Article
Engineering, Environmental
Zhenxin Wang, Xuepeng Wang, Ye Sun, Qilin Yu, Zhiqiang Zhao, Yaobin Zhang
Summary: It is observed that the ratio of nitrite consumption to ammonia consumption in Anammox systems is lower than its stoichiometry, but the reason remains unknown. This study found that the addition of Fe(OH)3 significantly decreased the ratio of nitrite to ammonia consumption in an Anammox system. The reduction of Fe(OH)3 likely served as an extracellular electron acceptor, facilitating NH4+ oxidation via Feammox pathway.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Mabruk Adams, Junxiang Xie, Yaofeng Chang, Arthur Wendinso Judicael Kabore, Chongjun Chen
Summary: The Anammox process has been widely studied for optimizing performance in biological nitrogen removal from wastewaters. The addition of 5% coconut biochar led to the fastest startup with 96% ammonium removal efficiency in 46 days, while different biochar types resulted in varied microbial communities in the setups.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Engineering, Environmental
Buqing Chen, Yujie Qin, Chenglong Wu, Zhiju Liu, Lan Yang, Siyuan Gong, Shaohong Zheng
Summary: This study assessed the effect of glucose in a DEAMOX reactor, and found that adding glucose can promote nitrogen removal efficiency while maintaining a synergic relationship between denitrification microorganisms and anammox microorganisms during the DEAMOX process.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Review
Engineering, Environmental
Zhenyu Wang, Zaoli Gu, Yifeng Yang, Ben Dai, Siqing Xia
Summary: This review summarizes the role of biochar in facilitating the anammox process, including shortening start-up time, improving nitrogen removal performance, and alleviating contaminants inhibition. Furthermore, it points out the need for future research on biochar modification and the development of composite carriers.
JOURNAL OF WATER PROCESS ENGINEERING
(2022)
Article
Engineering, Environmental
Xinyi Zou, Mengjie Ma, Jiachen Zhu, Qun Zhang, Qianfei Cao, Sami Khasraw Hamid, Chongjun Chen
Summary: The study found that salinity, represented by SO42-, has an impact on the anammox reaction. Increasing concentrations of SO42- decreased the removal efficiency of NH4+-N and NO2--N, as well as affected the sludge characteristics and microbial community structure.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Environmental
Yingbin Hu, Ning Li, Jin Jiang, Yanbin Xu, Xiaonan Luo, Jie Cao
Summary: By adding activated carbon as an electron shuttle, this study successfully integrated Feammox and anammox processes to enhance the autotrophic biological nitrogen removal system. The total nitrogen removal efficiency reached 82.9% by utilizing AC as an effective method to improve Feammox and anammox activities.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2022)
Article
Environmental Sciences
Wei Zhang, Xin Zhou, Xiwei Cao, Shuhan Li
Summary: This study introduces low intensity ultrasound into anaerobic sequencing batch biofilm reactors (ASBBRs) to enhance anammox nitrogen removal from nitrogen-rich wastewater. The study demonstrates a close correlation between nitrogen removal and shifts in transformation and intensity of spectrum peaks, as well as changes in the anammox consortium. The research provides a viable and promising acceleration strategy for anammox-based process.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Agricultural Engineering
Yifei Wang, Dongpeng Li, Xinshan Song, Xin Cao, Zhongshuo Xu, Wei Huang, Yuhui Wang, Zhiwei Wang, Wolfgang Sand
Summary: A novel biological ammonium removal process was developed using a lab-scale constructed wetland filled with manganese ores and granular active charcoal. It significantly enhanced nitrogen removal and revealed the functional genes and taxonomic groups related to nitrogen transformation, as well as characteristics of extracellular electron transfer.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Wenli Fan, Yunfan Chen, Bo Yuan, Xi Chen, Qian Wang, Shuang Zhao, Wenlin Jia
Summary: The effects of different static magnetic field (SMF) intensities on nitrogen removal in Anammox batch reactors were analyzed, as well as the influence of influent nitrogen concentration. The results showed that applying an appropriate SMF intensity enhanced nitrogen removal performance, especially under high nitrogen loading conditions. A SMF intensity of 40 mT at normal nitrogen loading conditions resulted in the highest total nitrogen removal efficiency. Additionally, SMF strengthened the metabolic pathways related to bacterial growth and resistance to environmental stress.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Agricultural Engineering
Zhenxin Wang, Cheng Sun, Yue Zhou, Qilin Yu, Xiaochen Xu, Zhiqiang Zhao, Yaobin Zhang
Summary: Adding Fe(OH)3 to Anammox systems can enhance the activity of ammonia oxidizing microorganisms and improve NH4+-N removal in the Anammox sludge system. Fe(OH)3 can also promote the polarization of functional groups of outer membrane cytochrome, benefiting extracellular electron transfer.
BIORESOURCE TECHNOLOGY
(2022)
Article
Engineering, Environmental
Kiprotich Kosgey, Oluyemi O. Awolusi, Sammy L. Kiambi, Mushal Allam, Arshad Ismail, Faizal Bux, Kartik Chandran, Sheena Kumari
Summary: The study analyzed the impact of mixing conditions on nitrogen removal and community structures in different reactor configurations, showing that mixing conditions influenced process performance and community dynamics in the reactors.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Engineering, Environmental
Suyan Pang, Gan Zhang, Yingbin Hu, Xiaonan Luo, Ning Li, Jialiang Zhu, Jin Jiang, Bin Han, Tong Shen
Summary: This study evaluated the effect and potential mechanism of coconut shell and coal biochars on facilitating TN removal of anammox process. The results showed that both types of biochar could promote TN removal efficiency despite differences in surface groups and electron transfer capacity. Biochar could provide electrons for nitrite reduction and receive electrons from hydrazine oxidation, resulting in lower Delta NO3--N/Delta NH4+-N compared to the control reactor. Candidatus Jettenia outcompeted Candidatus Brocadia in the presence of biochar, and the abundance of Limnobacter also increased.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Environmental
Li Zhang, Zixuan Song, Tingjun Dong, Xuepeng Fan, Yongzhen Peng, Jiachun Yang
Summary: This study demonstrated that the addition of activated carbon-loaded nano-zero-valent iron (nZVI-C) composites could overcome the inhibition of tetracycline hydrochloride (TCH) on anaerobic ammonium oxidation bacteria (AnAOB). The results showed that 500 mg L-1 nZVI-C effectively mitigated the long-term inhibition of 1.5 mg L-1 TCH on AnAOB and significantly improved the total nitrogen removal efficiency (TNRE) from 65.27% to 86.99%. Spectroscopic analysis revealed that nZVI-C increased the content of N-H and C--O groups in EPS, which contributed to the adsorption of TCH. The accumulation of humic acid-like substances in EPS was also conducive to strengthening the extracellular defense level. Furthermore, TCH-degrading bacteria (Clostridium and Mycobacterium) were enriched in situ, and the abundance of Ca. Brocadia was significantly increased from 10.69% to 18.59%. Additionally, nZVI-C increased the abundance of genes encoding tetracycline inactivation (tetX) and promoted the mineralization of TCH by 90%, weakening the inhibition of TCH on microbial nitrogen metabolism. nZVI-C accelerated the electron consumption of anammox bacteria by upregulating the abundance of electron generation genes (nxrA, hdh) and providing electrons directly.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Environmental Sciences
Liurui Peng, Rui Shi, Youqi Tao, Qian Huang, Maoyuan Yang, Yuecheng He, Wenlai Xu
Summary: This study investigates the feasibility of starting and operating anammox at low temperatures and finds that it is possible to achieve high nitrogen removal efficiency without the need for heating, making it a potentially energy-saving and cost-effective method.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Environmental
Mengjiao Gao, Hongyu Dang, Xin Zou, Najiaowa Yu, Hengbo Guo, Yiduo Yao, Yang Liu
Summary: The addition of granular activated carbon (GAC) in anammox reactors significantly shortened the enrichment time and improved the nitrogen removal efficiency. GAC likely enhanced the oxidation reaction, increased the concentration of signal molecules, and promoted the growth of microorganisms.
Article
Environmental Sciences
Xiao Ma, Yuan Yan, Weigang Wang, Jianhua Guo, Yayi Wang
Article
Engineering, Environmental
Weigang Wang, Hongchao Xie, Han Wang, Hao Xue, Junjie Wang, Mingda Zhou, Xiaohu Dai, Yayi Wang
Article
Ecology
Weigang Wang, Yuhao Zhao, Guangmeng Jiang, Yayi Wang
Article
Engineering, Environmental
Weigang Wang, Junjie Wang, Han Wang, Jie Ma, Min Wu, Yayi Wang
Article
Environmental Sciences
Junjie Wang, Zhuwu Jiang, Weigang Wang, Han Wang, Yao Zhang, Yayi Wang
Summary: Continuous aeration in MBBRs leads to higher microbial activity and more sludge discharge, resulting in structurally unstable biofilm; meanwhile, intermittent aeration results in biofilms with higher proportions of humic substances due to more dead cells, and the accumulation of humic substances due to less sludge discharge.
Article
Environmental Sciences
Weigang Wang, Hao Xue, Han Wang, Jie Ma, Min Wu, Yayi Wang
Summary: The study found that EPS extraction stimulated the adherence properties of all sludge samples. Anammox consortia exhibited the highest adhesion rate and mass, forming the most compact layer on sensor surfaces both before and after EPS extraction. The high adhesion ability of anammox granules is mainly attributed to their relatively high extracellular proteins/polysaccharides ratio.
ENVIRONMENTAL RESEARCH
(2021)
Article
Environmental Sciences
Hao Xue, Weigang Wang, Hongchao Xie, Yayi Wang
Summary: This study compared different types of floating sludge and discussed the mechanisms of floating and measures to mitigate floating in anammox reactors. The results indicated that the floatation of sludge is related to gas accumulation or adhesion onto the sludges, and the reversibility of floatation depends on sludge intensity and hydraulic shear force.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Han Wang, Yufei Fan, Mingda Zhou, Weigang Wang, Xiang Li, Yayi Wang
Summary: This study found that Fe(III) minerals play an important role in the anaerobic ammonium oxidation (anammox) process. They increase the activity of granule formation, nitrogen removal, and enhance the resistance of microbial communities to environmental disturbances. However, the extra addition of Fe(III) minerals has limited promotion on anammox central metabolism in the presence of sufficient Fe(II).
Article
Engineering, Environmental
Weigang Wang, Tong Wang, Qinghua Liu, Han Wang, Hao Xue, Zhuoran Zhang, Yayi Wang
Summary: Using bamboo biochar as a mediator can stimulate the DNRA pathway of anammox bacteria and enhance nitrogen removal efficiency.
Article
Engineering, Environmental
Han Wang, Junjie Wang, Mingda Zhou, Weigang Wang, Chao Liu, Yayi Wang
Summary: A two-stage PN-Anammox process was established to efficiently remove nitrogen from incineration leachate, with satisfactory removal efficiencies of nitrogen and COD achieved despite fluctuating influent properties. A versatile control strategy was developed to create an optimum autotrophic environment for nitrifier and anammox bacteria. This strategy provides a promising approach for the sustainable treatment of incineration leachate.
Review
Engineering, Environmental
Xiaochuan Ran, Mingda Zhou, Tong Wang, Weigang Wang, Sheena Kumari, Yayi Wang
Summary: This article provides an overview of nitrogen-removal granular sludge (NRGS) technology, with a focus on its characterization. The integrated nitrogen transformation pathways and performance of NRGS in treating various wastewaters are discussed. NRGS properties are categorized and corresponding characterization technologies are presented. Future prospects for understanding and applying NRGS technology are proposed.
Article
Environmental Sciences
Weigang Wang, Han Wang, Zhuwu Jiang, Yayi Wang
SCIENCE OF THE TOTAL ENVIRONMENT
(2020)
Article
Engineering, Environmental
Yuan Yan, Weigang Wang, Mengxiong Wu, Mike S. M. Jetten, Jianhua Guo, Jie Ma, Han Wang, Xiaohu Dai, Yayi Wang
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2020)
Article
Environmental Sciences
Weigang Wang, Yuan Yan, Junjie Wang, Yijing Zhu, Jie Ma, Zhuwu Jiang, Yayi Wang
Article
Environmental Sciences
Toshimi Nakajima, Mao Kuragano, Makoto Yamada, Ryo Sugimoto
Summary: This study compared the contribution of submarine groundwater discharge (SGD) to river nutrient budgets at nearshore and embayment scales, and found that SGD-derived nutrients become more important at larger spatial scales.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Fan Liu, Lei Zhang, Chongyang Zhang, Ziguang Chen, Jingguang Li
Summary: NO2 emissions from wall-mounted gas stoves used for household heating have become a significant source of indoor pollution in Chinese urban areas. The high indoor concentration of NO2 poses potential health risks to residents. It is urgently necessary to establish relevant regulations and implement emission reduction technologies to reduce NO2 emissions from wall-mounted gas stoves.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Letter
Environmental Sciences
Hans Peter H. Arp, Raoul Wolf, Sarah E. Hale, Sivani Baskaran, Juliane Gluege, Martin Scheringer, Xenia Trier, Ian T. Cousins, Harrie Timmer, Roberta Hofman-Caris, Anna Lennquist, Andre D. Bannink, Gerard J. Stroomberg, Rosa M. A. Sjerps, Rosa Montes, Rosario Rodil, Jose Benito Quintana, Daniel Zahn, Herve Gallard, Tobias Mohr, Ivo Schliebner, Michael Neumann
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Philomina Onyedikachi Peter, Binessi Edouard Ifon, Francois Nkinahamira, Kayode Hassan Lasisi, Jiangwei Li, Anyi Hu, Chang-Ping Yu
Summary: This study investigates the relationship between dissolved organic matter (DOM) and Rare Earth Elements (REEs) in sediments from Yundang Lagoon, China. The results show four distinct fluorescent components, with protein-like substances being the most prevalent. Additionally, the total fluorescence intensity and LREE concentrations exhibit a synchronized increase from Outer to Inner to Songbai Lake core sediments. The findings demonstrate a strong correlation between DOM content and pollution levels.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Surya Gupta, Pasquale Borrelli, Panos Panagos, Christine Alewell
Summary: The objective of this study is to incorporate soil hydraulic properties into the erodibility factor (K) of USLE-type models. By modifying and improving the existing equations for soil texture and permeability, the study successfully included information on saturated hydraulic conductivity (Ksat) into the calculation of K factor. Using the Random Forest machine learning algorithm, two independent K factor maps with different spatial resolutions were generated. The results show that the decrease in K factor values has a positive impact on the modeling of soil erosion rates.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Jesmin Akter, Wendy J. M. Smith, Yawen Liu, Ilho Kim, Stuart L. Simpson, Phong Thai, Asja Korajkic, Warish Ahmed
Summary: The choice of workflow in wastewater surveillance has a significant impact on SARS-CoV-2 concentrations, while having minimal effects on HF183 and no effect on HAdV 40/41 concentrations. Certain components in the workflow can be interchangeable, but factors such as buffer type, chloroform, and homogenization speed can affect the recovery of viruses and bacteria.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Yu Luo, Xueting Yang, Diwei Wang, Hongmei Xu, Hongai Zhang, Shasha Huang, Qiyuan Wang, Ningning Zhang, Junji Cao, Zhenxing Shen
Summary: Atmospheric PM2.5, which can generate reactive oxygen species (ROS), is associated with cardiorespiratory morbidity and mortality. The study found that both the mass concentration of PM2.5 and the DTT activity were higher during the heating season than during the nonheating season. Combustion sources were the primary contributors to DTT activity during the heating season, while secondary formation dominated during the nonheating season. The study also revealed that biomass burning had the highest inherent oxidation potential among all sources investigated.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Erin L. Murphy, Leah R. Gerber, Chelsea M. Rochman, Beth Polidoro
Summary: Plastic pollution has devastating consequences for marine organisms. This study uses a trait-based framework to develop a vulnerability index for marine mammals, seabirds, and sea turtles in Hawai'i. The index ranks 63 study species based on their vulnerability to macroplastic pollution, providing valuable information for species monitoring and management priorities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Kenji Maurice, Amelia Bourceret, Sami Youssef, Stephane Boivin, Liam Laurent-Webb, Coraline Damasio, Hassan Boukcim, Marc-Andre Selosse, Marc Ducousso
Summary: Growing pressure from climate change and agricultural land use is destabilizing soil microbial community interactions. Little is known about microbial community resistance and adaptation to disturbances, hindering our understanding of recovery latency and implications for ecosystem functioning. This study found that anthropic disturbance and natural disturbance have different effects on the topology and stability of soil microbial networks.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Yunhao Li, Yali Feng, Haoran Li, Yisong Yao, Chenglong Xu, Jinrong Ju, Ruiyu Ma, Haoyu Wang, Shiwei Jiang
Summary: Deep-sea mining poses a serious threat to marine ecosystems and human health by disturbing sediment and transmitting metal ions through the food chain. This study developed a new regenerative adsorption material, OMN@SA, which effectively removes metal ions. The adsorption mechanism and performance of the material for metal ion fixation were investigated.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Antonio Medici, Margherita Lavorgna, Marina Isidori, Chiara Russo, Elena Orlo, Giovanni Luongo, Giovanni Di Fabio, Armando Zarrelli
Summary: Valsartan, a widely used antihypertensive drug, has been detected in high concentrations in surface waters due to its unchanged excretion and incomplete degradation in wastewater treatment plants. This study investigated the degradation of valsartan and identified 14 degradation byproducts. The acute and chronic toxicity of these byproducts were evaluated in key organisms in the freshwater trophic chain.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Jiang Lin, Lianbao Chi, Qing Yuan, Busu Li, Mingbao Feng
Summary: This study investigated the photodegradation behavior and product formation of two representative pharmaceuticals in simulated estuary water. The study found that the formed transformation products of these pharmaceuticals have potential toxicity on marine organisms, including oxidative stress and damage to cellular components.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Hua Fang, Dongdong Jiang, Ye He, Siyi Wu, Yuehong Li, Ziqi Zhang, Haoting Chen, Zixin Zheng, Yan Sun, Wenxiang Wang
Summary: This study revealed that exposure to lower levels of air pollutants led to decreased pregnancy rates, with PM10, NO2, SO2, and CO emerging as the four most prominent pollutants. Individuals aged 35 and above exhibited heightened susceptibility to pollutants.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Ali Shaan Manzoor Ghumman, Rashid Shamsuddin, Amin Abbasi, Mohaira Ahmad, Yoshiaki Yoshida, Abdul Sami, Hamad Almohamadi
Summary: In this study, inverse vulcanized polysulfides (IVP) were synthesized by reacting molten sulfur with 4-vinyl benzyl chloride, and then functionalized using N-methyl D-glucamine (NMDG). The functionalized IVP showed a high mercury adsorption capacity and a machine learning model was developed to predict the amount of mercury removed. Furthermore, the functionalized IVP can be regenerated and reused, providing a sustainable and cost-effective adsorbent.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Environmental Sciences
Rita Bonfiglio, Renata Sisto, Stefano Casciardi, Valeria Palumbo, Maria Paola Scioli, Erica Giacobbi, Francesca Servadei, Gerry Melino, Alessandro Mauriello, Manuel Scimeca
Summary: This study investigated the presence of aluminum in human colon cancer samples and its potential association with biological processes involved in cancer progression. Aluminum was found in tumor areas of 24% of patients and was associated with epithelial to mesenchymal transition (EMT) and cell death. Additional analyses revealed higher tumor mutational burden and mutations in genes related to EMT and apoptosis in aluminum-positive colon cancers. Understanding the molecular mechanisms of aluminum toxicity may improve strategies for the management of colon cancer patients.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
