Article
Plant Sciences
Shuai Tong, Johan Emil Kjaer, Lucas Leon Peralta Ogorek, Elisa Pellegrini, Zhiwei Song, Ole Pedersen, Max Herzog
Summary: Excess water can cause flooding stress and yield loss in wetland crops like rice. However, traits from wild Oryza species have been used to improve stress tolerance in cultivated rice. This study investigated the response of root traits to sudden soil flooding in several wild rice species and cultivated rice genotypes. The results showed that different species exhibited varying levels of plasticity in root traits, indicating strong anatomical and physiological responses to soil flooding.
JOURNAL OF EXPERIMENTAL BOTANY
(2023)
Article
Environmental Sciences
Yulu Wei, Chaokun Li, Liu Han, Hui Xi, Yinqiang Tian, Kanfolo Franck Herve Yeo, Wendong Wang
Summary: The growth status, root exudates, radial oxygen loss, and sewage purification effect of plants acclimated with sewage and cultured with a nutrient solution were studied. The results showed that Acorus gramineus Aiton had the highest root oxygen secretion rate, followed by Pistia stratiotes L., and Eichhornia crassipes (Mart.) Solms had the lowest rate. After adaptation, plants showed strong removal effects on COD, NH3-N, TN, and TP. Acorus gramineus Aiton achieved better remediation of polluted water bodies.
Article
Environmental Sciences
Cai Li, Shiming Ding, Xin Ma, Musong Chen, Zhilin Zhong, Yi Zhang, Mingyi Ren, Min Zhang, Liyuan Yang, Nan Rong, Yan Wang
Summary: Root-triggered microscale variations in O-2 distribution in the rhizosphere of young Phragmites australis play a significant role in nutrient removal in sediments. The distribution of root O-2 leakage is highly variable depending on root growth stage, with oxygen concentration increasing in the rhizosphere with higher light intensity and O-2 levels in water. Continuous O-2 release from lateral roots leads to the formation of iron plaque, reducing phosphorus mobility, while oxic-anoxic root zones oscillation improves nitrogen removal processes.
ENVIRONMENTAL POLLUTION
(2021)
Article
Agricultural Engineering
Qionghua Zhang, Junnan Huang, Mawuli Dzakpasu, Zan Gao, Weidong Zhou, Ruiting Zhu, Jiaqing Xiong
Summary: This study investigates the seasonal variation in radial oxygen loss (ROL) and its effects on COD and NH4+-N removal in bidirectional cross flow wetlands with different plant species. The results show that ROL is significantly influenced by season, with Arundo donax var.versicolor exhibiting the highest ROL. Furthermore, ROL is strongly correlated with various root properties and the removal efficiency of COD and NH4+-N. High-throughput sequencing analysis reveals that Proteobacteria is the dominant rhizospheric phylum, with higher abundance of Alpha- and Gamma-Proteobacteria in Arundo donax var.versicolor samples due to its higher oxygen transport capacity.
BIORESOURCE TECHNOLOGY
(2022)
Article
Plant Sciences
Rhuanito Soranz Ferrarezi, Xiongjie Lin, Andres C. Gonzalez Neira, Flavia Tabay Zambon, Hanqing Hu, Xianda Wang, Jing-Hao Huang, Guocheng Fan
Summary: The substrate pH directly affects nutrient availability in the rhizosphere and nutrient uptake by plants. Different pH levels can significantly impact plant growth, nutrient balance, and rhizosphere microbiota composition. Low pH can enhance nutrient uptake and improve plant health.
FRONTIERS IN PLANT SCIENCE
(2022)
Article
Environmental Sciences
Samantha C. Nyer, Nils Volkenborn, Robert C. Aller, Molly Graffam, Qingzhi Zhu, Roy E. Price
Summary: Constructed wetlands have been widely used for domestic wastewater treatment, but the complex biogeochemical processes occurring within them, particularly regarding plant-soil (and nitrogen) interactions, are not well understood. This study used nitrogen porewater measurements and chemical imaging to investigate the impact of plants on soil redox dynamics and nitrogen biogeochemical cycling in constructed wetlands. The findings revealed that plant roots transported oxygen to anoxic sediments through radial oxygen loss, and the extent of oxic and anoxic areas strongly correlated with the removal of ammonium and nitrogen oxides. Additionally, microscale spatio-temporal redox heterogeneity within the rhizosphere promoted nitrogen removal by stimulating the coupling between nitrification and denitrification. This study highlights the significant role of plants in controlling soil conditions and nitrogen cycling in constructed wetland systems.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agronomy
Matt A. Limmer, John Thomas, Angelia L. Seyfferth
Summary: The formation of iron plaques in rice is dependent on the growth stage, which may affect whether the plaques serve as a source or sink of elements such as phosphorous and arsenic.
Article
Environmental Sciences
Shunwen Bai, Juntong Chen, Mengran Guo, Nanqi Ren, Xinyue Zhao
Summary: Complex interactions between plants and microorganisms in constructed wetlands (CWs) play a crucial role in pollutant removal. The study examines the impact of radial oxygen loss (ROL) on microbial communities at different vertical spatial scales. It is found that ROL decreases with depth, leading to an oxidation-reduction rhizosphere microecosystem in CWs. The presence of aerobic bacteria in the upper layer and denitrifiers and methanotrophs in the lower layer contributes to COD and NH4+-N removal, as well as denitrification.
ENVIRONMENT INTERNATIONAL
(2023)
Article
Environmental Sciences
Kang Mei, Jingchun Liu, Jin Fan, Xin Guo, Jiajia Wu, Yi Zhou, Haoliang Lu, Chongling Yan
Summary: The study found that low-level arsenic contamination can promote the secretion of low-molecular-weight organic acids and the formation of Fe plaque in mangrove seedlings' rhizospheres, while inhibiting the rate of radial oxygen loss. In addition, low-level arsenic also increases the accumulation of arsenic in plants and plaque.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Review
Biochemistry & Molecular Biology
Zhongtao Jia, Ricardo F. H. Giehl, Nicolaus von Wiren
Summary: Optimal plant development requires plants to adjust their root architecture to optimize nutrient access and acquisition. Nutrient availability and plant demand are translated into cellular signals, often involving phytohormones, to trigger developmental responses. The timing and extent of these responses depend on the overall nutritional status of the plant, which is transmitted from shoots to roots through phytohormones or other systemic signals.
Review
Environmental Sciences
Sampriti Kataki, Soumya Chatterjee, Mohan G. Vairale, Sanjai K. Dwivedi, Dharmendra K. Gupta
Summary: Constructed wetland is an efficient eco-technological conglomerate that combines water security, energy possibility, and environmental protection. It is important to further explore the roles of individual wetland components, focusing on the effects of plants and biofilms, as well as the impact of alternative low-cost substrate materials on target pollutants.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Environmental Sciences
Maria Schuck, Maria Greger
Summary: This study compared the chloride removal capacity of 34 wetland plant species native to Sweden and further examined the salt tolerance and tissue chloride concentration of Carex pseudocyperus, C. riparia, and Phalaris arundinacea. The results showed variations in chloride removal capacity, accumulation, and tolerance among the species. C. riparia and P. arundinacea were identified as suitable candidates for further phytodesalination studies due to their high tolerance, large biomass, and high accumulation.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Zhufang Wang, Yinjing Zhang, Xiao Li, Jinkun Li, Zhimiao Zhao, Xin Hou
Summary: Root exudates are influenced by plant species configuration, which in turn affect microbial community and the purification efficiency of constructed wetlands (CWs). This study constructed four CWs with different plant configurations and found that CW-G3 with diverse plant species showed the highest removal efficiency of nutrients. The well-developed root aeration tissues in CW-G3 enabled the release of oxygen and organic carbon, supporting bacteria growth and nitrogen removal. The root exudates from different plant configurations also had different effects on microbial nitrification and denitrification processes.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Dominique S. Delias, Cristiane Jovelina Da-Silva, Angelita C. Martins, Denise S. C. de Oliveira, Luciano do Amarante
Summary: High iron concentration in the root medium leads to increased iron accumulation in roots and leaves, decreased concentration of certain essential nutrients, and altered activity of antioxidant enzymes in soybean plants under hypoxia, ultimately resulting in decreased photosynthetic pigments, leaf gas exchange, and plant growth.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Environmental Sciences
Shamima Moazzem, Muhammed Bhuiyan, Shobha Muthukumaran, Jill Fagan, Veeriah Jegatheesan
Summary: This article summarizes the role and importance of constructed wetlands in wastewater treatment. It highlights the significance of microorganisms in removing pollutants and suggests potential improvements for these systems from a microbiological perspective.
CURRENT POLLUTION REPORTS
(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.