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在实验室建造的淡水生态系统中,遗留和新型制阻燃剂:分布,生物积累和热量转移

Shanqi Zhou¹, Mengru Fu¹, Siyuan Ling²

¹State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, School of Resource and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China.

|June 10, 2023

概括

制阻燃剂 (BFRs) 在水生食物网中生物累积,构成风险. 这项研究显示了一些BFR的热量稀释,但强调了由于生物积累因素的持续环境问题.

科学领域:

环境科学环境科学
生态毒理学生态毒理学
环境化学环境化学

背景情况:

制阻燃剂 (BFR) 广泛使用,导致环境污染.
电子垃圾场沉积物中的高度BFRs通过生物积累和食物网转移带来风险.
了解BFR在水生生态系统中的命运对于人类健康风险评估至关重要.

研究的目的:

在实验室构建的水生食物网中研究五种选定的BFR的分布,生物积累和热带转移.
为了确定饮食摄入对水生生物BFR水平的影响.
评估特定BFR的热量稀释或放大潜力.

主要方法:

根据电子垃圾场沉积物中的高检测,选择了五个BFR (PBT,HBB,BTBPE,DBDPE,BDE209).
建立一个实验室构建的水生微生态系统 (食物网).
在5个月的暴露期内分析BFR分布,生物积累因子 (BAF) 和脂质正常化度.

主要成果:

食物网样本之间的显著相关性表明,饮食吸收影响BFR水平.
观察到BTBPE和DBDPE的热量稀释,通过热量水平和脂质正常化度之间的负相关性来表明.
生物积累因子 (BAF) 范围为2.49至5.17L/kg,表明持续的环境风险.

结论:

饮食习惯显著影响水生食物网中的BFR生物积累和热量转移.
虽然一些BFR表现出营养稀释,但整体生物积累需要持续的环境监测和风险评估.
在BFRs的整体热量放大潜力的确定中,高热量水平的生物可能起着关键作用.

关键词:

在BFRs中,BFRs是BFRs.饮食摄入量饮食摄入量分布,生物积累生物积累热带转移是因为热带转移.

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