Article
Environmental Sciences
Qiyuan Lu, Weimin Zhang, Xia Xiong, Yadan Guo, Dandan Huang, Haiyan Liu
Summary: Hydroxyapatite-coated quartz sands were successfully synthesized and used as a permeable reactive barrier (PRB) medium for removing manganese from contaminated water. The study investigated the effects of particle size, initial concentration of manganese, and hydraulic load on manganese removal. The results showed that the initial concentration of manganese had the greatest impact on Mn(II) removal. The adsorption mechanisms were mainly ion exchange and dissolution-precipitation. The hydroxyapatite-coated quartz sands proved to be an effective medium for treating manganese-contaminated water.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Altantsetseg Buyanjargal, Jiyoung Kang, Brent E. Sleep, Sung-Wook Jeen
Summary: This study conducted laboratory column experiments for sequential treatment of nitrate and phosphate in groundwater, showcasing the effectiveness of a permeable reactive barrier system consisting of woodchips and basic oxygen furnace slag. The results demonstrated successful removal of nitrate through denitrification and phosphate through precipitation of phosphate minerals. Additionally, concerns regarding high pH in the effluent water were addressed by passing it through local soil, ultimately providing a long-term remedial solution for nitrate and phosphate contamination in groundwater.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Review
Environmental Sciences
Rahul Singh, Sumedha Chakma, Volker Birke
Summary: Permeable reactive barriers (PRBs) are effective technologies for treating contaminated groundwater and have been widely used worldwide. This study provides a comprehensive overview of different PRB designs and their long-term performance, helping stakeholders understand the implications of PRBs and guide their application to avoid potential failure.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Namuun Ganbat, Faris M. Hamdi, Ibrar Ibrar, Ali Altaee, Lilyan Alsaka, Akshaya K. Samal, John Zhou, Alaa H. Hawari
Summary: This study evaluated the feasibility of using iron slag PRB enhanced-EK process with NaC biosurfactant for removing PFOA from soil. The results showed that the PFOA removal rate could be increased to 94.09% by extending the testing duration and using NaC enhancement. This study confirms the sustainable approach of utilizing iron slag waste in the EK process for capturing PFOA contaminants.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Engineering, Environmental
Haidong Zhou, Zhiyong Liu, Xin Li, Jiahui Xu
Summary: A new technique using SAE/EK-PRB was effective in removing Pb2+ from contaminated soil, with 35% moisture content and 2.5 V/cm voltage gradient as the optimal operating conditions. Different PRB filling materials were evaluated, showing that a combination of fly ash and graphene oxide was the most successful in reducing Pb2+ levels in the soil.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Chiquan He, Anni Hu, Feifei Wang, Pu Zhang, Zhenzhen Zhao, Yanping Zhao, Xiaoyan Liu
Summary: The study investigated the remediation of heavy metal contaminated soils using a new sheet PRB material, as well as the impact of citric acid and Shewanella oneidensis pretreatment on the removal efficiency of zinc and cadmium. The results showed that the CA + MR-1 group exhibited the highest removal efficiency and adsorption capacity for Zn(II) and Cd(II) during EK-PRB treatment.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Kaixuan Zheng, Xingshen Luo, Yiqi Tan, Zhonglei Li, Hongtao Wang, Tan Chen, Li Zhao, Liangtong Zhan
Summary: A novel permeable reactive barrier (PRB) configuration, called passive convergence-permeable reactive barrier (PC-PRB), is proposed to overcome the shortcomings of traditional PRB configurations. The study shows that PC-PRB has better hydraulic performance than the continuous reactive barrier (C-PRB), reducing the geometric dimensions and material costs required for treating the same plume. The sensitivity analysis identifies the key factors influencing the hydraulic performance of PC-PRB. Therefore, PC-PRB is an effective PRB configuration.
FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING
(2022)
Article
Environmental Sciences
Chengchen Guo, Liang Qi, Ying Bai, Lin Yin, Ling Li, Wen Zhang
Summary: The study demonstrates that the PRB filled with ZVI modified wheat straw materials shows good performance in removing nitrate-contaminated groundwater, achieving high NO3- removal rate and low NH4+ generation, making it suitable for remediation in field-scale PRBs.
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2021)
Article
Engineering, Environmental
S. Maldonado, R. Lopez-Vizcaino, M. A. Rodrigo, P. Canizares, V Navarro, G. Roa, C. Barrera, C. Saez
Summary: The study shows that the PRB-EKSF process mainly relies on electrokinetic transport and dehalogenation for treating contaminated soil, while the adsorption on GAC is not as crucial as expected. In the pilot scale, a significant amount of clopyralid remained in the soil after treatment, and the transport of volatile compounds into the atmosphere was promoted.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Fuxin Zheng, Yuanzheng Zhai, Weifeng Yue, Yanguo Teng
Summary: A coupling model was used to predict the uranium degradation in a combined remediation system, and it was found that the field electric direction and flow field strength were key factors affecting the system performance. The coupling model can be utilized to design standard systems for uranium-contaminated groundwater.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2023)
Article
Engineering, Geological
Cuicui Liu, Yue Ma, Steven A. Banwart, Xiaohui Chen, Wenchao Du, Ying Yin, Hongyan Guo
Summary: A one-dimensional reactive transport model was developed to study the removal of phenanthrene from groundwater using new PRB materials A and B. The results showed that Material B had a higher removal efficiency than Material A due to its higher adsorption capacity and microbial yield coefficient. The findings are of significance for practical applications in groundwater remediation.
JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING
(2022)
Article
Engineering, Environmental
Jing Wang, Li'an Hou, Zhikan Yao, Yonghai Jiang, Beidou Xi, Shiying Ni, Lin Zhang
Summary: In this study, aminated electrospun nanofiber membrane (ENFM) with high Cr(VI) adsorption capacity and regenerability was successfully synthesized and demonstrated to be effective in the remediation of Cr(VI) contaminated soil.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Biotechnology & Applied Microbiology
Qiang Liu, Yuyu Jiang, Yangyang Liu, Xiaolei Zhang, Yunfeng Xu, Huihui Chen, Weimin Cao
Summary: Coconut shell biochars prepared from oxygen-free pyrolysis were used in a permeable reactive barrier (PRB) for electrokinetic remediation (EK) to remove 2,4,6-trichlorophenol (2,4,6-TCP) from soil. The addition of biochar to the PRB significantly increased the removal of 2,4,6-TCP compared to PRB without biochar. The voltage input was found to be the major factor influencing the TCP removal during the EK-PRB process. The optimal conditions for TCP removal were found to be 2 V cm-1 voltage, 700 degrees C pyrolysis temperature, and 40 mg L-1 initial TCP concentration. The biochar played multiple roles in EK remediation, including enhancing electroosmotic flow, adsorbing TCP, and promoting electrochemical degradation. Biochar from high pyrolysis temperature was particularly effective in enhancing electroosmotic flow and pollutant adsorption.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2022)
Article
Environmental Sciences
Mengwei Li, Haidong Zhou, Yadan Wangjin, Mixuan Ye, Xinxuan Xu, Xin Li
Summary: Yeast was used to prepare a permeable reactive barrier (PRB) with immobilized microbial technology to remediate Cd-contaminated soil. The effect of different PRBs on Cd removal was explored, and it was found that the voltage gradient had an influence on the removal efficiency. The use of fly ash-based yeast pellets in the immobilized yeast PRB (IMEK-PRB) significantly increased the average removal of Cd by more than 10%.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Haijian Xie, Mengzhen Yu, Huaxiang Yan, Hywel Rhys Thomas, Yunmin Chen, Yun Chen
Summary: A permeable reactive barrier (PRB) is an effective technology for groundwater remediation, and its design methods are crucial for achieving remediation goals. Steady-state analytical solutions offer a conservative and simple approach to PRB design. This study proposes a steady-state analytical solution to describe organic contaminant transport through a PRB and aquifer system. The shape factor is introduced to investigate the impact of PRB layout on its performance. Dimensionless analysis is used to examine the effects of degradation, dispersion, and advection on PRB design. Simplified solutions for estimating PRB thickness and source remediation time are derived. These findings provide practical insights for the design and evaluation of PRB systems.
JOURNAL OF ENVIRONMENTAL ENGINEERING
(2023)
Article
Engineering, Geological
R. Pakzad, S. Y. Wang, S. W. Sloan
ROCK MECHANICS AND ROCK ENGINEERING
(2018)
Article
Engineering, Environmental
Qianqian Cai, Brett D. Turner, Daichao Sheng, Scott Sloan
Article
Engineering, Geological
Xinyu Ye, Qiong Wang, Shanyong Wang, Scott Sloan, Daichao Sheng
Article
Engineering, Geological
Ramin Pakzad, Shanyong Wang, Scott Sloan
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2018)
Article
Engineering, Geological
Jinsong Huang, Dong Zheng, Dian-Qing Li, Richard Kelly, Scott William Sloan
CANADIAN GEOTECHNICAL JOURNAL
(2018)
Editorial Material
Computer Science, Interdisciplinary Applications
Alexander M. Lester, Scott W. Sloan
COMPUTERS AND GEOTECHNICS
(2019)
Article
Engineering, Geological
Gaopeng Tang, Jinsong Huang, Daichao Sheng, Scott William Sloan
ENGINEERING GEOLOGY
(2018)
Article
Engineering, Geological
Xinyu Ye, Shanyong Wang, Qiong Wang, Scott William Sloan, Daichao Sheng
Article
Engineering, Multidisciplinary
Ding Chen, Wenxiong Huang, Scott W. Sloan
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2019)
Article
Computer Science, Interdisciplinary Applications
Zihao Zhao, George Kouretzis, Scott William Sloan, Yufeng Gao
COMPUTERS AND GEOTECHNICS
(2019)
Article
Computer Science, Interdisciplinary Applications
Alexander M. Lester, George P. Kouretzis, Scott W. Sloan
COMPUTERS AND GEOTECHNICS
(2019)
Article
Engineering, Geological
Xinyu Ye, Shanyong Wang, Xiong Xiao, Scott Sloan, Daichao Sheng
INTERNATIONAL JOURNAL OF GEOMECHANICS
(2019)
Article
Environmental Sciences
Brett D. Turner, Scott W. Sloan, Glenn R. Currell
Article
Environmental Sciences
B. D. Turner, M. Spadari
Summary: This study demonstrates the evaluation of various binders for the solidification of organotin contaminated estuarine sediments, and simulates the long-term leachability of organotins using the amendment of organic content. The results show that the binder amended with hemp performs the best in terms of leachability of organotins, significantly below the maximum limit set by relevant guidelines.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Geological
Klaus Thoeni, Martin Servin, Scott W. Sloan, Anna Giacomini
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2019)