Distribution patterns of polychlorinated biphenyls in soils collected from Zhejiang province, east China

Abstract

Polychlorinated biphenyls (PCBs) were determined in surface soil samples from Zhejiang Province, east China. Concentrations of total PCBs ranged widely from 7.50 to 263 ng kg(-1) with a mean value of 45.4 ng kg(-1) (dry matter basis). In general, concentrations in soil samples from the southern part of the test area and especially from some sites near hills tended to be higher than those from other sites. The prevailing winds may have been the main factor influencing the spatial distribution of PCBs in soils. Other factors may have included the distribution of residential areas and land use variables. In this paper we also discuss the relationships between OCPs and PCBs in soils and relationships between these and land use variables as revealed by correlation analysis.

Bioaccumulation of PCDD/Fs, PCBs and PBDEs by earthworms in field soils of an E-waste dismantling area in China

“…∑ 19 PCB concentrations in the soil were in the range of 0.43-21.3 ng g −1 dw (average 4.31 ng g −1 dw) and 0.14-4.80 pg WHO-TEQ g −1 dw (average 1.06 pg WHO-TEQ g −1 dw), which were lower than some previous results in the same area (Bi et al, 2002;Gao et al, 2006;Shen et al, 2009;Zhao et al, 2006), but comparable to the observation in another E-waste area in south China (Liu et al, 2008). Indicator PCBs had noticeably higher concentrations than other congeners, accounting for >80% of ∑ 19 PCBs (Fig.…”

“…Many studies have reported very high level of organic contaminants such as polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins/ dibenzofurans (PCDD/Fs) and PBDEs in E-waste areas (Gao et al, 2006;Liu et al, 2008;Ma et al, 2008Ma et al, , 2009Zhao et al, 2006). Taizhou, situated Environment International 54 (2013) [50][51][52][53][54][55][56][57][58] in the eastern coastline of China, is such an area that has received wide attention due to the large number of illegal E-waste dismantling workshops.…”

Potential for biodegradation of polychlorinated biphenyls (PCBs) by Sinorhizobium meliloti

“…For extraction of PCBs from soil microcosms, a modified method of Gao et al [20] was used. Briefly, 10 g soil sample was thoroughly extracted with 30 mL hexane/acetone (1:1, v/v) overnight, sonicated at 600 W, 25 • C for 15 min with a Model KQ-600B sonicator (Kunshan Ultrasonic Instruments).…”

PCB removal, soil enzyme activities, and microbial community structures during the phytoremediation by alfalfa in field soils

“…Soil PCB extraction and analysis were performed using methods described by Gao et al (2006). Briefly, 10 g of soil sample was thoroughly extracted with 30 ml hexane/acetone (1:1 v/v) overnight and sonicated at 600 W, 25°C for 15 min with a Model KQ-600B sonicator (Kunshan Ultrasonic Instruments).…”