Trophic transfer of hexabromocyclododecane in the terrestrial and aquatic food webs from an e-waste dismantling region in East China

Abstract

Trophic transfer of hexabromocyclododecane (HBCD) was investigated in both the terrestrial and aquatic food webs from an e-waste dismantling region in East China. The mean S 3 HBCD concentrations in the terrestrial species varied from 0. Environmental impact E-waste recycling areas have been singled out as a major hot spot for persistent organic pollutants (POPs) for many years. In the present study, various terrestrial and aquatic species were collected to investigate the concentration levels and trophic transfer of hexabromocyclododecane (HBCD) from the Taizhou e-waste recycling region in East China. The contamination levels demanded that strict measures should be taken to reduce environmental pollution and protect human health. The results about the trophic transfer of HBCD demonstrated the inconsistent tendencies: trophic dilution in terrestrial food webs and trophic magnication in the aquatic food webs. More research work should be conducted on the trophic transfer of this compound in the aquatic and terrestrial species, which may shed light on the different biomagnication potential in aquatic and terrestrial systems.

Stereoisomer-Specific Trophodynamics of the Chiral Brominated Flame Retardants HBCD and TBECH in a Marine Food Web, with Implications for Human Exposure

“…There were no significant correlations in the concentrations of (±)-β- and (±)-γ-HBCD with the TL. The trophodynamics of HBCD enantiomers in this food web are consistent with the observation in the eastern Canadian Arctic marine food web and in a freshwater food web from an electronic waste recycling site in South China. , Compared with the reported TMFs of α-HBCD (mostly 2–3) in other studies, ,,,− our TMFs were approximately 4-fold higher and comparable to the most biomagnified organic contaminants [e.g., 2,2′,3,3′,4,4′-hexachlorobiphenyl (PCB-128) and oxychlordane, with reported average TMFs of 8.72 and 10.31, respectively] . Our results indicate that α-HBCD can be substantially magnified in the present food web and transferred to top predators.…”

“…The trophic transfer of POPs and POP-like pollutants in food webs is a vital component for assessing their ecological and health risks. Biomagnification of HBCD has been observed through correlation between the TL and the concentration in organisms. − However, most studies do not fully consider the precise predator–prey feeding relationships, and even fewer focus on the trophodynamics of different HBCD enantiomers. , Up to now, the biomagnification potential of TBECH is still uncharacterized.…”

A Review of Distribution and Profiles of HBCD in Different Environmental Media of China

“…Interestingly, the HBCD con centration increases from the south (average: 1.2 ng/g lw) to the north (average: 6.5 ng/g lw) in silver pomfrets (Figure 6b) and other aquatic species, which may be due to the fac that the consumption of EPS/XPS containing HBCD is less in the south than in the north HBCD concentrations (not detected-0.194 ng/g lw) have been detected in 12 consumer fish species in 11 coastal cities in South China (Figure 6a) [74]. Those in apple snails (Am pullaria gigas spix) and grass carp (Ctenopharyngodon idellus) from East China are 3.5-6.55 ng/g lw and 14.9-67.8 ng/g lw, respectively [67]. The obtained results demonstrate similarity to the concentrations found in benthic shellfish, including oysters, scallops, and mussels, in the northern region of the Yellow Sea, which ranged from 0.87 ng/g to 67.08 ng/g [59].…”

“…via the food chain [3,67]. The concentrations of HBCD in organisms are affected by both its concentration in the environment [46,68] and the species [69].…”

“…As a semi-volatile organic pollutant, the main ways for HBCD to enter organisms are through migration of soil and water pollution [ 31 ], respiratory intake [ 66 ], and enrichment via the food chain [ 3 , 67 ]. The concentrations of HBCD in organisms are affected by both its concentration in the environment [ 46 , 68 ] and the species [ 69 ].…”