Trichloroethylene remediation using zero-valent iron with kaolin clay, activated carbon and bacteria

Zhu, Jiayan; Zhang, Lishan; Liu, Junyong; Zhong, Shengwen; Gao, Pin; Shen, Jinyou

doi:10.1016/j.watres.2022.119186

Cited by 25 publications

(7 citation statements)

References 82 publications

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“…were added to stabilize the iron nanoparticles and to prevent their loss. This reactive barrier’s trichloroethylene removal rate exceeded 94% for over 365 days [ 27 ]. Xu et al synthesized green kaolin@Fe–Mn binary (hydro)oxides, including iron-oxidizing bacteria composites that possessed a large specific surface area and pore volume as well as an abundance of functional groups, for antimony and arsenic pollution removal.…”

Section: Resultsmentioning

confidence: 99%

The Performance of a Modified Anode Using a Combination of Kaolin and Graphite Nanoparticles in Microbial Fuel Cells

Hirsch,

Gandu,

Chiliveru

et al. 2024

Microorganisms

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The bacterial anode in microbial fuel cells was modified by increasing the biofilm’s adhesion to the anode material using kaolin and graphite nanoparticles. The MFCs were inoculated with G. sulfurreducens, kaolin (12.5 g·L−1), and three different concentrations of graphite (0.25, 1.25, and 2.5 g·L−1). The modified anode with the graphite nanoparticles (1.25 g·L−1) showed the highest electroactivity and biofilm viability. A potential of 0.59, 0.45, and 0.23 V and a power density of 0.54 W·m−2, 0.3 W·m−2, and 0.2 W·m−2 were obtained by the MFCs based on kaolin–graphite nanoparticles, kaolin, and bare anodes, respectively. The kaolin–graphite anode exhibited the highest Coulombic efficiency (21%) compared with the kaolin (17%) and the bare (14%) anodes. Scanning electron microscopy and confocal laser scanning microscopy revealed a large amount of biofilm on the kaolin–graphite anode. We assume that the graphite nanoparticles increased the charge transfer between the bacteria that are in the biofilm and are far from the anode material. The addition of kaolin and graphite nanoparticles increased the attachment of several bacteria. Thus, for MFCs that are fed with wastewater, the modified anode should be prepared with a pure culture of G. sulfurreducens before adding wastewater that includes non-exoelectrogenic bacteria.

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Section: Resultsmentioning

confidence: 99%

The Performance of a Modified Anode Using a Combination of Kaolin and Graphite Nanoparticles in Microbial Fuel Cells

Hirsch,

Gandu,

Chiliveru

et al. 2024

Microorganisms

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“…(BAO, et al [59]). Although promising, this process brings direct and indirect effects, the direct effects are the ionization of the target compound, and indirectly the radiolysis of the solvent merges with the target compounds (KANG, et al [60,61]), to form a chemical transformation. A pertinent discussion about atoms and molecules is regarding the construction of their electric charges of electrons and their nuclei.…”

Section: Groundwater Remediation and Treatment Techniquesmentioning

confidence: 99%

Groundwater and Anthropic Activities: A Qualitative Study on Treatment Techniques

Oliveira

2024

BJSTR

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The hydrological water cycle comprises constant water movements, which have great influence on the maintenance of vital natural activities. Groundwater in particular constitutes a portion of aquifers, which are considered mobile reservoirs used mainly as a source of supply and human consumption. However, external influences have become largely responsible for the unbalance of the ecosystem, linked to the unbridled human consumption of finite natural resources and the consequent discharge of waste into the receiving bodies without the necessary treatment. The geological water cycle is interrupted when forests are cut down, springs and rivers are extinguished, and together with this, finally, the lack of basic sanitation alters the ecosystem, causing changes of great relevance to the world's population. Groundwater has suffered relevant impacts due to the loss of biodiversity of ecosystems, such as contamination, overuse, lack of current regulatory legislation for use, and the improvement of decontamination techniques. The analysis of the following activities is necessary, mainly due to the anthropic punctual impacts to the ecosystem, corroborating the need for satisfactory techniques. It is noticeable the need for extreme attention to the waste runoff via sanitary sewage to places that have treatment, but the same is not very efficient in retaining this liability, since some developing countries that have not reached about 90% treatment of sanitary sewage, demonstrating the lack of such activities. Thus, the objective of this study is to verify, by means of exploratory and bibliographic research in research bases, the measures that protect the water. Technological measures and sustainable management tools for this purpose will be reviewed, as well as the evolution of groundwater treatment techniques.

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“…Permeable reactive barrier (PRB) has unparalleled advantages in preventing further spread of pollution and protecting important areas, compared with common groundwater remediation technologies such as pumping treatment, biological ventilation, and chemical oxidation [6][7][8] . Well-designed PRB systems have also been shown to reduce costs and maintain long-term operations from some reports [9][10][11] . However, some PRB systems still do not meet their intended purposes, and these failures may be caused by insufficient reactive materials, insufficient widths or thicknesses of PRB, and reduced porosity [5,12] .…”

Section: Introductionmentioning

confidence: 99%

Design of Permeable Reactive Barrier for Petroleum Polluted Groundwater

Ren,

Zhou,

Sun

et al. 2024

Preprint

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Groundwater pollution caused by oil spill accidents has been reported occasionally, and the groundwater remediation of petroleum hydrocarbons is an important research direction. In the process of in-situ groundwater remediation, a permeable reactive barrier can effectively prevent the spread of contamination plume. However, selecting the optimal material and estimating the width remains critical and challenging problems in the design of permeable reactive barrier. Meanwhile, the site environment is also an important part to consider. In this study, aimed at the oil pollution site of a military base in South Korea, the best adsorption material was determined through batch and column experiments, and a PRB with the best width in line with the service life was designed through various design methods. In the width design, based on the material balance equation, the method of using the width of the material transport area is innovated.

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Trichloroethylene remediation using zero-valent iron with kaolin clay, activated carbon and bacteria

Cited by 25 publications

References 82 publications

The Performance of a Modified Anode Using a Combination of Kaolin and Graphite Nanoparticles in Microbial Fuel Cells

The Performance of a Modified Anode Using a Combination of Kaolin and Graphite Nanoparticles in Microbial Fuel Cells

Groundwater and Anthropic Activities: A Qualitative Study on Treatment Techniques

Design of Permeable Reactive Barrier for Petroleum Polluted Groundwater

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