Article
Engineering, Environmental
Ernestina Hauptfeld, Jordi Pelkmans, Terry T. Huisman, Armin Anocic, Basten L. Snoek, F. A. Bastiaan von Meijenfeldt, Jan Gerritse, Johan van Leeuwen, Gert Leurink, Arie van Lit, Ruud van Uffelen, Margot C. Koster, Bas E. Dutilh
Summary: Biodegradation is a sustainable and cost-effective solution for groundwater pollution. In this study, the microbial populations involved in the biodegradation of poly-contaminants in a heavily contaminated groundwater pipeline were investigated. The microbial communities were analyzed using genome-resolved metagenomic analysis, revealing the changing microbial communities in a highly effective groundwater treatment system.
Article
Engineering, Environmental
Ernestina Hauptfeld, Jordi Pelkmans, Terry T. Huisman, Armin Anocic, Basten L. Snoek, F. A. Bastiaan von Meijenfeldt, Jan Gerritse, Johan van Leeuwen, Gert Leurink, Arie van Lit, Ruud van Uffelen, Margot C. Koster, Bas E. Dutilh
Summary: This study investigates the microbial communities involved in the biodegradation of poly-contaminants in a groundwater treatment system. The genome-resolved metagenomic analysis revealed significant differences in microbial populations between the plant and the contaminated park groundwater. The findings provide valuable insights into the efficacy of microbial biodegradation in treating complex groundwater contaminants.
Article
Engineering, Environmental
Yi-Hao Luo, Chen Zhou, Yuqiang Bi, Xiangxing Long, Boya Wang, Youneng Tang, Rosa Krajmalnik-Brown, Bruce E. Rittmann
Summary: The study investigated the co-reduction of 1,1,1-TCA and TCE using PdNP catalysts deposited on H-2-transfer membranes, achieving high catalytic activity and stability with effective reduction of contaminant concentrations to non-toxic ethane as the main product.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Environmental
Yi-Hao Luo, Xiangxing Long, Boya Wang, Chen Zhou, Youneng Tang, Rosa Krajmalnik-Brown, Bruce E. Rittmann
Summary: The study utilized a synergistic platform technology to catalyze the reduction of 1,1,1-TCA and TCE in the H-2-MPfR, followed by aerobic biodegradation in the O-2-MBfR, achieving efficient removal of co-contaminants of 1,4-dioxane, 1,1,1-TCA, and TCE in groundwater.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Review
Environmental Sciences
Shixuan Liu, Tianyuan Zheng, Yongxia Li, Xilai Zheng
Summary: With the increase of nitrogen input, groundwater contamination has become a global issue with significant impact on the environment and human health. Current research on controlling groundwater nitrogen contamination focuses only on indicator changes, unable to comprehend the cause and subsequent development of the contamination, posing challenges for environmental management.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Review
Environmental Sciences
Huan Shen, Yong Huang, Yue Su
Summary: This article reviews and compares the application of PRBs for the removal of dissolved oil contaminants in groundwater, highlighting research gaps. By focusing on factors such as structure design, media types, and hydrochemical conditions, a detailed analysis of oil contamination remediation is conducted.
WATER AND ENVIRONMENT JOURNAL
(2022)
Article
Engineering, Environmental
Bing Wang, Yuzhu Zhang, Chunyang Gao, Xianyuan Du, Tongxu Qu
Summary: Organic-contaminated groundwater presents a growing threat to the environment and human health. Permeable reactive barriers (PRBs) have emerged as a popular method for degrading groundwater pollutants due to their cost-effective and sustainable advantages. However, conventional PRBs using active materials suffer from deactivation and rapid consumption. As an alternative, slow-release materials can be utilized as PRB fillers to treat contaminated groundwater, benefiting from their prolonged chemical release time.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Biochemistry & Molecular Biology
Jing Ye, Yacen Mao, Liang Meng, Junjie Li, Xilin Li, Lishan Xiao, Ying Zhang, Fenghua Wang, Huan Deng
Summary: In this study, a novel composite (nZVI@PBC) consisting of nanoscale zero-valent iron supported by polycaprolactone-modified biochar was synthesized to address the pollution problem of 1,1,1-trichloroethane (1,1,1-TCA) in groundwater. The composite coupled with Shewanella putrefaciens CN32 exhibited excellent removal performance for 1,1,1-TCA, with a removal rate of 82.98% within 360 h. The major improvement mechanisms include the nZVI-mediated chemical reductive dechlorination and the CN32-mediated microbial dissimilatory iron reduction.
Article
Environmental Sciences
Jinyi Qin, Jiao Fang, Fei Gao, Yiwen He, Ming Su, Yu Zhang, Min Yang
Summary: This study investigated the treatment of Ethinyl Estradiol (EE2) in swine wastewater using an Upstream Solids Reactor (USR), and proposed a new method for bio-feeding regulation to enhance the anaerobic biodegradation process. The addition of propionic acid was found to be more effective in enhancing the removal of EE2 compared to lactic acid. However, controlling the pH at extreme values hindered the fermentation process and negatively affected EE2 removal. The study provides insights into the anaerobic biodegradation of EE2 and suggests a new strategy for the bioremediation of refractory pollutants.
Review
Environmental Sciences
Luzi Yuan, Kun Wang, Qingliang Zhao, Lin Yang, Guangzhi Wang, Miao Jiang, Lili Li
Summary: Groundwater, an important component of water resources, can be contaminated by the mixed pollutants comprising heavy metals and petroleum hydrocarbons from industrial activities. This study discussed the application of bioremediation and permeable reactive barriers (PRBs) for in situ remediation of complex contaminated groundwater, highlighting the media types, technology combinations, and factors for the PRBs. Insights and outlooks were presented for the in situ remediation of complex groundwater contaminated with heavy metals and petroleum hydrocarbons.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2024)
Article
Environmental Sciences
Bekir Fatih Kahraman, Ahmet Altin, Nizamettin Ozdogan
Summary: The effectiveness of the nano/bio process as a remediation option for co-contaminated soils was investigated. The use of nanoscale zero-valent iron (nZVI) and bioremediation approaches effectively reduced the mobility, bioavailability, and toxicity of lead in the soil. Additionally, the nano/bio process significantly enhanced the biodegradation of alkanes in the co-contaminated soils.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Tengyu Zhang, Jingxin Zhang, Pengshuai Zhang, Jiabin Wang, Yiliang He
Summary: This study demonstrates that under limited substrate conditions, Fe-driven electronic bifurcation (EB) in anaerobic digestion (AD) leads to a 40% increase in specific methane production and contributes to 25% ATP accumulation. Iron enhances electron transport in EB by accelerating the activity of flavin, Fe-S clusters, and quinone groups. The potential of EB to accumulate energy and enhance productivity in AD systems has been investigated, and a strategy of strengthening anaerobic digestion capacity of iron-driven multi-EB in a restricted environment is proposed.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
Benjamin Heckel, Martin Elsner
Summary: This study investigates the mechanisms of natural reductive dechlorination by microorganisms of chlorinated alkanes using cobamide as a cofactor. The findings demonstrate the involvement of chloroalkyl-cobalamin complexes and a nucleophilic substitution reaction. Isotope analysis of different enzymes (RDases) shows a diversity of biochemical reaction mechanisms. This study provides important information for understanding bacterial reductive dehalogenation and bioremediation.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Environmental Sciences
Ivan Radelyuk, Mehran Naseri-Rad, Hossein Hashemi, Magnus Persson, Ronny Berndtsson, Madeniyet Yelubay, Kamshat Tussupova
Summary: This study introduces a method for assessing the potential impact of groundwater contamination by total petroleum hydrocarbons (TPH) in data-scarce regions, utilizing groundwater modeling and contamination transport modeling. Through sensitivity analysis, parameters related to the dispersivity and spreading of TPH plume were identified as priority subjects for future investigations.
ENVIRONMENTAL EARTH SCIENCES
(2021)
Article
Engineering, Environmental
Xinyu Cen, Anna Bondo Medhus, Theis Raaschou Andersen, Soren Erbs Poulsen, Mo Xu, Zishen Mou, Feng Du
Summary: Historically, industries were located in harbour areas for convenient transportation access, but now transforming these areas into living spaces faces challenges of soil contamination. Detailed information about contaminant types is crucial for addressing the issues and ensuring public safety.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2021)