| 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。 |
| 关键词: 汛期 悬浮颗粒物 粒度分布 铜离子 吸附 |
| DOI： |
| 分类号: |
| 基金项目:国家973计划项目(2002CB412402);国家863计划项目(2006AA06Z362) |
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| Granularity distribution of the suspended particles and adsorption of Cu2+ from the Lower Reaches of the Yellow River during Flood Seasons |
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秦 洁
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| 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. |
| Key words: flood season suspended particles granularity distribution copper adsorbs ption |
