The effects of sewage sludge and sewage sludge biochar on PAHs and potentially toxic element bioaccumulation in Cucumis sativa L

Chemosphere
Muhammad WaqasCai Chao

Abstract

The presence of contaminants such as polycyclic aromatic hydrocarbons (PAHs) and potentially toxic elements (PTEs), including As, Cd, Cu, Pb and Zn, restricts the application of sewage sludge (SS) to agricultural land. This research established that the conversion of SS to SS biochar (SSBC) significantly (p ≤ 0.01) decreased PAH and available PTE concentrations. Once added to soil both SS and SSBC significantly (p ≤ 0.05) decrease PAH availability. Bioaccumulation of PAHs into Cucumis sativa L. was reduced by both SSBC (44-57%) and (to a lesser extent 20-36%) by SS. Following addition to soil SSBC significantly (p ≤ 0.05) reduced available PTEs (except Cd), while SS significantly (p ≤ 0.05) increased PTE availability. As a consequence SSBC significantly (p ≤ 0.05) reduced PTE bioaccumulation (except Cd and Zn), while SS increased PTE bioaccumulation. These results suggest SSBC to be a candidate for soil amendment that offers advantages over SS in terms of PAH/PTE bioaccumulation mitigation.

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Citations

Feb 5, 2016·Environmental Monitoring and Assessment·Abdelhamid CherfiSid-Ahmed Rezzoug
Jan 7, 2016·Chemosphere·Marcin KuśmierzSylwia Andruszczak
Sep 27, 2015·Environmental Science and Pollution Research International·Hailu WuBin Gao
Apr 8, 2016·The Science of the Total Environment·Fuxia PanHuaiying Yao
Aug 26, 2014·The Science of the Total Environment·Muhammad WaqasKifayatullah Khan
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Aug 16, 2016·Journal of Hazardous Materials·Juan Zhang, Shu-Kai Fan
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Feb 6, 2019·Environmental Science and Pollution Research International·Qianqian ShaoGenxing Pan
Aug 26, 2019·Environmental Science and Pollution Research International·Yiyun LiuYuebing Sun
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