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- W4220988813 abstract "• The performance of the PCPSS was enhanced using the Taguchi approach (L 9 OA). • Ni was selected as a target heavy metal to maximize the performance of PCPSS. • The effects of chelating agent, applied voltage, and Ni concentration on the performance of PCPSS were studied. • Confirmation experiments were conducted on real soil contaminated with heavy metals. • The simultaneous removal of heavy metals, cations, and anions was investigated. Recently, we have developed a new soil electrokinetic remediation (SEKR) process, hereinafter referred to as the perforated cathode pipe SEKR system (PCPSS), to achieve remediation intensification. Some obstacles, such as the low removal of some heavy metals, particularly Ni, limited our previous PCPCS. We aim to improve the removal efficiency of the PCPSS by adding a chelating agent (i.e., ethylenediaminetetraacetic acid (EDTA)). Given the unsatisfactory remediation results obtained in our previous studies, the Taguchi approach (L 9 OA) was exploited in this work as an experimental design to determine the optimal level of factors that could enhance Ni removal. Results showed that an electric potential of 3 V, addition of 0.5 mol of EDTA, and an initial Ni concentration in the range of 10–20 mg kg −1 could optimize Ni removal. Confirmation experiments conducted on natural contaminated soil showed the following order of removal of heavy metals and other elements: Al (70%) > Co (69%) > Fe (63.5%) > Cu (55%) > Mn (52.8%) > Zn (43.17%) > Cr (41.41%) > Ni (22.26%). Among the studied soil cations, Mg showed the best removal rate, Ba showed moderate removal rate, and Ca showed the lowest removal rate. Notably, the removal rate of V was much higher than that of born (B)." @default.
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- W4220988813 date "2022-05-01" @default.
- W4220988813 modified "2023-09-26" @default.
- W4220988813 title "Enhancement of the electrokinetic removal of heavy metals, cations, anions, and other elements from soil by integrating PCPSS and a chelating agent" @default.
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- W4220988813 doi "https://doi.org/10.1016/j.jtice.2022.104306" @default.
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