Article
Engineering, Environmental
Yulu Wang, Chun-Yu Lai, Mengxiong Wu, Xuanyu Lu, Shihu Hu, Zhiguo Yuan, Jianhua Guo
Summary: This study showed that increasing copper concentration significantly enhanced the perchlorate reduction rate in a methane-based membrane biofilm reactor, as well as promoted methane oxidation and perchlorate reduction rates through adjusting the abundance of functional genes. A higher copper concentration also increased microbial community diversity and facilitated the synergistic association between methanotrophs and perchlorate reducers.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Nathan Stein, Aditi Podder, Jennifer Lee Weidhaas, Ramesh Goel
Summary: Cultivated fast-settling, anoxic sludge (FAS) was used to simultaneously reduce elevated levels of perchlorate and nitrate in an anaerobic sequencing batch reactor (AnSBR). The study achieved high average removal efficiencies of perchlorate and nitrate, with specific reduction rates increasing as the hydraulic retention time (HRT) was decreased. Nitrous oxide (N2O) production was observed due to incomplete denitrification, with different bacterial species enriched at different HRT levels.
Article
Environmental Sciences
Parsa Mohajeri, Carol M. S. Smith, Henry Wai Chau, Niklas Lehto
Summary: Nitrate contamination is a significant threat to water bodies, but low-cost materials like allophanic soil and carbon-based bio-wastes have shown potential in reducing nutrient concentrations. A new media called ALLODUST was evaluated for enhancing nitrate removal, with promising results in reducing both nitrate concentrations and nitrous oxide emissions. The study demonstrates the efficiency of the new operating approach in wastewater treatment and environmental protection.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Li He, Qi Yang, Yu Zhong, Fubing Yao, Bo Wu, Kunjie Hou, Zhoujie Pi, Dongbo Wang, Xiaoming Li
Summary: The electro-assisted autohydrogenotrophic reduction of perchlorate was successfully achieved using a dual-chamber biofilm-electrode reactor, with controlled pH and in-situ hydrogen generation. High-throughput sequencing revealed changes in microbial community composition with increasing perchlorate concentration.
Article
Agricultural Engineering
Lei Cao, Lei Ni, Li Qi, Haitao Wen, Zhe Wang, Jianqiang Meng, Xinbo Zhang, Yufeng Zhang
Summary: This study comprehensively evaluated the impact of hydraulic retention time (HRT) on the simultaneous removal of nitrate and micropollutants (MPs) in secondary effluent from wastewater treatment plants using post-denitrification fixed biofilm reactors (PDFBRs). The results showed that PDFBRs were effective in removing nitrate (over 94%), and extending HRT promoted the utilization of nonaromatic soluble microbial products with low molecular weight, leading to reduced biomass production. However, the removal efficiency of MPs in PDFBRs was below 48%. Microbial diversity increased with longer HRT, partially enhancing the removal of MPs. Batch experiments showed that changing HRT did not directly affect the biodegradation rates of the selected MPs. Correlation analysis identified Dechloromonas, Terrimonas, and Phreatobacter as potentially responsible for the simultaneous removal of MPs and nitrate. The abundance of the nosZ gene rapidly decreased under extreme HRT conditions. This study provides valuable insights into the removal of nitrate and MPs from secondary effluent using denitrifying biofilm systems.
BIORESOURCE TECHNOLOGY
(2023)
Article
Engineering, Environmental
Zifang Chi, Shijie Ju, Wenjing Wang, Huai Li, Yi-Hao Luo, Bruce E. Rittmann
Summary: This study demonstrated simultaneous Cr(VI) and NO3- bioreductions driven by C2H6 oxidation in a membrane biofilm reactor (MBfR). The biofilm was mainly composed of cocci and bacillus, and a Cr(III) precipitate was the major product of microbial Cr(VI) reduction.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Chun-Yu Lai, Mengxiong Wu, Xuanyu Lu, Yulu Wang, Zhiguo Yuan, Jianhua Guo
Summary: This study demonstrates that microbially reducing perchlorate in groundwater can be driven by ethane or propane under oxygen-limiting conditions, offering a cost-effective strategy for ex situ groundwater remediation. Analysis of transcript abundance and high-throughput sequencing revealed the key microorganisms involved in the process.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Chemical
H. Gimhani Madhushika, Thilini U. Ariyadasa, Sanja H. P. Gunawardena
Summary: A fixed-bed biofilm reactor (FBBR) was developed and its performance in decolorizing synthetic dye mixtures and textile industry effluents was evaluated. The study found that yeast extract played a crucial role in color removal, although the amount required in FBBR was significantly smaller than in suspended cell cultures. Structural changes in dyes were assessed using ultraviolet-visible spectral and high-performance liquid chromatography (HPLC) analyses. Gas chromatography-mass spectrophotometry (GC-MS) investigations confirmed the formation of non-toxic and benign metabolites.
CHEMICAL ENGINEERING & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Dandan Zhou, Yi-Hao Luo, Chen-Wei Zheng, Min Long, Xiangxing Long, Yuqiang Bi, Xiong Zheng, Chen Zhou, Bruce E. Rittmann
Summary: The H-2-MCfR introduces a method for in situ reduction and immobilization of Pd-0 catalysts, with high yield and controllable forms. This reactor allows rapid catalytic reduction of various oxyanions and organics at room temperature, with controlled reduction kinetics and selectivity through adjustments in Pd-0 loading, H-2 pressure, and pH.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Yuchun Yang, Zhongyi Lu, Mohammad Azari, Boran Kartal, Huan Du, Mingwei Cai, Craig W. Herbold, Xinghua Ding, Martin Denecke, Xiaoyan Li, Meng Li, Ji-Dong Gu
Summary: A new genus of anammox bacteria, Candidatus Loosdrechtia aerotolerans, has been discovered in a full-scale wastewater-treating biofilm system. This genus possesses unique enzymes involved in nitrate reduction and oxidative stress resistance. The discovery expands our understanding of the ecophysiology of anammox bacteria and provides valuable insights for anammox-based wastewater treatment systems operation.
Article
Engineering, Environmental
Jing Ma, Wei Wei, Guotong Qin, Tianliang Xiao, Weiqiang Tang, Shuangliang Zhao, Lei Jiang, Shaomin Liu
Summary: This study introduces a porous tubular carbon membrane as the electrode with catalysts for nitrate removal reactions. The achieved nitrate removal rate is significantly higher than other methods, with high conversion and selectivity to nitrogen. The use of Cu-Pd bimetal catalysts inside the membrane enhances activity and selectivity, leading to improved nitrate removal efficiency.
Article
Engineering, Chemical
Jing Ma, Wei Wei, Guotong Qin, Lei Jiang, Ngie Hing Wong, Jaka Sunarso, Shaomin Liu
Summary: This study presents an efficient reactor design that integrates an electrocatalytic packed-bed reactor with a membrane for nitrate removal. The reactor system shows excellent nitrate removal and nitrogen selectivity, highlighting the potential for large-scale nitrate remediation.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Agricultural Engineering
Xiaodan Zhao, Jie Jiang, Zhen Zhou, Yue Zheng, Yanjun Shao, Yi Zuo, Yuqing Ren, Ying An
Summary: This study investigated the effects of hydraulic retention time of anaerobic side-stream reactors on nitrogen removal in four anoxic/oxic membrane bioreactors. The results showed that upgrading with anaerobic side-stream reactors and carriers can enhance nitrogen removal efficiency by increasing denitrifying bacteria and secondary substrate release. Additionally, metagenomic analysis revealed higher abundances of genes related to nitrogen consumption processes in the upgraded reactors, confirming their pivotal roles in nitrogen metabolism.
BIORESOURCE TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Changxu Ren, Peng Yang, Jiaonan Sun, Eric Y. Bi, Jinyu Gao, Jacob Palmer, Mengqiang Zhu, Yiying Wu, Jinyong Liu
Summary: This study introduces a hybrid catalyst for reducing aqueous ClO4- into Cl- at room temperature with 1 atm of H-2, showing high turnover number and turnover frequency.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Biotechnology & Applied Microbiology
Luiz F. Bianchini, Romeu C. P. da Silva Ramos, Nicoly S. de Oliveira, Rafaela C. de Paula, Rosimeire T. Rosa, Jarka Glassey, Edvaldo A. R. Rosa
Summary: The hybrid fixed bed-airlift reactor model showed superior hydrodynamic and rheological parameters, improved oxygenation process, and facilitated fungal biofilm formation, leading to enhanced biotransformation processes. High-performance liquid chromatography analyses confirmed the effectiveness of the model in drug biotransformation.
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
(2021)
Article
Agricultural Engineering
Jea Youl Joung, Hae Woo Lee, Hyeoksun Choi, Min Woo Lee, Jong Moon Park
BIORESOURCE TECHNOLOGY
(2009)
Article
Engineering, Environmental
Seung Han Woo, Che Ok Jeon, Yeoung-Sang Yun, Hyeoksun Choi, Chang-Soo Lee, Dae Sung Lee
JOURNAL OF HAZARDOUS MATERIALS
(2009)
Article
Engineering, Civil
In-Hyun Nam, Chul-Min Chon, Ka-Young Jung, Sun-Gyu Choi, Hyeoksun Choi, Sung-Sik Park
KSCE JOURNAL OF CIVIL ENGINEERING
(2015)
Article
Biochemistry & Molecular Biology
Min Woo Lee, Sung Hun Hong, Hyeoksun Choi, Ji-Hoon Kim, Dae Sung Lee, Jong Moon Park
PROCESS BIOCHEMISTRY
(2008)
Article
Environmental Sciences
Hyeoksun Choi, Sanghwa Oh
Article
Engineering, Chemical
Hyun-Woo Kim, Seong Hwan Hong, Hyeoksun Choi
Article
Engineering, Chemical
Hyun-Woo Kim, Seong Hwan Hong, Hyeoksun Choi
Article
Biotechnology & Applied Microbiology
Hyeoksun Choi, JoAnn Silverstein
BIOTECHNOLOGY AND BIOENGINEERING
(2007)
Article
Engineering, Environmental
Shun-Shun Chen, Xu-Xiu Chen, Tian-Yu Yang, Li Chen, Zheng Guo, Xing-Jiu Huang
Summary: A temperature-modulated sensing strategy was proposed to identify and determine BTEX compounds. Highly effective identification of BTEX was achieved using linear discrimination and convolutional neural network analyses. Additionally, quantitative analysis of concentration was accomplished by establishing the relationship between concentration and response.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Myungkyung Noh, Jeong Yeon Sim, Jisung Kim, Jee Hwan Ahn, Hye-Young Min, Jong-Uk Lee, Jong-Sook Park, Ji Yun Jeong, Jae Young Lee, Shin Yup Lee, Hyo-Jong Lee, Choon-Sik Park, Ho-Young Lee
Summary: This study reveals that chronic exposure to PM induces chronic inflammation and development of COPD by dysregulating NAD+ metabolism and subsequent SIRT1 deficiency in pulmonary macrophages. Activation of SIRT1 by resveratrol effectively mitigates PM-induced inflammation and COPD development. Targeting metabolic and epigenetic reprogramming in macrophages induced by PM is a promising strategy for COPD treatment.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Yu Liu, Linlin Qin, Yiming Qin, Tong Yang, Haoran Lu, Yulong Liu, Qiqi Zhang, Wenyan Liang
Summary: Co/NC/PAC electrode was prepared by compounding ZIF-67 with powder-activated carbon for the electrocatalytic treatment of nitrogen-containing heterocyclic compounds. The degradation efficiency of the four compounds reached 90.2-93.7% under optimal conditions, and the degradation order was pyridazine < pyrimidine < pyrazine < pyridine.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Julien Couturier, Pierre Tamba Oulare, Blanche Collin, Claire Lallemand, Isabelle Kieffer, Julien Longerey, Perrine Chaurand, Jerome Rose, Daniel Borschneck, Bernard Angeletti, Steven Criquet, Renaud Podor, Hamed Pourkhorsandi, Guilhem Arrachart, Clement Levard
Summary: This study analyzes the properties of bauxite residue samples and explores the influence of bauxite ore origin, storage conditions, and storage time. The results show that the speciation of yttrium is related to the origin of bauxite ore, while no significant variation was observed with storage conditions or aging of the residues.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Sakthinarenderan Saikumar, Ravi Mani, Mirunalini Ganesan, Inbakandan Dhinakarasamy, Thavamani Palanisami, Dharani Gopal
Summary: Microplastic contamination in marine ecosystems poses a growing concern due to its trophic transfer and negative effects on marine organisms. This study investigates the transfer and impacts of polystyrene microplastics in an estuarine food chain. The results show that microplastics can be transferred through the food chain, although the transfer rates are low. The exposed organisms exhibit stress responses, suggesting the potential risk of microplastics reaching humans through the food chain.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Review
Engineering, Environmental
Yan-Jiao Li, Ying Yuan, Wen-Bing Tan, Bei-Dou Xi, Hui Wang, Kun-Long Hui, Jia-Bao Chen, Yi-Fan Zhang, Lian-Feng Wang, Ren-Fei Li
Summary: This review investigated and analyzed the distribution, composition, and abundance of heavy metals and antibiotic resistance genes (ARGs) in landfill. The results showed that heavy metals have lasting effects on ARGs, and complexes of heavy metals and organic matter are common in landfill. This study provides a new basis to better understand the horizontal gene transfer (HGT) of ARGs in landfill.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Jessy Joseph, Ari Vaisanen, Ajay B. Patil, Manu Lahtinen
Summary: Efficient and environmentally friendly porous hybrid adsorbent beads have been developed for the removal of arsenic from drinking water. The structural tuning of the adsorbents has been shown to have a significant impact on their adsorption performance, with high crystallinity leading to increased adsorption capacity and selectivity towards As5+.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Yangyang Liu, Minhua Xiao, Kaiqin Huang, Juntao Cui, Hongli Liu, Yingxin Yu, Shengtao Ma, Xihong Liu, Meiqing Lin
Summary: This study measured the levels of phthalate metabolites in breast milk collected from mothers in southern China. The results showed that phthalates are still prevalent in the region, and breastfeeding contributes to phthalate intake in infants. However, the levels detected do not pose significant health risks to infants based on dietary exposure. The increasing exposure to certain phthalates calls for further research into their sources and potential risks.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Zhiqiang Wu, Jianxing Sun, Liting Xu, Hongbo Zhou, Haina Cheng, Zhu Chen, Yuguang Wang, Jichao Yang
Summary: Ocean depth affects microbial diversity, composition, and co-occurrence patterns of microplastic microbial communities. Deterministic processes dominate the assembly of mesopelagic plastisphere microbial communities, while stochastic processes shape the assembly of bathypelagic microbial communities. The relationships between microorganisms in the mesopelagic layer are more complex and stable, with Proteobacteria and Actinobacteriota playing important roles.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Tingting Xiao, Renjie Chen, Chen Cai, Shijie Yuan, Xiaohu Dai, Bin Dong, Zuxin Xu
Summary: Based on the efficiency of catalytic ozonation techniques in enhancing sludge dewaterability, this study investigated its effectiveness in simultaneous reduction of antibiotics and antibiotic resistance genes. The results showed that catalytic ozonation conditioning changed the distribution of antibiotics and achieved high degradation rates. It also significantly reduced the abundance of ARGs, inhibited horizontal gene transfer, and decreased the signal transduction of typical ARGs host bacteria.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Yang Deng, Xiaohong Guan
Summary: This article discusses two different development approaches for ferrate(VI) technology in water treatment, arguing that process integration is a promising method that can drive technological innovation and revolution in water treatment, achieving higher treatment efficiency, reduced costs and energy consumption, and a smaller physical footprint.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Zhe Zhang, Lu Zhang, Zhihao Huang, Yuxin Xu, Qingqing Zhao, Hongju Wang, Meiqing Shi, Xiangnan Li, Kai Jiang, Dapeng Wu
Summary: In this study, a floating catalytic foam was designed and prepared to enhance the mass transfer in immobilized photocatalysts for wastewater treatment. The floating catalytic foam could float on the water surface and establish a temperature gradient, effectively promoting the diffusion and adsorption of target molecules during the photocatalytic process.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Muhammad Nafees, Adiba Khan Sehrish, Sarah Owdah Alomrani, Linlin Qiu, Aasim Saeed, Shoaib Ahmad, Shafaqat Ali, Hongyan Guo
Summary: The accumulation of cadmium and antibiotics in edible plants and fertile soil is a worldwide problem. This study investigated the potential of zinc oxide nanoparticles to alleviate the toxicity of both cadmium and antibiotics and promote spinach growth.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Lurui Wan, Kai Wang, Yuan Chen, Zhiyong Xu, Wenbo Zhao
Summary: In this study, a low viscosity and high thermal stability SO2 absorbent with dual interacting sites was successfully synthesized. The absorbent showed the highest absorption enthalpy change and entropy change values among reported SO2 absorbents, and exhibited lower viscosity and comparable thermal stability to ILs.
JOURNAL OF HAZARDOUS MATERIALS
(2024)
Article
Engineering, Environmental
Zhengwei Zhou, Guojie Ye, Yang Zong, Zhenyu Zhao, Deli Wu
Summary: This study utilized Mo powder and STPP to enhance the performance of the sodium percarbonate system in pollutant degradation. The presence of Mo and STPP resulted in a higher degradation rate of the model pollutant SMX, with low oxidant consumption. The system generated multiple active species through a series of chain reactions at different pH values, exhibiting excellent performance towards electron-rich pollutants. Furthermore, Mo demonstrated excellent stability and reusability.
JOURNAL OF HAZARDOUS MATERIALS
(2024)