The concentrations and spatial distributions of hexabromocyclododecane (HBCDD) and tetrabromobisphenol A (TBBPA) were measured in tree bark from different functional areas of Shanghai. ΣHBCDD (sum of α-, β-, and γ-HBCDD) concentrations ranged from 1.2 × 10² to 6.6 × 10³ ng g⁻¹ lw (median 5.7 × 10² ng g⁻¹ lw) and TBBPA concentrations ranged from 48 to 7.2 × 10⁴ ng g⁻¹ lw (median 2.8 × 10² ng g⁻¹ lw). The concentrations of ΣHBCDD and TBBPA all followed the order of industrial areas > commercial areas > residential areas. The mean percentage of α-HBCDD in bark samples (44%) from Shanghai was higher than that in technical HBCDD products, but comparable with that in air. The concentrations of TBBPA and individual HBCDD diastereoisomers between industrial areas and commercial areas were correlated. Based on the concentrations of HBCDD in the bark, the corresponding atmospheric HBCDD concentrations were estimated. Compared with the published data for HBCDD in urban air, the estimated atmospheric HBCDD concentrations in Shanghai had a relatively high level, and more attention should be paid to the pollution status of HBCDD in Shanghai.

中文翻译：

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上海不同功能区树皮中的六溴环十二烷和四溴双酚A：水平和空间分布

在上海不同功能区的树皮中测量了六溴环十二烷（HBCDD）和四溴双酚A（TBBPA）的浓度和空间分布。ΣHBCDD（α-，β-和γ-HBCDD的总和）浓度范围为1.2×10 ²至6.6×10 ³ ng g ^-1 lw（中值5.7×10 ² ng g ^-1 lw），TBBPA浓度范围为48至7.2×10 ⁴ ng g ^-1 lw（中位数2.8×10 ² ng g ^-1lw）。ΣHBCDD和TBBPA的浓度均遵循工业区>商业区>居民区的顺序。上海的树皮样品中α-六溴环十二烷的平均百分比（44％）高于工业六溴环十二烷产品，但与空气相当。工业区和商业区之间的TBBPA和单个HBCDD非对映异构体的浓度是相关的。根据树皮中六溴环十二烷的浓度，估算相应的大气六溴环十二烷浓度。与城市空气中六溴环十二烷的公开数据相比，上海大气中六溴环十二烷的估计浓度相对较高，应更加注意上海六溴环十二烷的污染状况。