地下水砷污染防治试验研究

Experimental study on prevention and control of groundwater arsenic contamination

针对我国地下水砷污染及饮用水质健康风险问题,以地下水中砷这种特征污染物的净化及安全供水为研究目标,为了寻求治理地下水砷污染途径,提出了石英砂原位改性除砷的方法。采用化学沉淀法制备改性石英砂,在室内开展镀铁条件试验研究,确定注入试剂种类、注入方式、持续时间及强度等重要参数。进而,对改性石英砂进行了表面特征分析并开展了静态吸附试验和动态除砷试验。研究成果旨在为我国地下水污染控制和饮用水安全供给工程提供相关的技术支撑。

Aiming at the problem of groundwater arsenic contamination and the health risk from the quality of drinking water in Chi- na, the removal of the specific pollutant--arsenic in groundwater and the safe water supply are taken as the study objective for searching the approach for prevention and control of groundwater arsenic contamination, and then the method of removing arsenic with the in-situ modified quartz sand is put forward herein. The modified quartz sand is prepared by chemical precipitation and the relevant indoor experimental study is made under the iron-plating condition for determining the important parameters such as the kind, injecting mode, duration and strength of the of the sample to be injected. Moreover, the surface feature of the modified quartz sand is analyzed and beth the static adsorption experiment and dynamic experiments of arsenic removal are carried out as well. The study result can provide the relevant technical support for control of groundwater pollution and safe supply of drinking water in China.