastewater.
Article
Engineering, Environmental
Young Gwang Kim, Sae Yun Kwon, Spencer J. Washburn, Scott C. Brooks, Ji Won Yoon, Lucien Besnard
Summary: The study uses Hg isotope ratios to identify the sources and exposure pathways of mercury in bivalves, finding that dissolved Hg phases in the water column are the primary source and exposure pathway to bivalves. This provides new insights into using bivalves as bioindicators for sediment quality monitoring.
Article
Engineering, Environmental
Hui Geng, Ying Xu, Rui Liu, Dianhai Yang, Xiaohu Dai
Summary: This study investigates the effect of cation exchange resin (CER) on the sequential recovery of hydrogen and methane from anaerobic digestion (AD) and the corresponding mechanisms. The results show that CER can simultaneously enhance the production of hydrogen and methane by promoting the solubilisation, hydrolysis, and acidification of organic matter. Additionally, CER facilitates effective contact between bacteria and organic particulates and reduces the energy barrier for mass transfer during methane production. The study also reveals changes in the microbial community structure and metagenomics during the AD process.
Article
Engineering, Environmental
Xiaojing Lin, Zhan Jin, Shunfeng Jiang, Zhiquan Wang, Suqing Wu, Ke Bei, Min Zhao, Xiangyong Zheng
Summary: Dehumidification combined with addition of absorbent resin supplement (ARS) was used to achieve rapid evaporation of non-pretreated urine, resulting in high water evaporation efficiency and nutrient recovery.
Article
Engineering, Environmental
Yangli Che, Chaoran Lin, Shen Li, Jiao Liu, Longhai Zhu, Shilei Yu, Nan Wang, Haoshuai Li, Mutai Bao, Yang Zhou, Tonghao Si, Rui Bao
Summary: Hydrodynamic processes play a crucial role in the transmission of sediments, microbial assembly, and organic carbon redistribution in the ocean. Through experiments and analysis, we found that hydrodynamics shape the assembly of microbial communities and control the redistribution of different sourced organic carbon, thereby influencing microbial-mediated biogeochemical transformation.
Article
Engineering, Environmental
Chao Chen, Yu Yang, Nigel J. D. Graham, Zhenyu Li, Xingtao Yang, Zhining Wang, Nadia Farhat, Johannes S. Vrouwenvelder, Li -an Hou
Summary: The fouling of seawater reverse osmosis membranes is a persistent challenge in desalination. This study monitored the operational performance of a desalination plant for 7 years and the fouling development in different areas of membrane modules. The findings showed that operational performance declined over time and fouling mainly occurred at the feed side of the modules, with the highest microbial diversity. Keystone species like Chloroflexi and Planctomycetes played an important role in maintaining community structure and biofilm maturation. Polysaccharides, soluble microbial products, marine humic acid-like substances, and inorganic substances contributed to fouling. Overall, biofouling had a significant impact on membrane fouling after 7 years of operation.
Article
Engineering, Environmental
Dan Li, Jieyi Sun, Yibo Fu, Wentao Hong, Heli Wang, Qian Yang, Junhong Wu, Sen Yang, Jianhui Xu, Yunfei Zhang, Yirong Deng, Yin Zhong, Ping'an Peng
Summary: Sulfidation-oxidation treatment of magnetite (Fe3O4) enhances the production of dark center dot OH, which can efficiently degrade dissolved organic matter (DOM) and accelerate carbon cycling.
Article
Engineering, Environmental
Cheng Yu, Kaijun Wang, Kaiyuan Zhang, Ruiyang Liu, Pingping Zheng
Summary: This study implemented a microaerobic-aerobic configuration in a full-scale municipal wastewater treatment facility and investigated the effects on sludge characteristics, pollutant removal, microbial community, and granulation mechanisms. The results showed successful transition from flocculent-activated sludge to well-defined AGS after two months of operation. The primary pathways for pollutant removal were simultaneous nitrification, denitrification, and phosphorus removal. Moreover, the incorporation of internal separators induced shifts in the flow pattern, which promoted granulation.
Article
Engineering, Environmental
Zhe Zhang, Shaoyang Hu, Guangrong Sun, Wei Wang
Summary: Halogenated aromatic disinfection byproducts (DBPs), such as halogenated phenols, have garnered widespread attention due to their high toxicity and prevalence. This study reports on the analysis, occurrence, and cytotoxicity of a group of emerging halogenated aromatic DBPs, known as halogenated polyhydroxyphenols (HPPs), in drinking water.
Article
Engineering, Environmental
Shengyue Chen, Jinliang Huang, Peng Wang, Xi Tang, Zhenyu Zhang
Summary: Accurate prediction of river water quality is crucial for sustainable water management. This study introduces wavelet analysis and transfer learning techniques to assist LSTM modeling, proposing a newly coupled modeling approach that improves short-term prediction of river water quality.
Article
Engineering, Environmental
Bang Du, Xinmin Zhan, Piet N. L. Lens, Yifeng Zhang, Guangxue Wu
Summary: Efficient anaerobic digestion relies on the cooperation of different microorganisms with different metabolic pathways. This study investigated the effects of different operational modes and the addition of powdered activated carbon (PAC) on ethanol metabolic pathways. The results showed that the SBR mode and the presence of CO2 facilitated ethanol metabolism towards propionate production, while the CFR mode with extended solids retention time enriched Geobacter. Adjusting operational modes and PAC addition can modulate anaerobic ethanol metabolism and enrich Geobacter.
Article
Engineering, Environmental
Wanfa Wang, Si-Liang Li, Jun Zhong, Yuanbi Yi, Fujun Yue, Zenglei Han, Qixin Wu, Ding He, Cong-Qiang Liu
Summary: This study compares the carbon biogeochemical processes in karst and non-karst regions within large thermal stratified river-reservoir systems. The results demonstrate that karst reservoirs have a reduced potential for carbon emissions and highlight the importance of considering geologic settings to improve accuracy in regional and global CO2 emission estimates.
Article
Engineering, Environmental
Chunxia Jiang, Zelong Zhao, Dong Zhu, Xiong Pan, Yuyi Yang
Summary: This study analyzed the occurrence and distribution of antibiotic resistance genes (ARGs) in different environmental media of the Yangtze River using metagenomics. Core resistome dominated by multidrug resistance genes was found in all samples, while rare resistome dominated by various resistance genes was more prevalent in plasmids. Specific bacteria were identified as hosts for both core and rare resistomes, with high clinical concern ARGs found in the rare resistome. Particle-associated environment provided the most ideal conditions for resistome hosts. This study provided insights into the genetic locations of ARGs and the community assembly mechanisms of ARG hosts in freshwater environments.
Article
Engineering, Environmental
Yu Zhang, Yongtao He, Linchun Jia, Lei Xu, Zheng Wang, Yueling He, Ling Xiong, Xumeng Lin, Hong Chen, Gang Xue
Summary: By synergizing organic carbon source, thiosulfate, and zero-valent iron, efficient mixotrophic denitrification of oligotrophic secondary effluent can be achieved. Thiosulfate plays a vital role in promoting TN removal efficiency, while corrosion of Fe0 releases OH- to neutralize H+ from thiosulfate-driven denitrification, creating a suitable environment for denitrification. The coordination of thiosulfate and Fe0 maintains the dominance of Thiobacillus for denitrification.
