高铁酸盐氧化絮凝去除水中腐殖质的研究

研究了高铁酸盐对饮用水中富里酸（ＦＡ）的去除性能与作用条件，考察了高铁酸盐单独氧化、氧化絮凝和与聚合氯化铝联合应用的除ＦＡ效果。结果表明，当高铁酸钾与ＦＡ的质量比为１２时，高铁酸盐氧化可以去除水中９０％以上的ＦＡ，在浑浊水中高铁酸盐具有氧化和絮凝的双重作用效能，同样高铁酸盐投加量下，可将９５％以上的ＦＡ去除。采取高铁酸盐与聚合铝联用可显提高对ＦＡ的去除效果。

Removal of fulvic acid from drinking water using ferrate

Removal efficiency of fulvic acid(FA) in drinking water using ferrate and the optimum conditions were investigated.The removal effects of FA by using oxidation and oxidation-coagulation of ferrate alone and combining application of ferrate and polyaluminium chloride(PAC) were also compared.Jar test was employed in the studies and the results of FA removal was analyzed spectrophotometrically.Ferrate exihibited good oxidation capacity on FA.The results have showed that about 90% of FA can be oxidized and removed from the water when weight ratio of ferrate to FA is 12:1.Adsorption of Fe(OH)3 precipitation produced by ferrate decomposition can also give FA an extra removal.In the presence of turbidity ferrate can conduct oxidation and coagulation simultaneously and over 95% of FA was eliminated with the same weight ratio of 12:1.Combining application of ferrate and PAC was more efficient for FA removal.2 mg/L FA could be entirely removed from synthetic drinking water by joint treatment of 8 mg/L ferrate and 0.8 mg/L PAC (by weight).