NaOH改性沸石对硬水软化的试验研究

Experimental Study on Softening of Hard Water by NaOH Modified Zeolite

为了保证临汾某矿区周边居民饮用的地下水符合地下水质量标准,在分析矿区水文地质条件的基础上,利用改进的内梅罗指数法对该矿区地下各含水层进行水质评价,研究了NaOH溶液改性的沸石对第三含水层水样的处理效果,并探讨了NaOH浓度、改性时间和沸石用量对Ca^(2+)、Mg^(2+)吸附效果的影响。结果表明:当NaOH溶液的浓度为0.8 mol/L、改性时间为30 min、沸石用量为1.0 g时,所取水样中剩余Ca^(2+)、Mg^(2+)的质量浓度分别为143.64 mg/L、89.21 mg/L,总硬度降低至512.26 mg/L,经计算改进的内梅罗综合污染指数P为0.91,达到了饮用水的III类标准。

In order to ensure that the groundwater consumed by the residents around a mining area at Linfen conforms to the groundwater quality standard.We use the improved Nemero exponent method to evaluate the water quality of the underground aquifers in the mining area based on the analysis of hydrogeological conditions in mining areas.The effect of zeolite modified by NaOH solution on the treatment of water samples from the third aquifer was studied.The effects of NaOH concentration,modification time and the amount of zeolite on the adsorption of Ca2+and Mg2+were also discussed.The results showed that when the concentration of NaOH solution was 0.8 mol/L,the modification time was 30 min and the dosage of zeolite was 1.0 g,the concentration of residual Ca2+and Mg2+in the water sample was 143.64 mg/L and 89.21 mg/L respectively,and the total hardness decreased to 512.26 mg/L,the improved Nemero composite pollution index P was calculated to be 0.91,which was up to the III standard of drinking water.