SDS/Al^(3+)复合改性膨润土制备及氨氮废水的吸附处理试验  

Preparation of SDS/Al^(3+) Composite Modified Bentonite and Adsorption Treatment of Ammonia Nitrogen Wastewater

作　　者：邵红 张广兴 李云娇 孙晓宇 Shao Hong;Zhang Guangxing;Li Yunjiao;Sun Xiaoyu(Shenyang University of Chemical Technology,Shenyang 110142,China)

机构地区：[1]沈阳化工大学环境与安全工程学院,辽宁沈阳110142

出　　处：《净水技术》2017年第11期55-61,66,共8页Water Purification Technology

基　　金：国家科技重大专项课题"水体污染控制与治理"(2012ZX07505-002)

摘　　要：采用十二烷基硫酸钠(SDS)与六水氯化铝(AlCl_3·6H_2O)复合改性膨润土制备具有较高吸附性能的改性膨润土,同时研究了复合改性膨润土对氨氮废水的处理效果。通过单因素试验得出AlCl_3·6H_2O与SDS复合改性膨润土的最佳制备条件:SDS/膨润土质量分数为8%,AlC1_3·6H_2O质量浓度为50mg/mL,搅拌时间为30 min,搅拌速度为350 r/min,搅拌温度为40℃。对得到的复合改性膨润土进行表征,再用其处理氨氮废水,得到最佳工艺条件:投土量为3 g,搅拌时间为20 min,搅拌速度为200 r/min。氨氮废水浓度为300 mg/L时,氨氮去除率达88.41%。Composite modified bentonite with high adsorption capacity was prepared by the application of sodium dodecyl sulfate （SDS） and aluminum chloride hexahydrate （AlCl3 · 6H2O） . Meanwhile,effect of the composite modified bentonite for treatment of ammonia nitrogen wastewater was investigated. According to the results of single factor experiment,the best preparation conditions of the composite modified bentonite were obtained,where the weight ratio of SDS/bentonite was 0.8,mass concentration of AlCl3 · 6H2O was 6%,stirring time was 30 min,stirring rate was 350 r/min,and stirring temperature was 40 丈.Characteristics of the composite modified bentonite was studied. Then,the best processing conditions were found out for the treatment of ammonia nitrogen wastewater by the use of composite modified bentonite,where the dosage of Al _ S _ B was 3 g,stirring time was 20 min,stirring rate was 200 r/ min. When concentration of ammonia nitrogen was 300 mg/L,removal rate of ammonia nitrogen was 88.41%.

关 键 词：复合改性膨润土 十二烷基硫酸钠(SDS) 水合氯化铝 吸附 氨氮去除 

分 类 号：X505[环境科学与工程—环境工程]