Citric Acid-Enhanced Electroremediation of Toxic Metal-Contaminated Dredged Sediments: Effect of Open/Closed Orifice Condition, Electric Potential and Surfactant
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Electrokinetic remediation: Past experiences and future roadmap for sustainable remediation of metal-contaminated soils
2024, Journal of Geochemical ExplorationPurification of heavy metal chromium in saturated sand by artificial freezing: Mechanism and method optimization
2022, Research in Cold and Arid RegionsEnhanced electrokinetic remediation of heavy metals contaminated soil by biodegradable complexing agents
2021, Environmental PollutionCitation Excerpt :Various and efficient remediation for heavy metals contaminated soils is in increasing need of a sustainable social development prospect (Liu et al., 2018; Xu et al., 2019). Electrokinetic remediation (EKR) applies a direct-current electric field to the soil to remove soluble contaminants by electrochemical phenomena, such as electromigration, electroosmosis or electrophoresis, and has been regarded as a promising remediation technology in recent years (Rodrigo et al., 2014; SONG et al., 2018). To improve the efficiency of EKR, complexing agents are generally used as electrolytes or extracting solutions during pretreatment to increase metal solubility.
Removal of inorganic contaminants in soil by electrokinetic remediation technologies: A review
2021, Journal of Hazardous MaterialsCitation Excerpt :In addition, chelators can reduce the zeta potential on soil particles surface and increase the EOF (Gu et al., 2009; Yeung, 2011), which will also promote the removal of heavy metals from soil. Many studies have also shown that surfactants can enhance extractability of heavy metal in soil (Paramkusam et al., 2014; Song et al., 2018b), which means some surfactants, such as Tween 80, can enhance EKR of Co-contaminated soils with heavy metals and organic pollutants (Falciglia et al., 2017). Sodium dodecylsulfate (SDS), Triton X-100, cetyltrimethylammoium bromide (CTAB), carboxymethyl-β-cyclodextrin have been studied to enhance EK of soils contaminated by heavy metals (Wang and Brusseau, 1995; Doong et al., 1998).
Scale-up of electrokinetic process for dredged sediments remediation
2020, Electrochimica ActaCitation Excerpt :However, the obtained results from these studies could not be transposed for real multicontaminated sediments, because contaminants are much more mobile in spiked soils rather than in aged sediments. Researchers, therefore, started to test at laboratory-scale soils, sediments or wastes from contaminated sites [15–27]. Understanding contaminants behavior is more complicated when considering also lipophilic nonionic contaminants such as polycyclic aromatic hydrocarbons (PAHs) or polychlorinated biphenyls (PCBs).
EDTA-enhanced electrokinetic remediation of aged electroplating contaminated soil assisted by combining dual cation-exchange membranes and circulation methods
2020, ChemosphereCitation Excerpt :It is well known that electric current is highly related to the concentration of mobile ions in the soil matrix during an EK procedure (Acar and Alshawabkeh, 1993). Therefore, the increase in electric current at the beginning of the test was mainly due to dissolved ions from salt precipitates due to acidification (Ammami et al., 2015; Song et al., 2018). However, when the cations migrated into the alkaline zone, the high-pH condition led to re-precipitation of these substances, leading to a reduction in electroconductivity (EC) in this area (Zhou et al., 2004).