蔡一枝, 李发明, 刘凌峰, 陆文平, 曹保玉. 汕尾近岸水体和沉积物中有机氯农药的残留特征及生态风险评价[J]. 海洋环境科学, 2022, 41(3): 387-394. DOI: 10.12111/j.mes.20200333
引用本文: 蔡一枝, 李发明, 刘凌峰, 陆文平, 曹保玉. 汕尾近岸水体和沉积物中有机氯农药的残留特征及生态风险评价[J]. 海洋环境科学, 2022, 41(3): 387-394. DOI: 10.12111/j.mes.20200333
CAI Yi-zhi, LI Fa-ming, LIU Ling-feng, LU Wen-ping, CAO Bao-yu. Residue characteristics and ecological risk assessment of organochlorine pesticides in coastal waters and sediments of Shanwei[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2022, 41(3): 387-394. DOI: 10.12111/j.mes.20200333
Citation: CAI Yi-zhi, LI Fa-ming, LIU Ling-feng, LU Wen-ping, CAO Bao-yu. Residue characteristics and ecological risk assessment of organochlorine pesticides in coastal waters and sediments of Shanwei[J]. Chinese Journal of MARINE ENVIRONMENTAL SCIENCE, 2022, 41(3): 387-394. DOI: 10.12111/j.mes.20200333

汕尾近岸水体和沉积物中有机氯农药的残留特征及生态风险评价

Residue characteristics and ecological risk assessment of organochlorine pesticides in coastal waters and sediments of Shanwei

  • 摘要: 本研究通过对汕尾近岸水体和沉积物中两类有机氯农药(六六六和滴滴涕)的分析测定,评估了汕尾海域的有机污染现状和生态风险。研究表明,汕尾近岸水体中六六六(HCHs)和滴滴涕(DDTs)的含量分别为0.26~3.53 ng/L和nd(未检出,下同)~6.77 ng/L,沉积物中HCHs和DDTs的含量分别为nd~0.62 ng/g(干重,下同)和22.04~105.76 ng/g。与国内其他河口、海湾相比,汕尾近岸水体中HCHs和DDTs的含量处于中等偏低水平,但沉积物中的DDTs处于较高水平。水体中HCHs和DDTs的空间分布表现为品清湖与红海湾交汇处含量最高,这主要与周边密集社会生产活动的排放有关。沉积物中DDTs空间分布表现为品清湖内高于湖外,湖内从南向北逐渐升高,这主要受较差的水动力条件影响。生态风险评价结果显示,水体和沉积物中HCHs的风险较小,沉积物中的DDTs存在较高的风险,可能对海洋生态环境和人体健康产生潜在危害,需引起重视并开展持续深入的研究,以提出该海域有机污染防治的策略。

     

    Abstract: To analyse the status and ecological risk of organic pollution in coastal areas of Shanwei, concentrations of two kinds of organochlorine pesticides (HCHs and DDTs) in surface water and sediments were determined. Total concentrations of HCHs and DDTs in surface water were in the range of 0.26~3.53 ng/L and nd~6.77 ng/L, respectively, and total concentrations of HCHs and DDTs in sediments were nd~0.62 ng/g and 22.04~105.76 ng/g dry weight, respectively. Compared with other estuaries and bays in China, the total concentrations of HCHs and DDTs in surface water from the study area were at a moderately low level, while the total concentrations of DDTs in sediments were relatively high. Both of HCHs and DDTs in surface water reached the highest concentrations at the junction area of Pinqing lake and Red bay, which was mainly related to the emissions from the surrounding intensive social productive activities. DDTs in sediments presented that inside the Pinqing lake was higher than outside the lake, and there was an increasing trend from the south to the north, which was mainly due to the poor hydrodynamic condition. Risk assessment showed that the ecological risk of HCHs in water and sediments is in a low level, and there is high ecological risk of DDTs in sediments, which may cause harm to marine ecosystem and population health, and this requires attention and continuous research for the purpose of preventing and controlling organic pollution in the study area.

     

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