本文選題：酸可揮發(fā)性硫化物 + 同步可提取重金屬　； 參考：《熱帶海洋學(xué)報》2016年06期

【摘要】：對深圳西部海域7個河流入�？诔练e物中酸可揮發(fā)性硫化物(AVS)和同步可提取重金屬(SEM)的區(qū)域和垂直分布特征進(jìn)行了研究,對沉積物重金屬的潛在生物毒性進(jìn)行初步評價。結(jié)果表明:深圳西部海域河流入海口沉積物AVS的含量范圍為0.54~24.17μmol·g~(-1)之間,平均為10.74μmol·g~(-1),分布規(guī)律為后海河河口西鄉(xiāng)河河口新圳河河口大沙河河口鐵崗水庫洪排口福永河河口深圳河河口;ΣSEM含量范圍為5.58~32.18μmol·g~(-1)之間,平均值為15.63μmol·g~(-1),分布規(guī)律為鐵崗水庫洪排口深圳河河口福永河河口新圳河河口西鄉(xiāng)河河口后海河河口大沙河河口。ΣSEM垂直分布規(guī)律與AVS相似,都有先增高后降低趨勢;沉積物中AVS與沉積物有機(jī)碳(TOC)、粒度以及溶出液p H呈顯著性相關(guān),河口區(qū)沉積物有機(jī)質(zhì)含量越高、粒度越大、p H越高越有利于AVS生成;對沉積物進(jìn)行重金屬生物毒性效應(yīng)分析,表層沉積物中(ΣSEM/AVS)、(ΣSEM-AVS)和(ΣSEM-AVS)/foc值(foc為有機(jī)碳百分含量)的變化范圍分別為0.77~8.93、 5.58~16.85μmol·g~(-1)和-244.30~2071.65μmol·g~(-1),而柱狀沉積物中(ΣSEM/AVS)、(ΣSEM-AVS)和(ΣSEM-AVS)/foc值的變化范圍分別為0.38~8.93、-19.69~36.05μmol·g~(-1)和-1278.27~2931.28μmol·g~(-1)。其中,福永河河口、鐵崗水庫洪排口和深圳河河口沉積物重金屬表現(xiàn)為高生物毒性效應(yīng),應(yīng)加強(qiáng)重金屬污染監(jiān)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，

本文編號：1774741