深圳西部海域河流入海口沉积物酸可挥发性硫、同步提取重金属分布特征与生物毒性评价

发布时间：2018-04-19 21:14

  本文选题：酸可挥发性硫化物 + 同步可提取重金属　； 参考：《热带海洋学报》2016年06期

【摘要】：对深圳西部海域7个河流入海口沉积物中酸可挥发性硫化物(AVS)和同步可提取重金属(SEM)的区域和垂直分布特征进行了研究,对沉积物重金属的潜在生物毒性进行初步评价。结果表明:深圳西部海域河流入海口沉积物AVS的含量范围为0.54~24.17μmol·g~(-1)之间,平均为10.74μmol·g~(-1),分布规律为后海河河口西乡河河口新圳河河口大沙河河口铁岗水库洪排口福永河河口深圳河河口;ΣSEM含量范围为5.58~32.18μmol·g~(-1)之间,平均值为15.63μmol·g~(-1),分布规律为铁岗水库洪排口深圳河河口福永河河口新圳河河口西乡河河口后海河河口大沙河河口。ΣSEM垂直分布规律与AVS相似,都有先增高后降低趋势;沉积物中AVS与沉积物有机碳(TOC)、粒度以及溶出液p H呈显著性相关,河口区沉积物有机质含量越高、粒度越大、p H越高越有利于AVS生成;对沉积物进行重金属生物毒性效应分析,表层沉积物中(ΣSEM/AVS)、(ΣSEM-AVS)和(ΣSEM-AVS)/foc值(foc为有机碳百分含量)的变化范围分别为0.77~8.93、 5.58~16.85μmol·g~(-1)和-244.30~2071.65μmol·g~(-1),而柱状沉积物中(ΣSEM/AVS)、(ΣSEM-AVS)和(ΣSEM-AVS)/foc值的变化范围分别为0.38~8.93、-19.69~36.05μmol·g~(-1)和-1278.27~2931.28μmol·g~(-1)。其中,福永河河口、铁岗水库洪排口和深圳河河口沉积物重金属表现为高生物毒性效应,应加强重金属污染监控。
[Abstract]:The regional and vertical distribution characteristics of AVS and SEM in sediments of seven rivers in western Shenzhen were studied, and the potential biotoxicity of heavy metals in sediments was evaluated. The results show that the content of AVS in the sediments of the estuaries of the rivers in the western part of Shenzhen is between 0.54 ~ 24.17 渭 mol / g ~ (-1). The average value is 10.74 渭 mol / g ~ (-1) ~ (-1), and the distribution pattern is between the Shenzhen River Estuary of the Tiegang Reservoir in the mouth of Dasha River and the mouth of Tiegang River in the mouth of Xinzhen River, and the range of 危 SEM content is 5.58 ~ 32.18 渭 mol / g ~ (-1). The average value is 15.63 渭 mol / g ~ (-1) ~ (-1) ~ (-1), and the distribution law is that the vertical distribution of 危 SEM is similar to that of AVS, which is increased first and then decreased. The distribution pattern is that of Shenzhen River estuary of Fuyong River estuary, Xinzhen River estuary of Xinzhen River estuary of Xinzhen River estuary of Xichen River estuary and the mouth of Haihe River estuary. There was a significant correlation between AVS and TOC in sediment. The higher the content of organic matter in sediment, the higher the particle size of TOC, the higher the particle size of sediment, the higher the concentration of AVS, and the more toxic effects of heavy metals on the sediment, the higher the content of organic matter in the sediment, the higher the particle size of TOC, the higher the particle size, the higher the pH of the sediment. 琛ㄥ眰娌夌Н鐗╀腑(危SEM/AVS),(危SEM-AVS)鍜，

本文编号：1774741