巢湖湖岸砂石的磷吸附特性研究
Research on phosphorus adsorption properties of sandstone from Chao Lake shore
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摘要: 以巢湖湖岸上富含铁、铝、锰等元素的砂石为实验材料，研究其对水体中磷的吸附效果。实验表明：在砂石对磷的吸附过程中，同时存在着物理吸附和化学吸附，且以化学吸附作用为主，符合准二级动力学模型；砂石对磷的作用与溶液初始磷浓度有关，磷释放与吸附的临界浓度点约为0.04 mg/L；砂石对磷的吸附符合Langmuir等温吸附方程，最大吸附量约为1 428.57 mg/kg，对磷的吸附效果比普通沙石要好，且经济易得。Abstract: The sandstone in Chao Lake shore， which rich in iron， aluminum， manganese and other elements， was used to study the adsorption of phosphorus in water. Results show that there is both physisorption and chemisorption in the adsorption process， and chemisorption is dominant. The adsorption process accords with the quasi secondary dynamic model. The adsorption effect is related with initial phosphorus concentration， and the critical concentration point of phosphorus release and adsorption is about 0.04 mg/L. The phosphorus adsorption generated by sandstone accords with Langmuir isotherm equation， and the maximum absorption capacity is about 1 428.57 mg/kg. The peculiar sandstone is better than ordinary sandstone in phosphorus adsorption， which is economically available.
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Key words:
- Chao Lake /
- sandstone /
- absorption /
- phosphorus
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