Behavior of V, Cr, Li, and Ba during electrokinetic pollutant removal: Comparison of PCPSS and VA-PCPSS

Ahmed M. Abou-Shady , Doaa T. Eissa, Osama M. Abdelmottaleb, Rehab H. Hegab

Soil pollution with heavy metals is considered a serious issue affect human, animal, and plant. Owing to the deficiency of water supply in arid and semi-arid areas wastewater may be used in agricultural sector without carrying out the appropriate remediation that may increase pollutants content. Recently, we have introduced a new variation of soil electrokinetic remediation (SEKR) known as vertical anode-perforated cathode pipe SEKR system (VA-PCPSS) to overcome obstacles found in the regular PCPSS design. In the present study, the behavior of associated elements existed in anionic and cationic forms such as vanadium (V), chromium (Cr), Lithium (Li), and barium (Ba) during electro-remediation using the PCPSS and the VA-PCPSS techniques was investigated. The results indicated that, the VA-PCPSS did not affect negatively on vanadium distribution throughout soil specimen compared with sever accumulation adjacent to horizontal anode in the PCPSS design. Chromium showed the same behaviors of vanadium during SEKR of heavy metals. Lithium accumulated in the middle of specimen in either the PCPSS or the VA-PCPSS. Barium removal was 50% in the zone adjacent to anode, however sever removal was observed in the subsequent layers of the PCPSS. The application of the VA-PCPSS decreased the removed barium throughout soil, however it accumulated in the zone adjacent to specimen surface.


Keywords: Soil electrokinetic; Pollution; Remediation; PCPSS; VA-PCPSS