【摘要】 为跟踪2004年6月19日至7月13日实施的黄河第三次调水调沙工程,2004年7月21日于东营胜利黄河大桥站位采集水样。对黄河下游悬浮物浓度、粒度分布进行了分析。结果表明,当天本站位悬浮物质量浓度为1.43 g/L,悬浮颗粒物粒度在63μm以下部分累积分布占99.3%。作者模拟汛期黄河下游河水的悬浮物浓度、年平均水温及pH,研究悬浮物对重金属Cu2+的吸附规律,并探讨了悬浮物浓度及盐度对吸附的影响。Cu2+在水体中会由于水解、絮凝、沉淀、络和等损失一部分,在研究吸附时对此部分进行了扣除。水体悬浮颗粒物对重金属Cu2+的吸附等温线吸附符合Langmuir方程。随悬浮物浓度的增加,其对Cu2+的吸附容量增大,吸附量减小。悬浮物浓度、pH一定时,在盐度为0~5时,吸附量随盐度的升高而迅速降低,当盐度在5~25时,吸附量基本不变。更多还原

【Abstract】 Adsorption of suspended particles is an important process controlling dissolved metal concentrations,bioavailability,and transport of trace metals.Samples used for the experiments were collected from Kenli,located at the lower-reaches of the Yellow River,in July 2004.The flux was 835 m3/s,salinity was 0.65,and the concentration of suspended particles was 1.43 kg/m3.Granularity of suspended particles below 63 μm accounts for 99.3%.Adsorption isotherm of Cu2+ can be characterized by Langmuir equation.Effects of different suspended particles concentrations and salinities on adsorption capacity have been discussed in this article.更多还原