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| 粘土矿物对环境污染的防治作用 | |
| 引用本文： | 鲁春霞,于云江,吴俊平.粘土矿物对环境污染的防治作用[J].中国沙漠,1999,19(3):265-267. |
| 作者姓名： | 鲁春霞 于云江 吴俊平 |
| 作者单位： | 1. 中国科学院,兰州沙漠研究所,甘肃,兰州,730000 2. 兰州铁路局,科学研究所,甘肃,兰州,730000 3. 内蒙古包头市红旗农场林场,内蒙古,包头,014000 |
| 摘 要： | 粘土矿物具有比表面积大、孔隙多以及极性强等特征，因而有较强的吸附性、离子交换性和膨胀性，对水体中各种类型的污染物质有良好的吸附性能，并使土壤有一定的自净作用。粘土矿物的膨胀性及低导水率使它能作为有效的密封物质，在放射性废料的埋置过程中产生理想的封闭作用。另外由于粘土矿物成本低、再生容易，所以在环境污染的防治中有广阔的应用前景 |
| 关 键 词： | 粘土矿物 环境污染 防治 |
The Preventing and Controlling Role of Clay Mineral Against Environmental Pollution |
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| LU Chun-xia,YU Yun-jiang,WU Jun-ping.The Preventing and Controlling Role of Clay Mineral Against Environmental Pollution[J].Journal of Desert Research,1999,19(3):265-267. | |
| Authors: | LU Chun-xia YU Yun-jiang WU Jun-ping |
| Abstract: | Clay mineral belongs to silicate minerals. With layer structure, inter layer electric charges and chemical bond, clay mineral is characterized by unique polarity, high porosity and large surface area, thus, clay is capable of absorption, ion exchanging and swelling. Based on these properties, clay mineral can serve as very effective sorbent of environmental pollutants. Pollutants of waterbody mainly come from industrial wastewater and the use of chemical fertilizer, which include inorganic materials such as heavy metal and chloride et al. , and organic ones as pesticide chlorophenols and oil et al.. Contrast to active carbon, most kinds of clay minearls have not only abundent deposits but also low cost of regeneration. Moreover, the absorption of modified clay can be enhanced several times as high as its usual. As the main part of soil colloid, clay minerals all carry some electric charges and can exchange ion in soil. While toxicants permeated through soil, soil colloid may absorb the ions with reverse charges and then some of the ions can be solided in the composition of clay. Therefore, the activity and diffusion of pollutants are limited and the soil with clay mineral make it self clean up. With lower hydraulic conductivity and swelling potential clay mineral is regarded as an ideal sealant, which is widespreadly used in getting rid of radioactive waste. Based on the above properties clay mineral will open its vast prospect in the application of environmental pollution control. |
| Keywords: | clay mineral environmental pollution prevention and control |
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