Imperial College London
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Emeritus ProfessorNigelGraham

Faculty of Engineering, Department of Civil and Environmental Engineering

Senior Research Investigator
 
 
 
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Contact

 

n.graham Website

 
 
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Assistant

 

Miss Judith Barritt +44 (0)20 7594 5967

 
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Location

 

406Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Zhu:2017:10.1016/j.scitotenv.2017.11.159,
author = {Zhu, X and Beiyuan, J and Lau, AYT and Chen, SS and Tsang, DCW and Graham, NJD and Lin, D and Sun, J and Pan, Y and Yang, X and Li, XD},
doi = {10.1016/j.scitotenv.2017.11.159},
journal = {Science of the Total Environment},
pages = {1153--1162},
title = {Sorption, mobility, and bioavailability of PBDEs in the agricultural soils: Roles of co-existing metals, dissolved organic matter, and fertilizers},
url = {http://dx.doi.org/10.1016/j.scitotenv.2017.11.159},
volume = {619-620},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Polybrominated diphenyl ethers (PBDEs) are common pollutants released from electronic waste (e-waste) dismantling and recycling activities. Our city-wide survey of agricultural soils in Qingyuan (40 sampling sites), where e-waste recycling has been active, observed exceedance of PBDEs above background levels (average of 251.9 ng g − 1 , 87 times the regional baseline concentration) together with elevated levels of metals/metalloids at the contamination hotspots, such as As (180.4 mg kg − 1 ), Cu (100.7 mg kg − 1 ), Zn (93.4 mg kg − 1 ), Pb (37.8 mg kg − 1 ), Cr (15.1 mg kg − 1 ), and Cd (0.3 mg kg − 1 ). Hence, a twenty-cycle batch sorption test on composite soil samples from the e-waste site was conducted to study the fate of BDE-28 (2,4,4′-tribromodiphenyl ether) and BDE-99 (2,2′,4,4′,5-pentabromodiphenyl ether) under the influence of co-existing trace elements (TEs) (Cu, Pb, Zn, and Cd, which exceeded Chinese Environmental Quality Standard for Soils), dissolved organic matter (extracted from local peat), and locally available commercial fertilizer. The results showed that the presence of TEs barely affected the sorption of BDEs, probably because the low concentration of BDEs in the environment resulted in nearly complete sorption onto the soil. In contrast, metals sorption onto soil was promoted by the presence of BDEs. The mobility of BDE-28 was higher than BDE-99 in water leaching tests, while the leaching concentration of BDE-99 was further reduced in simulated acid rain possibly due to protonation of π-accepting sites in soil organic matter. In the freshly spiked soil, BDEs of greater hydrophobicity and larger molecular size exhibited higher bioavailability (due to greater affinity to Tenax extraction), which was contrary to the field contaminated soil. Similarly, the co-occurrence of metals and fertilizer increased the bioavailability of newly sorbed BDE-99 more than BDE-28 in the soil. These res
AU  - Zhu,X
AU  - Beiyuan,J
AU  - Lau,AYT
AU  - Chen,SS
AU  - Tsang,DCW
AU  - Graham,NJD
AU  - Lin,D
AU  - Sun,J
AU  - Pan,Y
AU  - Yang,X
AU  - Li,XD
DO  - 10.1016/j.scitotenv.2017.11.159
EP  - 1162
PY  - 2017///
SN  - 0048-9697
SP  - 1153
TI  - Sorption, mobility, and bioavailability of PBDEs in the agricultural soils: Roles of co-existing metals, dissolved organic matter, and fertilizers
T2  - Science of the Total Environment
UR  - http://dx.doi.org/10.1016/j.scitotenv.2017.11.159
UR  - http://hdl.handle.net/10044/1/55464
VL  - 619-620
ER  -
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