| 郝迪,亦如瀚,吴俣,陆允峰,方创立.贵屿地区不同类型农业土壤多溴联苯醚的污染特征和暴露评估[J].农业环境科学学报,2015,34(5):882-890. |
| 贵屿地区不同类型农业土壤多溴联苯醚的污染特征和暴露评估 |
| Pollution Characteristics and Exposure Risk Assessment of Polybrominated Diphenyl Ethers in Different Types Agricultural Soils in Guiyu Area |
| 投稿时间：2014-12-03 |
| DOI：10.11654/jaes.2015.05.010 |
| 中文关键词: 多溴联苯醚 贵屿 风险评估 电子垃圾拆解区 |
| 英文关键词: PBDEs Guiyu exposure risk assessment e-waste recycling area |
| 基金项目:暨南大学2012年重大重点项目培育项目(21612103);暨南大学本科生创新工程项目2014年CX14167 |
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| 中文摘要: |
| 在贵屿及周边区域128 km2内,采集了131份不同土地利用方式的表层农业土壤样品,分析测定了41个多溴联苯醚的含量。结果表明,贵屿镇及周边农业土壤41个多溴联苯醚含量范围为30~9400 ng·g-1,其中十溴联苯醚(BDE209)为Nd~9200 ng·g-1,检出率达90%以上的有18个多溴联苯醚同系物,PBDEs已经普遍存在于电子垃圾拆解区域的农业土壤;在不同土地利用方式中,除BDE209以外的40个多溴联苯醚之和(∑40PBDEs)和BDE209含量呈现相反的趋势,∑40PBDEs含量呈水稻田 >果园 >其他水田 >菜地 >树林 >废弃地,BDE209呈现出废弃地 >菜地 >其他水田 >水稻田 >果园 >树林的趋势。根据HJ 25.3-2014《污染场地风险评估技术导则》对美国环保署(EPA)优控的BDE47、BDE99、BDE153、BDE209等含量,按照各土地利用类型的土壤进行了皮肤接触途径、经口摄入、随土壤颗粒物直接吸入三项的暴露风险评估,结果表明皮肤接触途径 >经口摄入 >随土壤颗粒物吸入风险。虽然三者均未超出美国环保署参考剂量,但农业土壤中多溴联苯醚经农作物吸收造成的暴露风险亟需进一步的研究。 |
| 英文摘要: |
| Extensive applications of polybrominated diphenyl ethers(PBDEs) have caused the environmental pollution. In the present study, 131 agricultural topsoil samples were collected from different land uses within 128 square kilometer area surrounding Guiyu, and the concentrations of 41 PBDE congeners in each sample were determined. Results showed that the concentrations of 41 PBDE congeners varied from 30 to 9400 ng·g-1, and those of deca-polybrominated diphenyl ether(BDE209) ranged from no detection to 9200 ng·g-1. There were 18 PBDE congeners whose detection frequencies were higher than 90%, indicating the general presence of polybrominated diphenyl ethers in different land use types of agricultural soils in e-waste recycling area. The concentrations of 40 polybrominated diphenyl ether congeners except BDE209(∑40PBDEs) were in order of paddy soils >orchard soils >other flooded soils >vegetable soils >wood field soils >waste field soils, but that of BDE209 decreased in order of waste field soils >vegetable soils >other flooded soils > paddy rice soils >orchard soils >forest soils. According to the “Technical Guidelines for Risk Assessment of Contaminated Sites”(HJ25.3-2014), exposure risk assessments of PBDEs via skin contact, oral ingestion, and inhalation of soil particles were carried out for BDE47, BDE99, BDE153 and BDE209 that are the priority control pollutants by US Environmental Protection Agency(USEPA). The results indicated that all exposure levels of BDE47, BDE99, BDE153 and BDE209 via these three pathways did not exceed the USEPA reference doses. However, it is critical to study the risk of polybrominated diphenyl ethers in agricultural soils via food chain. |
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