渤海表层沉积物中砷的含量、形态、空间分布及风险评价

doi:10.13292/j.1000-4890.202312.003

生态学杂志 ›› 2023, Vol. 42 ›› Issue (12): 2844-2852.doi: 10.13292/j.1000-4890.202312.003

• 重金属污染与修复专栏 • 上一篇下一篇

渤海表层沉积物中砷的含量、形态、空间分布及风险评价

刘思佳^1,2,史明易³,马旭³,王少锋^1,3,吴星^1*,王新¹,曾祥峰^1*,贾永锋¹

（¹中国科学院沈阳应用生态研究所，污染生态与环境工程重点实验室，沈阳 110016； ²中国科学院大学，北京 100049； ³大连理工大学环境学院，工业生态与环境工程教育部重点实验室，辽宁大连 116024）

出版日期:2023-12-10 发布日期:2024-06-10

The content, speciation, spatial distribution, and risk assessment of arsenic in the surface sediments of Bohai Sea.

LIU Sijia^1,2, SHI Mingyi³, MA Xu³, WANG Shaofeng^1,3, WU Xing^1*, WANG Xin¹, ZENG Xiangfeng^1*, JIA Yongfeng¹#br#

#br#

(¹Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; ²University of Chinese Academy of Sciences, Beijing 100049, China; ³Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, Liaoning, China).

Online:2023-12-10 Published:2024-06-10

摘要/Abstract

摘要： 考察了渤海海域表层沉积物中砷的含量、分布及赋存形态，评估了沉积物中砷的生态风险，初步探讨了影响沉积物中砷分布的环境化学因子。结果表明，渤海海域表层沉积物中总砷浓度变化范围为9.77～20.60 mg·kg^-1，平均浓度为13.33±2.55 mg·kg^-1。表层沉积物中总砷的空间分布呈现出由近岸向中部逐渐递减趋势，具有西部高，东部低的特点；各个海区之间总砷含量差异显著，渤海湾和莱州湾海区表层沉积物中总砷含量相对较高。渤海表层沉积物中砷的主要形态为挥发性硫化物、碳酸盐或与无定型铁锰氧化物结合态；沉积物中砷具有一定的生态风险。渤海表层沉积物中砷含量与水体温度、磷浓度、溶解氧含量、pH、沉积物中铁含量和有机质含量呈显著的相关关系。水环境因子和沉积物的理化性质可能对沉积物中砷的分布具有重要影响。

关键词: 渤海, 砷, 沉积物, 生态风险

Abstract: In this study, we measured the content, speciation, and distribution of arsenic in the surface sediments with samples collected from 37 sites in Bohai Sea, China. The ecological risks associated with the sedimentary arsenic were evaluated, and the impacts of aquatic and sedimentary physicochemical parameters on the distribution of arsenic in sediments were explored. The results showed that the total arsenic concentrations in the surface sediments of the Bohai Sea ranged from 9.77 to 20.60 mg·kg^-1, with an average concentration of 13.33 mg·kg^-1. There were significant differences in total arsenic content of the sediments among different sea areas. Generally, the concentration of total arsenic in the surface sediments decreased from the nearshore areas to the middle of the Bohai Sea. Total arsenic burdens in the western areas of the Bohai Sea were usually higher than that from the eastern areas. The highest total arsenic concentrations in the sediments were recorded in Bohai Bay and Laizhou Bay. The results of sequential extractions showed that volatile sulfides, carbonates or amorphous iron and manganese oxides associated arsenic were the main forms of the arsenic in the surface sediments. The arsenic in the sediments of the Bohai Sea had low to moderate ecological risks. Total arsenic content in the surface sediments was significantly correlated with temperature, P concentration, pH, dissolved oxygen content of the overlying seawater, and iron content and organic matter content in the sediments.

Key words: Bohai Sea, arsenic, sediment, ecological risk.

刘思佳, 史明易, 马旭, 王少锋, 吴星, 王新, 曾祥峰, 贾永锋. 渤海表层沉积物中砷的含量、形态、空间分布及风险评价[J]. 生态学杂志, 2023, 42(12): 2844-2852.

LIU Sijia, SHI Mingyi, MA Xu, WANG Shaofeng, WU Xing, WANG Xin, ZENG Xiangfeng, JIA Yongfeng. The content, speciation, spatial distribution, and risk assessment of arsenic in the surface sediments of Bohai Sea.[J]. Chinese Journal of Ecology, 2023, 42(12): 2844-2852.

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渤海表层沉积物中砷的含量、形态、空间分布及风险评价

The content, speciation, spatial distribution, and risk assessment of arsenic in the surface sediments of Bohai Sea.

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