深圳海滩塑料垃圾及其重金属污染分析

向静雅; 王倩; 邵明帅; 王前; 吴华南; 徐期勇

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中国环境科学 ›› 2020, Vol. 40 ›› Issue (7) : 3097-3105.

环境生态

深圳海滩塑料垃圾及其重金属污染分析

向静雅, 王倩, 邵明帅, 王前, 吴华南, 徐期勇

作者信息 +

Assessment of beach plastic waste and its heavy metal pollution in Shenzhen

XIANG Jing-ya, WANG Qian, SHAO Ming-shuai, WANG Qian, WU Hua-nan, XU Qi-yong

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文章历史 +

摘要

海洋塑料垃圾污染是一个全球性环境问题，为了解海岸线上塑料垃圾及其重金属污染情况，本研究在深圳海岸线上选取5个典型海滩，分析海滩塑料垃圾的组成和来源，并研究塑料垃圾的重金属含量及其浸出行为，评估其潜在的摄入风险.结果表明：塑料和泡沫塑料是海滩垃圾最主要的组成成分，占比高达72%；人类海岸活动是海滩塑料垃圾最主要的来源，占比高达80.58%；塑料垃圾中Zn、Ba、Pb的含量较高，其中Zn的平均值达到500mg/kg以上；在模拟胃酸溶液中，Zn的浸出浓度最高（0.7605~2.6283mg/L），Mn浸出率最高（16.22%~83.45%），Sb的浸出量和浸出率均为最低.基于海滩塑料垃圾样品中重金属最大可浸出率的摄入风险评估表明，塑料样品中的重金属不会造成健康风险.本研究提供的基础数据资料有助于海洋塑料垃圾的管理.

Abstract

Marine plastic waste has become a global environmental problem in recent years. In order to investigate the pollution of plastic waste and its heavy metal contamination on the coastline, plastic waste was collected from five typical beaches along the Shenzhen coastline. The compositions and sources of the beach plastic waste were analyzed. Its heavy metal content and leaching behavior were studied for the assessment of the potential health risk through ingestion. The results showed that plastics and foam plastics were the main compositions, accounting for up to 72% of the beach plastic waste. The main source of beach plastic waste included shoreline and recreational activities, accounting for up to 80.58%. In terms of heavy metal content, zinc (Zn), barium (Ba) and lead (Pb) had the higher contents than other heavy metals in plastic samples, and the average value of Zn was above 500 mg/kg. In the simulated gastric acid leaching test, Zn concentration was found to be the highest (0.7605~2.6283 mg/L), while manganese (Mn) showed the highest leaching ratio (16.22%~83.45%). Antinomy (Sb) showed the lowest concentration and leaching ratio. The results of health risk assessment through ingestion indicated that the heavy metals in plastic samples did not pose a health risk. This work would benefit the management of marine plastic waste by providing relevant fundamental information.

导出引用

向静雅, 王倩, 邵明帅, 王前, 吴华南, 徐期勇. 深圳海滩塑料垃圾及其重金属污染分析[J]. 中国环境科学. 2020, 40(7): 3097-3105

XIANG Jing-ya, WANG Qian, SHAO Ming-shuai, WANG Qian, WU Hua-nan, XU Qi-yong. Assessment of beach plastic waste and its heavy metal pollution in Shenzhen[J]. China Environmental Science. 2020, 40(7): 3097-3105

中图分类号： X55

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