TY - JOUR
T1 - Vertical profile of soil/sediment pollution and microbial community change by e-waste recycling operation
AU - Wu, Qihang
AU - Du, Yongming
AU - Huang, Zhuying
AU - Gu, Jidong
AU - Leung, Jonathan Y.S.
AU - Mai, Bixian
AU - Xiao, Tangfu
AU - Liu, Wen
AU - Fu, Jie
N1 - Publisher Copyright:
© 2019
PY - 2019/6/15
Y1 - 2019/6/15
N2 - The present study aims to assess the effect of electronic waste (e-waste) recycling on microbial community and the underlying modulation mechanism. Core soil/sediment samples were collected from an abandoned e-waste burning site and neighboring farmland/stream sites in Guiyu, China. High concentrations and health risks of toxic heavy metals, particularly, Sb and Sn, and halogenated flame retardants (HFRs), including decabromodiphenyl ether (BDE 209) and decabromodiphenyl ethane (DBDPE) were mostly retained at the top surface layers of soils/sediments (0–30 cm) after more than one year of natural vertical diffusion and microbe-facilitated biodegradation. Heavy metals, such as Ag, Cd, Cu, Pb, Sb, and Sn, played a critical role for the reduction of microbial diversity. This is the first study reporting the open burning of e-waste caused an obvious heat effect and enriched thermophilic/mesophilic microbes in local area. The acid washing during e-waste recycling process may result in the enrichment of acidophilic microbes. This investigation showed that e-waste processing operation resulted in not only severe pollution of the soils/sediments by various pollutants, but also reduction of microbial diversity that was difficult to self-store by the local ecosystem.
AB - The present study aims to assess the effect of electronic waste (e-waste) recycling on microbial community and the underlying modulation mechanism. Core soil/sediment samples were collected from an abandoned e-waste burning site and neighboring farmland/stream sites in Guiyu, China. High concentrations and health risks of toxic heavy metals, particularly, Sb and Sn, and halogenated flame retardants (HFRs), including decabromodiphenyl ether (BDE 209) and decabromodiphenyl ethane (DBDPE) were mostly retained at the top surface layers of soils/sediments (0–30 cm) after more than one year of natural vertical diffusion and microbe-facilitated biodegradation. Heavy metals, such as Ag, Cd, Cu, Pb, Sb, and Sn, played a critical role for the reduction of microbial diversity. This is the first study reporting the open burning of e-waste caused an obvious heat effect and enriched thermophilic/mesophilic microbes in local area. The acid washing during e-waste recycling process may result in the enrichment of acidophilic microbes. This investigation showed that e-waste processing operation resulted in not only severe pollution of the soils/sediments by various pollutants, but also reduction of microbial diversity that was difficult to self-store by the local ecosystem.
KW - Electronic waste
KW - Halogenated flame retardant
KW - Heavy metal
KW - Microbial community
UR - http://www.scopus.com/inward/record.url?scp=85063037974&partnerID=8YFLogxK
U2 - 10.1016/j.scitotenv.2019.03.178
DO - 10.1016/j.scitotenv.2019.03.178
M3 - 文章
C2 - 30970449
AN - SCOPUS:85063037974
SN - 0048-9697
VL - 669
SP - 1001
EP - 1010
JO - Science of the Total Environment
JF - Science of the Total Environment
ER -
