摘要
以硅藻土和纤维素为原料,通过溶胶-凝胶法制备出了新型硅藻土/纤维素复合助滤剂,探究了各种制备条件对助滤剂的影响,并在高岭土悬浊液中对硅藻土、纤维素和硅藻土/纤维素的助滤性能进行了比较,同时研究了硅藻土/纤维素助滤剂对实际微污染水过滤的影响。研究结果表明:复合助滤剂的最佳制备条件为纤硅比0.67,氨水浓度5.0×10^(-4)mol/L,蒸馏水/纤维素40mL/g,EtOH/硅藻土20mL/g,60℃恒温水浴;硅藻土/纤维素复合助滤剂的助滤性能要明显优于硅藻土和纤维素助滤剂;在微污染原水直接过滤过程中,投加硅藻土/纤维素助滤剂可提高各微污染物的去除率,结合微滤膜深度处理工艺,最终出水水质满足《生活饮用水卫生标准》(GB 5749—2006)的要求。
The diatomite/cellulose filter aids were prepared using raw diatomite and cellulose via sol-gel technique. The effect of cellulose/diatomite, distilled water/cellulose, EtOH/diatomite,ammonia concentration and temperature on the properties of diatomite/cellulose filter aids were investigated.The filtration efficiency of diatomite,cellulose and diatomite/cellulose filter aids was compared.The influence of diatomite/cellulose filter aids on slightly polluted water filtration was studied.Results indicated that when 40 mL distilled water dissolved 1.0g cellulose,20 mLEtOH carried 1.5g diatomite,the ratio of diatomite to cellulose was 0.67,the concentration of ammonia was 5×10-4 mol/L,the temperature was 60℃,the best diatomite/cellulose filter aids were achieved.The efficiency of diatomite/cellulose filter aids was obviously better than that by diatomite and cellulose filter aids.The pollutants removal efficiency could increase by using the diatomite/cellulose filter aids in the direct filtration process to treat the micro-polluted raw water.The results showed that the combination of filtration and micro-filtration membrane could achieve excellent permeate water,which met the Standards for Drinking Water Quality（GB5749—2006）.
出处
《土木建筑与环境工程》
CSCD
北大核心
2016年第3期90-95,共6页
Journal of Civil,Architectural & Environment Engineering
基金
武汉理工大学自主创新研究基金(155206009)~~
关键词
硅藻土
纤维素
助滤剂
助滤性能
微污染原水
diatomite
cellulose
filter aids
filter performance
micro-polluted raw water
