中国西北渭河流域沉积物中六溴环十二烷的浓度、分布及风险评估。
Concentrations, Distributions, and Risk Assessment of HBCD in Sediment in the Weihe River Basin in Northwest China.
机构信息
Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region, Ministry of Education, Chang'an University, Xi'an 710054, China.
Dooge Centre for Water Resource Research, School of Civil Engineering, University College Dublin, Belfield, 999014 Dublin 4, Ireland.
出版信息
Int J Environ Res Public Health. 2018 Oct 23;15(11):2340. doi: 10.3390/ijerph15112340.
As one of the most widely used brominated flame retardants, hexabromocyclododecane (HBCD) is found widely in the environmental media. In this study, the content and spatial distribution of HBCD and risk posed by HBCD in surface sediment in the Weihe River Basin in Northwest China were investigated. The HBCD concentration ranged nd⁻4.04 ng/g dw with the mean was 0.45 ng/g dw. The major source of HBCD in surface sediment was local point discharge. The distribution profiles of α-, β-, γ-HBCD were 24.7⁻87.9%, 0⁻42.0%, and 0⁻67.1%, respectively. Specially, α-HBCD was the dominating isomer in most sample sites. This differed significantly from that in HBCD technical product, which might be attributed to the different degradation rates and inter-transformation of the three HBCD isomers. Risk quotient method was used to assess the potential risk posed by HBCD in sediment. HBCD do not pose strong risks to aquatic algae organisms in the Weihe River Basin.
作为最广泛使用的溴化阻燃剂之一，六溴环十二烷（HBCD）广泛存在于环境介质中。本研究调查了中国西北渭河流域表层沉积物中 HBCD 的含量、空间分布及 HBCD 带来的风险。HBCD 的浓度范围为未检出⁻4.04ng/g dw，平均值为 0.45ng/g dw。表层沉积物中 HBCD 的主要来源是当地的点源排放。α-、β-、γ-HBCD 的分布剖面分别为 24.7⁻87.9%、0⁻42.0%和 0⁻67.1%。特别地，α-HBCD 是大多数采样点的主要异构体。这与 HBCD 技术产品明显不同，这可能归因于三种 HBCD 异构体的不同降解速率和相互转化。风险商数法用于评估沉积物中 HBCD 带来的潜在风险。HBCD 对渭河流域水藻生物没有构成强烈风险。
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