【摘要】：聚合氯化鋁廣泛用于給水混凝處理中。但在不同水質條件下其混凝效果報導不一。本文在PACl水解絮凝體系特性的研究基礎上，，使用實驗室自制PACl混凝高嶺土懸濁液，研究了配水水質、不同高嶺土粒徑等因素對PACl混凝高嶺土懸濁液后Zeta電位、粒徑分布及濁度去除率的影響。 研究發(fā)現：(一)自制PACl在最佳投加量下混凝純水配制的小粒徑高嶺土效果較差，濁度去除率最好為B=2.5的PAC在pH=9時混凝懸濁液，達到14.89%；使用PACl混凝自來水配水水樣的除濁效果較好，濁度去除率最大值出現在pH=9處，去除率最大為45.3%；一定量的NaCl與CaSO4加入純水配制的高嶺土懸濁液后略能提高混凝效果。(二)投加量均為0.04mM時，PACl混凝平均粒徑2.7μm高嶺土懸濁液的濁度去除率與混凝平均粒徑489nm高嶺土懸濁液的濁度去除率相差不大，而當增大PACl的投加量為0.4mM，提高pH至9時，混凝的濁度去除率可達到較大值91.79%；在pH=8時，HA的加入對濁度去除率略有降低，并且HA投加量越大，混凝效果越不好；10mg/L的硫酸根的加入可提高混凝除濁率；在pH=9，PACl投加量達到0.2mM時其濁度去除率已達到86.95%，投加量增大至0.4mM，其濁度去除率達到93.7%；混凝不同濁度的懸濁液，其濁度去除率隨濁度變化不大。(三)工業(yè)PACl混凝小粒徑高嶺土的除濁效果比自制PACl混凝效果更差。
[Abstract]:Polyaluminium chloride is widely used in coagulation treatment of feed water. But under different water quality conditions, the effect of coagulation is different. Based on the study of the characteristics of PACl hydrolytic flocculation system, the effects of water quality and particle size of PACl coagulation kaolin suspension on Zeta potential after PACl coagulation kaolinite suspension were studied by using laboratory self-made PACl coagulation kaolin suspension. Effect of particle size distribution and turbidity removal efficiency. The results are as follows: (1) the effect of small diameter kaolin prepared by self-made PACl at the best dosage is poor, and the turbidity removal rate is best for PAC with BX 2.5 at pH= 9, reaching 14.89; The turbidity removal effect of PACl coagulated tap water sample was better, the maximum turbidity removal rate appeared at pH=9, and the maximum removal rate was 45.3.The addition of a certain amount of NaCl and CaSO4 into kaolin suspension prepared by pure water could slightly improve the coagulation effect. (2) when the dosage of PACl was 0.04mM, the turbidity removal efficiency of PACl coagulating average diameter of 2.7 渭 m kaolin suspension was not different from that of 489nm kaolin suspension, but when the dosage of PACl was 0.4 mm, With the increase of pH to 9, the turbidity removal rate of coagulation can reach a larger value of 91.79. At pH= 8, the turbidity removal rate decreased slightly with the addition of HA, and the coagulation effect was worse with the increase of HA dosage, and the turbidity removal rate of coagulation was increased with the addition of sulfate of 10mg/L. When the dosage of pH=9,PACl reached 0.2mM, the turbidity removal rate reached 86.95%, and the turbidity removal rate increased to 0.4mMand the turbidity removal rate reached 93.7.The turbidity removal rate of the suspended turbidity solution with different turbidity coagulated had little change with turbidity. (3) the turbidite removal effect of industrial PACl coagulation with small diameter kaolin is worse than that of self-made PACl.
【學位授予單位】：西安建筑科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TU991.2

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