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目前硝酸盐污染已对饮用水安全构成了一定威胁,随着未来饮用水指标的提高,利用绿色处理方法去除硝酸盐有着迫切的实际需求。在精确pH条件下利用微电解法去除硝酸盐对饮用水出水不会产生影响。实验结果表明:对进水硝酸盐浓度为30 mg/L体系下的单因素进行连续实验,当进水pH=3.12时可取得最佳去除效果,最高去除率为68.7%;当进水pH=3.52时,系统的硝酸盐去除效果最差,最高去除率仅为56.1%;当铁碳质量比为3∶1时可取得最佳去除效果,稳定阶段硝酸盐去除率在80%以上,最高去除率为85.7%;硝酸盐去除率随水力停留时间的增加而提高,当水力停留时间为60 min时,最高去除率达93.2%。
At present, nitrate pollution has posed a certain threat to the safety of drinking water. With the improvement of drinking water indicators in the future, there is a pressing practical need to remove nitrates by means of green treatment. The use of microelectrolysis to remove nitrates from drinking water does not have an effect at the exact pH. The experimental results showed that the best single factor was obtained when the influent nitrate concentration was 30 mg / L. When the influent pH was 3.12, the best removal efficiency was achieved, with the maximum removal efficiency of 68.7% 3.52, the removal efficiency of nitrate was the worst, the highest removal rate was only 56.1%. When the mass ratio of iron and carbon was 3:1, the best removal efficiency was obtained. The removal rate of nitrate was above 80% The rate of nitrate removal increased with the increase of hydraulic retention time, and the maximum removal rate reached 93.2% when the hydraulic retention time was 60 min.