title: Trace metal contamination of sediments in an e-waste processing village in China.
abstract: This study examined trace metal contamination of sediments in Guiyu, China where primitive e-waste processing activities have been carried out. It was found that some river sediments in Guiyu were contaminated with Cd (n.d.-10.3mg/kg), Cu (17.0-4540mg/kg), Ni (12.4-543mg/kg), Pb (28.6-590mg/kg), and Zn (51.3-324mg/kg). The (206)Pb/(207)Pb and (208)Pb/(207)Pb ratios of the Pb-contaminated sediments of Lianjiang (1.1787+/-0.0057 and 2.4531+/-0.0095, respectively) were lower than those of Nanyang River (1.1996+/-0.0059 and 2.4855+/-0.0082, respectively), indicating a significant input of non-indigenous Pb with low (206)Pb/(207)Pb and (208)Pb/(207)Pb ratios. Copper, Pb and Zn in the non-residual fractions noticeably increased in the contaminated sediments compared to those in the uncontaminated sediments. A genuine concern is associated with potential transport of the contaminated sediments downstream and enhanced solubility and mobility of trace metals in the non-residual fractions.
authors.affiliation: Department of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong. cobywong@hotmail.com
authors.forename: Coby S C
authors.initials: CS
authors.lastname: Wong
authors.forename: S C
authors.initials: SC
authors.lastname: Wu
authors.forename: Nurdan S
authors.initials: NS
authors.lastname: Duzgoren-Aydin
authors.forename: Adnan
authors.initials: A
authors.lastname: Aydin
authors.forename: Ming H
authors.initials: MH
authors.lastname: Wong
mesh_terms: D002104:Cadmium / Q000032:analysis; D002681:China; D003035:Cobalt / Q000032:analysis; D003300:Copper / Q000032:analysis; D004581:Electronics; D004784:Environmental Monitoring / Q000379:methods; D019015:Geologic Sediments / Q000032:analysis*; D007554:Isotopes / Q000032:analysis; D007854:Lead / Q000032:analysis; D019216:Metals, Heavy / Q000032:analysis* / Q000737:chemistry; D009532:Nickel / Q000032:analysis; D012037:Refuse Disposal / Q000379:methods*; D012423:Rural Health; D014639:Vanadium / Q000032:analysis; D015032:Zinc / Q000032:analysis
chemical_list: D007554:Isotopes; D019216:Metals, Heavy; D002104:Cadmium; D014639:Vanadium; D007854:Lead; D003035:Cobalt; D003300:Copper; D009532:Nickel; D015032:Zinc