Review
Environmental Sciences
Amina Richa, Sami Touil, Meriem Fizir
Summary: This review introduces tracking tools for nitrate sources in groundwater and discusses methods for nitrate removal. Possible solutions to overcome the limitations of these methods are also proposed.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Shengnan Ke, Jiajun Chen, Xilai Zheng, Xiaowen Sun
Summary: This study used the reference ion method to identify the main sources and contribution rates of nitrate pollution in groundwater, as well as to estimate denitrification rates. The results showed significant differences in nitrate contribution rates and denitrification rates between vegetable planting areas and grain planting areas.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
So Yeon Yoon, Min Ji Kim, Hye Won Kim, Seon Hwa Lim, Choe Earn Choong, Sang-Eun Oh, Jung Rae Kim, Yeomin Yoon, Jae young Choi, Eun Ha Choi, Min Jang
Summary: The aim of this study was to investigate the effects of hydrophilic sulfur-modified nanoscale zero-valent iron (S-nZVI) as a biocatalyst for denitrification. The researchers found that the denitrifying bacteria Cupriavidus necator promote Fe corrosion during biocatalytic denitrification, resulting in a higher synergistic factor for S-nZVI compared to nanoscale zero-valent iron. Kinetic profiles showed that the preferred electron acceptor for biocatalytic denitrification using S-nZVI and C. necator was SO42-, and up-flow column experiments demonstrated a high nitrogen removal capacity using S-nZVI for 127 days. Microbiome taxonomic profiling revealed that the addition of S-nZVI promoted the growth of specific microbes that can enhance denitrification.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Geosciences, Multidisciplinary
Baoqiang Ma, Tianming Huang, Jie Li, Zhenbin Li, Yin Long, Fen Zhang, Zhonghe Pang
Summary: Recent human activities have caused nitrate pollution in shallow groundwater, while deep groundwater mainly originates from soil nitrogen. Denitrification process is not evident in the unsaturated zone, indicating a minor impact on groundwater quality.
Review
Biotechnology & Applied Microbiology
Sanjrani Manzoor Ahmed, Saeeda Rind, Keenjhar Rani
Summary: Nitrogen mitigation is a serious environmental issue globally, and biological denitrification with the addition of the best external carbon source is recommended for wastewater treatment. Wetlands are key sites for denitrification and can be carried out using different methods. This paper reviews the literature to evaluate biological denitrification and demonstrates cost-effective external carbon sources. The results show that carbon source is the main contributor and booster for denitrification, and it is concluded that biological denitrification with the addition of an external carbon source is a cost-effective and best option for nitrogen mitigation in a changing world. Textile waste is recommended for the recovery of carbon source based on the literature reviewed.
BIOTECHNOLOGY AND BIOENGINEERING
(2023)
Article
Materials Science, Textiles
Mustafa Ersin Pekdemir
Summary: This study focused on characterizing composites of carbon fiber with various polymers, including PVC, PCL, and a PVC/PCL blend. Using ATR-IR, SEM-EDX, XRD, and Electrical Resistivity techniques, the researchers were able to determine properties such as activation energy, thermal behavior, glass transition temperature, morphology, and electrical resistivity of the composites.
FIBERS AND POLYMERS
(2021)
Article
Engineering, Environmental
Ruihua Li, Mengsha Guan, Wei Wang
Summary: This study demonstrates that pyrrhotite can effectively remove arsenite and nitrate from groundwater, with the PAD technology providing a simple and cost-effective way for remediation. The PSLAD biofilter achieved good removal efficiency under a hydraulic retention time of 6 hours, showing the potential for practical application in addressing co-contaminated groundwater.
Article
Chemistry, Physical
Therese Eriksson, Amber Mace, Jonas Mindemark, Daniel Brandell
Summary: Polyesters and polycarbonates are considered as alternatives to polyethers for polymer electrolytes in solid-state lithium-ion batteries. The coordinating strength towards lithium ions varies due to different electron densities on the coordinating carbonyl oxygen. The cationic transference number depends linearly on the ester content, and despite contradictory measurements, DFT calculations showed carbonate coordinates more strongly to lithium ions.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)
Article
Environmental Sciences
Ling-Zhi Zhang, Wei He, Fu-Yi Huang, Wei He, Pengpeng Zhou, Cuibai Chen, Christopher Rensing, Kristian Koefoed Brandt, Jiangtao He, Fei Liu, Yi Zhao, Huaming Guo
Summary: This study investigated the microbial community, nitrogen metabolic attributes, and their responses to NO3--N pollution in suburban groundwater in Beijing. The results showed that groundwater with higher NO3--N concentrations had lower microbial richness and abundance of N metabolic genes, and denitrification was the dominant N cycling process. The study also found significant associations between NO3--N, NH4+-N, microbial taxonomy, and N functional attributes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Environmental Sciences
Zhong-Jun Wang, Fu-Jun Yue, Ji Lu, Yu-Chun Wang, Cai-Qing Qin, Hu Ding, Li-Li Xue, Si-Liang Li
Summary: In karst areas, the sources, transformations, and transport processes of nitrate in groundwater during rainfall events are complex. This study found that nitrate in karst groundwater mainly originates from chemical fertilizers and is influenced by denitrification. Rainwater transports nitrogen from the soil to groundwater through fissures, fractures, and conduits.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
Camille Vautier, Tamara Kolbe, Tristan Babey, Jean Marcais, Benjamin W. Abbott, Anniet M. Laverman, Zahra Thomas, Luc Aquilina, Gilles Pinay, Jean-Raynald de Dreuzy
Summary: The study indicates that predicting groundwater nitrate concentration can be effectively approximated with a limited number of key parameters, while historical nitrogen input time series can be simplified without substantially altering predictions. Mean and standard deviation of residence time distribution can help make reasonable predictions at watershed to regional scales.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Green & Sustainable Science & Technology
Zihan Zhu, Youcai Zhao, Lianghu Su, Tao Zhou
Summary: The study finds that Rotten Banana Powder (RBP) can be a cost-efficient carbon source for denitrification in wastewater treatment. RBP, with rapid organic release and low residual properties, achieves high nitrate removal rate and denitrification rate, and improves the stability of sludge in the denitrification system.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Engineering, Environmental
Tatsuru Kamei, Yuya Tsutsumi, Suphatchai Rujakom, Rawintra Eamrat, Futaba Kazama
Summary: This study optimized the performance of a hydro-genotrophic denitrification (HD) reactor for nitrate-contaminated groundwater treatment by introducing a microbubble diffuser (MD), and evaluated its performance stability. The HD reactor continuously maintained effluent NO3--N and NO2--N concentrations below the drinking water standard for 200 days under optimized conditions. The experimental results lead to the development of an effective HD reactor for nitrate-contaminated groundwater treatment and can facilitate the improvement of water security.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Environmental Sciences
Ruinan Liu, Lu Xia, Manxi Liu, Zongjun Gao, Jianguo Feng, Haichi You, Wanlong Qu, Tongju Xing, Jing Wang, Yanli Zhao
Summary: The study found that the addition of an external carbon source can improve the nitrate removal rate in groundwater during biological denitrification, with an optimal concentration observed at 2 g/L of glucose.
ENVIRONMENTAL TECHNOLOGY
(2022)
Article
Environmental Sciences
Wanlong Qu, Litao Suo, Ruinan Liu, Manxi Liu, Yanli Zhao, Lu Xia, Yali Fan, Qiufeng Zhang, Zongjun Gao
Summary: Temperature has a significant impact on the efficiency of nitrate removal from groundwater and the structure of microbial communities. The most efficient nitrate removal can be achieved at 40 degrees Celsius.
Article
Soil Science
Aiming Yin, Yanping Jia, Tianlei Qiu, Min Gao, Shoutao Cheng, Xuming Wang, Yanmei Sun
APPLIED SOIL ECOLOGY
(2018)
Article
Environmental Sciences
Mo Chen, Tianlei Qiu, Yanmei Sun, Yuan Song, Xuming Wang, Min Gao
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2019)
Article
Environmental Sciences
Yanmei Sun, Tianlei Qiu, Min Gao, Mingming Shi, Haifeng Zhang, Xuming Wang
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2019)
Article
Environmental Sciences
Shoutao Cheng, Mingming Shi, Lijun Xing, Xuming Wang, Haoze Gao, Yanmei Sun
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2020)
Article
Ecology
Guibing Zhu, Xiaomin Wang, Ting Yang, Jianqiang Su, Yu Qin, Shanyun Wang, Michael Gillings, Cheng Wang, Feng Ju, Bangrui Lan, Chunlei Liu, Hu Li, Xi-En Long, Xuming Wang, Mike S. M. Jetten, Zifa Wang, Yong-Guan Zhu
Summary: The study found widespread presence of antibiotic resistance genes (ARGs) in fresh snow, and their dissemination may be exacerbated by air pollution. Snowfall effectively spreads ARGs from point sources to the Earth's surface, highlighting the need for better pollution control measures to reduce the global dissemination risk of antibiotic resistance genes.
Article
Environmental Sciences
Yanmei Sun, Yajie Guo, Mingming Shi, Tianlei Qiu, Min Gao, Shulei Tian, Xuming Wang
Summary: This study investigated the distribution of different types of antibiotics in a soil-vegetable system, revealing that both antibiotic type and vegetable species jointly shape the profiles of soil microorganisms and antibiotic resistance genes.
Article
Environmental Sciences
Tianlei Qiu, Dan Wu, Lixin Zhang, Dexun Zou, Yanmei Sun, Min Gao, Xuming Wang
Summary: This study compared the antibiotic residues and ARG profiles in layer and broiler manure, showing that broiler manure contained more residual tetracyclines and higher relative abundances of qnrS and ermA genes. Most ARGs decreased after composting, but sulfonamide resistance gene sul1 increased and had a significant positive correlation with thermophilic bacteria in compost.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Engineering, Environmental
Yajie Guo, Tianlei Qiu, Min Gao, Yanmei Sun, Shoutao Cheng, Haoze Gao, Xuming Wang
Summary: Analysis of endophytic antibiotic resistance genes (ARGs) in four leafy vegetables revealed significant effects of vegetable species on ARG diversity and abundance, with pak choi accumulating more ARGs in its microbiome. Bacterial community was identified as the primary factor shaping ARG profiles and correlated significantly with specific ARG subtypes. Shared ARGs and bacterial families across the vegetables, particularly in Proteobacteria, were also identified, emphasizing potential health risks associated with raw vegetable consumption.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Jieya Zhou, Hongbo Liu, Hao Wu, Xuming Wang, Yunpeng Shen, AiLing Ren, Shulei Tian, Yingqun Ma
Summary: The study found that hydrothermal and spray-dried treatment of cephalosporin mycelia dregs can increase crop yield and stabilize soil fertility indicators, with no significant impact on the antibiotic resistome in the soil. The application of these treated dregs nationwide is predicted to result in significant economic benefits.
ENVIRONMENTAL RESEARCH
(2021)
Article
Environmental Sciences
Jieya Zhou, Ran Ping, Hao Wu, Hongbo Liu, Xuming Wang, AiLing Ren, Shulei Tian, Yingqun Ma
Summary: The study developed a system called SEA-CBS to convert antibiotic fermentation residues into organic fertilizers, achieving a high removal rate of 99.9% for antibiotics. The fertilizer showed significant improvement in plant growth, and the study also investigated the attenuation rule of antibiotic residues in soil and the distribution of antibiotic resistant genes.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Min Gao, Xiaole Zhang, Yang Yue, Tianlei Qiu, Jing Wang, Xuming Wang
Summary: Animal husbandry is a significant contributor to increased environmental antimicrobial resistance. This study found that layer poultry farms contribute to the airborne transmission of antimicrobial resistance genes in Beijing's urban air. The exposure to these genes may have health implications for residents.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
Ruonan Wang, Aoyuan Yu, Tianlei Qiu, Yajie Guo, Haoze Gao, Xingbin Sun, Min Gao, Xuming Wang
Summary: This study analyzed the aerosol behavior of fungi in compost piles and the surrounding air using high-throughput sequencing and ddPCR. The results showed differences in fungal diversity and richness between the air and composting piles. The dominant fungal phyla in both media were Ascomycota and Basidiomycota. The study also found that fungal abundance in composting piles was significantly correlated with abundance in the air. Furthermore, the analysis revealed that a large proportion of fungal genera, including some pathogenic/allergenic genera, might escape from composting piles and potentially aerosolize. The influence of physicochemical parameters and heavy metals on the aerosol behavior of different fungal genera varied. These findings enhance our understanding of fungal escape during composting and emphasize the importance of aerosolization behavior for predicting airborne fungal composition and human health risks in compost facilities.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH
(2022)
Article
Genetics & Heredity
Tianlei Qiu, Linhe Huo, Yajie Guo, Min Gao, Guoliang Wang, Dong Hu, Cheng Li, Zhanwu Wang, Guiming Liu, Xuming Wang
Summary: This study comprehensively analyzed the common resistome and its potential mobility and hosts in animal manure and composts. The results showed that composting can help mitigate ARGs in animal manure by altering bacterial hosts, but persistent ARGs can still escape removal due to their broad host range and association with mobile genetic elements.
ENVIRONMENTAL MICROBIOME
(2022)
Article
Environmental Sciences
Yajie Guo, Tianlei Qiu, Min Gao, Shuhua Ru, Haoze Gao, Xuming Wang
Summary: The amendment of organic fertilizer from livestock manure or biosolids is a significant driver of increasing antibiotic resistance in agricultural soils. However, it remains uncertain whether increasing the application rates of organic fertilizers consistently enhances soil antibiotic resistance levels. This study found that higher fertilization rates were associated with higher abundance of antibiotic resistance genes (ARGs) in soils, but the increase ceased to be significant when the fertilization rate exceeded 45 t/ha/y. The study also identified the correlation between soil ARG abundance and total nitrogen content, pH, bacterial abundance, and diversity.
ENVIRONMENTAL POLLUTION
(2023)
Article
Biotechnology & Applied Microbiology
Shoutao Cheng, Mo Chen, Min Gao, Tianlei Qiu, Shulei Tian, Shuyan Li, Xuming Wang
Summary: The supplement of Enterococcus faecalis did not significantly affect the bacterial diversity in the air of piglet and layer hen houses, but it did decrease the relative abundance of Proteobacteria. Additionally, it also reduced the relative abundance of opportunistic pathogens and enriched beneficial bacterial genus like Lactobacillus in both feces and indoor air.
JOURNAL OF GENERAL AND APPLIED MICROBIOLOGY
(2021)
