Abstract The heavy metal release experiments were conducted in the laboratory to examine the effects of 3 factors - pH, dissolved oxygen (DO), and temperature on the metal release from sediments taken from the Huangpu River. The metal concentrations in the dry sediments ranged from 0.030 to 0.296 mg g-1 for Cr, 0.021 to 0.097 mg g-1 for Ni, 0.014 to 0.219 mg g-1 for Cu, 0.035 mg to 0.521 mg g-1 for Zn, 0.0002 to 0.001 mg g-1 for Cd and 0.023 to 0.089 mg g-1 for Pb. Most of the metals found in the sediments were in the form of residual fraction, the exchangeable fraction consisted of only a small portion of total metals. The average dissolved metal concentrations in the overlying water during the 13-day period under different conditions were ranging from 0.82 to 1.93 μg L-1 for Cr, 1.08 to 4.19 μg L-1 for Ni, 40.79 to 82.28 μg L-1 for Cu, 20.30 to 29.96 μg L-1 for Zn, 1.57 to 4.07 μg L-1 for Cd, and 22.26 to 75.50 μg L-1 for Pb, respectively. Statistical interpretation of the data indicated that pH (7, 8, 9), dissolved oxygen DO (1.0 and 5.0 mg L-1) and temperature (4, 16, 25°C) had no significant effects on the heavy metal release under the studied conditions. Cu and Pb had the highest release flux, while Cd, Pb and Cu had higher mobility. The main factors controlling the metals release might be the inherent characters of metals and sediments.

中文翻译：

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实验室条件下上覆水pH值、溶解氧和温度对河流沉积物中重金属释放的影响

摘要 在实验室内进行了重金属释放实验，研究了pH、溶解氧(DO)和温度3个因素对黄浦江沉积物金属释放的影响。干燥沉积物中的金属浓度范围为：Cr 0.030 至 0.296 mg g-1，Ni 0.021 至 0.097 mg g-1，Cu 0.014 至 0.219 mg g-1，Zn 0.035 mg 至 0.521 mg g-1， Cd 为 0.0002 至 0.001 mg g-1，Pb 为 0.023 至 0.089 mg g-1。沉积物中发现的大部分金属以残余部分的形式存在，可交换部分仅占总金属的一小部分。不同条件下13天期间上覆水中溶解金属的平均浓度范围为Cr的0.82至1.93 μg L-1，Ni的1.08至4.19 μg L-1，Cu的40.79至82.28 μg L-1 ，20。Zn 为 30 至 29.96 μg L-1，Cd 为 1.57 至 4.07 μg L-1，Pb 为 22.26 至 75.50 μg L-1。数据的统计解释表明，pH (7, 8, 9)、溶解氧 DO (1.0 和 5.0 mg L-1) 和温度 (4, 16, 25°C) 对重金属释放没有显着影响。研究的条件。Cu 和 Pb 的释放通量最高，而 Cd、Pb 和 Cu 的迁移率较高。控制金属释放的主要因素可能是金属和沉积物的固有特性。Cu 和 Pb 的释放通量最高，而 Cd、Pb 和 Cu 的迁移率较高。控制金属释放的主要因素可能是金属和沉积物的固有特性。Cu 和 Pb 的释放通量最高，而 Cd、Pb 和 Cu 的迁移率较高。控制金属释放的主要因素可能是金属和沉积物的固有特性。