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• 基金项目：

• 周家义
• 山东海洋学院化学系

• 潜琬英
• 山东海洋学院化学系

• 顾郁翘
• 山东海洋学院化学系

• 崔俊芝
• 山东海洋学院化学系

• 刘敏光
• 山东海洋学院化学系

• 刘贵聚
• 山东海洋学院化学系

• 符瑞文
• 山东海洋学院化学系

• 荆卫华
• 山东海洋学院化学系

• 摘要：本文对排放入胶州湾中铬的主要污染源——娄山河河口海域及上游工业废水中铬的迁移形态特征及其转化;废水及河口海域海水中六价铬向三价铬的转变及其速率以及河口海域海水中三价铬向底质的迁移及其影响因素等地球化学过程进行了现场调查和室内模拟实验。实验结果进一步证实了胶州湾娄山河口及沿岸海域中铬的可能的迁移机制为Cr_水^VI→Cr_水^Ⅲ→Cr_水^悬→Cr₍底质^酸溶→Cr_底质^总,并为这一过程作了定量估算,提出了胶州湾娄山河口海域铬的迁移模式图。

• Abstract：In this paper field investigations and laboratory experiments were done on characterization of chromium speciation in industrial wastes which enter Jiaozhou Bay through Lousan River; reduction of Cr (VI) to Cr (III) in sea water of Lousan Estuary and upstream industrial wastes; and transfer of chromium (III) from sea water to sediment in Lousan Estuary.Nearly 80% of total Cr (VI) drained from outfalls of the factory can be reduced by sulfides and tannic acid originally in the wastes before they enter into Jiaozhou Bay. Under high concentration of tannic acid, reduction of Cr (VI) is of first order. Cr (VI) which has already been drained into seawater can continuously be reduced by reductants remaining in the estuary environment. The reducing ability of sulfide and tannic acid at different initial Cr(VI) concentrations can be used to estimate the amount and percentage of Cr(VI) to be reduced in both industrial wastes and the wastewater and seawater mixed system.Results of simulating laboratory experiments show that Cr(I) canbe transformed to Cr(OH)₃ after mixing with seawater, and over 90% of Cr(OH), is coagulated and removed from seawater at ratios of Cr(Ⅲ)/seawater from 1/100 (Cr(Ⅲ) = 5.66ppm) to 1/600 (Cr(Ⅲ) = 1.13ppm). 90% of the original amount of Cr(Ⅲ) can also be adsorbed on unpolluted suspended field sediment within 30 minutes in a mixed system of industrial wastes and seawater with 2 ppm Cr(Ⅲ) and 1g/1 suspended sediment.Results further confirm the probable course and mechanism of transfer of chromium in estuaries and coastal regions presented by the authors in 1980: Cr(VI)water→Cr(Ⅲ)water→Cr partse→Cr→Crtotal .Based on the above field investigation and simulating laboratory experiment, a diagrammatic presentation of mobilization and transfer of different species of chromium in the marine environment of Lousan Estuary, Jiaozhou Bay is described.

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