title: Enhanced phytoremediation potential of polychlorinated biphenyl contaminated soil from e-waste recycling area in the presence of randomly methylated-beta-cyclodextrins.
abstract: The crude recycling of electronic and electric waste (e-waste) is now creating soil pollution problems with organic compounds such as polychlorinated biphenyls (PCBs). The present study aimed to compare the phytoremediation potential of four plant species (rice, alfalfa, ryegrass and tall fescue) for PCBs contaminated soil from Taizhou city, one of the largest e-waste recycling centers in China. In addition, the enhanced effects of randomly methylated-beta-cyclodextrins (RAMEB) on PCBs phytoremediation potential were evaluated. Higher PCBs removal percentages of 25.6-28.5% in rhizosphere soil were observed after 120 days, compared with those of the non-rhizosphere (10.4-16.9%) and unplanted controls (7.3%). The average PCBs removal percentages of four plant species increased from 26.9% to 37.1% in the rhizosphere soil with addition of RAMEB. Meanwhile, relatively high microbial counts and dehydrogenase activity were detected in planted soils and a stimulatory effect by RAMEB addition was found. The present study indicated that all the plant candidates were feasible for phytoremediation of PCBs contaminated soil from the e-waste recycling area, and tall fescue with RAMEB amendment seemed as a promising remediation strategy. High PCBs removal percentage was due to the increased PCBs bioavailability as well as biostimulation of microbial communities after plantation and RAMEB addition.
authors.affiliation: Institute of Environmental Science and Technology, Zhejiang University, Hangzhou 310029, PR China.
authors.forename: Chaofeng
authors.initials: C
authors.lastname: Shen
authors.forename: Xianjin
authors.initials: X
authors.lastname: Tang
authors.forename: Sardar Alam
authors.initials: SA
authors.lastname: Cheema
authors.forename: Congkai
authors.initials: C
authors.lastname: Zhang
authors.forename: Muhammad Imran
authors.initials: MI
authors.lastname: Khan
authors.forename: Fang
authors.initials: F
authors.lastname: Liang
authors.forename: Xincai
authors.initials: X
authors.lastname: Chen
authors.forename: Youfeng
authors.initials: Y
authors.lastname: Zhu
authors.forename: Qi
authors.initials: Q
authors.lastname: Lin
authors.forename: Yingxu
authors.initials: Y
authors.lastname: Chen
mesh_terms: D001673:Biodegradation, Environmental / Q000187:drug effects*; D002681:China; D003247:Conservation of Natural Resources / Q000639:trends; D004581:Electronics; D007220:Industrial Waste; D008129:Lolium; D000455:Medicago sativa; D012275:Oryza; D006109:Poaceae; D011078:Polychlorinated Biphenyls / Q000302:isolation & purification / Q000493:pharmacokinetics*; D012989:Soil Pollutants / Q000493:pharmacokinetics*; D047392:beta-Cyclodextrins / Q000494:pharmacology*
chemical_list: D007220:Industrial Waste; D012989:Soil Pollutants; D047392:beta-Cyclodextrins; D011078:Polychlorinated Biphenyls