Review
Engineering, Environmental
Dongdong Wen, Rongbing Fu, Qian Li
Summary: Soil contaminated by inorganic pollutants poses risks to human health and the environment, with electrokinetic remediation (EKR) technology being widely used for cleaning contaminated sites. Efforts to establish optimal operating conditions and understand the mechanisms of EKR have not yet resulted in a comprehensive theoretical foundation.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Dongdong Wen, Xiaopin Guo, Rongbing Fu
Summary: This study comprehensively investigates the inhibition characteristics of the electrokinetic removal (EKR) of inorganic pollutants from soil due to the evolution of the acidic and alkaline fronts (EAAF). The effects and control mechanisms of EAAF on the transport of target species are systematically examined, providing insights into improving the removal efficiency of target contaminants.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Environmental
Yunlong Li, Liguo Jiang
Summary: The study investigated the efficiency of different surfactants in treating crude oil-contaminated low-permeability soil, with Tween 80 showing the highest removal rate.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(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
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
Chemistry, Multidisciplinary
Claudio Cameselle, Susana Gouveia, Adrian Cabo
Summary: The study focused on electrokinetic remediation of agricultural soil contaminated with heavy metals using organic acids as facilitating agents. EDTA and citric acid were effective in dissolving and transporting metals, with citric acid showing superior performance in the removal process.
APPLIED SCIENCES-BASEL
(2021)
Review
Environmental Sciences
Zeying Sun, Miaomiao Zhao, Li Chen, Zhiyang Gong, Junjie Hu, Degang Ma
Summary: This paper systematically summarizes the basic principles and related physical and chemical phenomena of electrokinetic remediation (EKR) technology, and proposes three limiting problems of EKR technology: weak ability of dissolving metals, focusing effect, and energy consumption. It summarizes the main ideas to solve these problems based on various enhanced EKR technologies, compares the advantages and disadvantages of each technology, which has guiding significance for the development of new technology in the future.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Yujie Yan, Zhang Ling, Wen Shu, Tao Huang, Rich Crane
Summary: A novel 3D electrokinetic remediation (3D EKR) system using FeOx/granular activated carbon (GAC) composite as a third electrode was studied for Cr removal from contaminated soil. The inclusion of third electrode particles in the soil improved the current density and reduced polarization compared to the conventional 2D EKR system. The enhanced oxidation of Cr(III) to Cr(VI) and electromigration towards the anode contributed to higher Cr removal.
CHEMICAL ENGINEERING JOURNAL
(2023)
Review
Engineering, Environmental
Jamie M. Purkis, Phil E. Warwick, James Graham, Shaun D. Hemming, Andrew B. Cundy
Summary: Electrokinetic remediation (EKR) shows high removal efficiencies in removing radionuclides from contaminated substrates, especially in low-permeability substrates. The technology has great potential for nuclear site applications and future development.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Review
Biochemistry & Molecular Biology
Szymon Smolka, Katarzyna Krukiewicz
Summary: Recent studies have shown that electrochemical grafting of diazonium salts is an efficient method for forming heterogeneous catalysts. This review aims to evaluate the industrial applicability of diazonium-based catalysts, focusing on their mechanical, chemical, and thermal stability. Various approaches to catalyst production using diazonium salt chemistry have been compared, and the most common deactivation routes of catalysts have been discussed. However, more research is needed to experimentally verify the stability and long-term catalytic performance of diazonium-based catalysts.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2023)
Article
Environmental Sciences
Nieves Garcia-Blas, Eva Jimenez-Relinque, Marta Castellote
Summary: This study found that surfactants can help with metal solubilization, but their effect depends on the type of metal. Each metal has a unique optimal species combination in the enhancing electrolyte. The direction of the electroosmotic flow is determined by the chemical conditions of the system as a whole, not by the type of surfactant. Surfactants in combination with citric acid (CA) and ethylenediaminetetraacetic acid (EDTA) can improve desorption in general, which is attributed to an increase in charge density passed during the tests rather than a symbiotic enhancement between both types of enhancing solutions.
JOURNAL OF SOILS AND SEDIMENTS
(2022)
Article
Green & Sustainable Science & Technology
Qiang Liu, Qing Zhang, Shiqi Jiang, Zhongcheng Du, Xiaolei Zhang, Huihui Chen, Weiming Cao, Long D. Nghiem, Huu Hao Ngo
Summary: This study investigated the release of dissolved organic matters (DOMs) from biochar under a DC electric field and their effect on the removal of lead (Pb) from soil through electrokinetic (EK) remediation. The results showed that biochar released more DOMs under the DC field, with biochar obtained at 300 degrees C releasing the most DOMs. The major component of the released DOMs was humic-like substances, which had a strong ability to complex with Pb and extract it from the soil matrix. Using biochar as a permeable reactive barrier (PRB) combined with EK significantly improved the migration rates and removal of Pb from the soil. This study provides important insights into the use of biochar for sustainable EK remediation of soil contaminated with heavy metals.
JOURNAL OF CLEANER PRODUCTION
(2022)
Article
Environmental Sciences
Jian Tang, Zhongping Qiu, Hengjun Tang, Haiyue Wang, Weiping Sima, Chao Liang, Yi Liao, Zhihua Li, Shan Wan, Jianwei Dong
Summary: In this study, a novel technology was applied to remove heavy metals from sludge, with the coupled EDDS and AA-EK technique showing enhanced efficiency. The results indicated that the technique led to increased electric current and predominant heavy metal removal, demonstrating its effectiveness in electrokinetic remediation.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Yan Song, Cheng Lei, Kun Yang, Daohui Lin
Summary: The study combined electrokinetic and iron-carbon material for soil remediation, finding that the EK-Fe/C system showed a high efficiency in removing PCB28, primarily due to the enhanced Fenton reaction by EK and Fe/C. Other oxidation and reduction processes also contributed to the removal of PCB28 in the EK-Fe/C system.
ENVIRONMENTAL POLLUTION
(2021)
Review
Chemistry, Multidisciplinary
Chao Wang, Youxun Xu, Junwang Tang
Summary: A large reserve of methane has been discovered and intensively used, but the environmental and climatic issues caused by its leakage are overlooked. This review focuses on the catalytic removal of methane, which requires harsh conditions due to its inert nature. Photocatalysis offers an alternative approach to methane removal. The development of high-efficiency catalysts, active sites, surface chemistry, reaction pathways, challenges, and potential solutions are discussed, which is of interest to researchers in the field of heterogeneous catalysis, materials design, and chemical engineering.
SCIENCE CHINA-CHEMISTRY
(2023)
Article
Engineering, Chemical
Jiuyang Lin, Chuyang Y. Tang, Wenyuan Ye, Shi-Peng Sun, Shadi H. Hamdan, Alexander Volodin, Chris Van Haesendonck, Arcadio Sotto, Patricia Luis, Bart Van der Bruggen
JOURNAL OF MEMBRANE SCIENCE
(2015)