Hexabromocyclododecane (HBCD) and tetrabromobisphenol A (TBBPA) in riverine and estuarine sediments of the Pearl River Delta in southern China, with emphasis on spatial variability in diastereoisomer- and enantiomer-specific distribution of HBCD

Current levels and composition profiles of PBDEs and alternative flame retardants in surface sediments from the Pearl River Delta, southern China: Comparison with historical data

“…The similar fraction ranges in the Dongjiang River and the PRE are evidence that the Dongjiang River runoff is primarily responsible for the presence of HFRs in the PRE. This result is consistent with our previous results indicated by the diastereoisomer compositions and enantiomeric fractions of HBCD in the sediments in these areas (Feng et al, 2012). Fig.…”

“…The rivers run through urban, electronics manufacturing, less-industrialized, rural, or electronic waste (e-waste) recycling areas that are potentially a characteristic of different pollution sources and levels. Sample collection was described in detail in a previous study (Feng et al, 2012) and is given briefly here. Surface sediment (top 5 cm) samples were collected from July 2009 to October 2010 in four major rivers and an estuary in the PRD region ( Fig.…”

“…Treated or untreated industrial effluents in Dongguan and Shunde were the major sources of HFRs for the Dongjiang River and Shunde tributaries. The industrial, commercial, and domestic sources in densely populated Guangzhou are largely responsible for the occurrence of HFRs in the Zhujiang Rivers (Feng et al, 2012). HFRs in the sediments of the Dayanhe River are associated with e-waste dismantling activities.…”

Reductive transformation of hexabromocyclododecane (HBCD) by FeS

“…Due to the frequent co-occurrence of TBBPA, decaBDE and HBCD in various anoxic sediments (Chen et al, 2013;Feng et al, 2012;Lee et al, 2015;Verslycke et al, 2005), studying their transformation patterns under the same conditions is important not only for a better understanding of their environmental fates, but also for the development of suitable remediation approaches for sediments cocontaminated by these BFRs. Surprisingly, little such empirical research has been done.…”

Species-Specific Bioaccumulation of Halogenated Organic Pollutants and Their Metabolites in Fish Serum from an E-Waste Site, South China

“…A Phenomonex Nucleosil b-PM chiral LC column (200 mm 9 4.0 mm i.d., 5 lm; Macherey-Nagel, GmbH&Co, Germany) was used for HBCD enantiomer separation. Details of the analytical methodology used for separation and quantification of TBBPA and HBCD were published previously (Feng et al 2012).…”