摘要
以钠基膨润土为原料,CTMAB、CPAM为改性剂制备复合改性膨润土。探讨了最佳制备条件为：CTMAB投加量2 mmol,CPAM投加量0.03 g,原土投加量6 g,搅拌速度200 r/min,改性时间大于1.5 h。FTIR和XRD对复合改性膨润土进行表征,表明CTMAB、CPAM进入膨润土层间,扩大了膨润土的层间距从而提高了吸附性能。在原水浓度191 600 mg/L,改性土投加量2 g,搅拌时间1~3 h,pH值6~8,搅拌速度200~300 r/min,离心速度1 400 r/min,离心时间2 min的工艺条件下,制药废水COD去除率可达70%。吸附动力学研究结果表明准二级动力学模型能很好地描述膨润土复合材料对制药废水的吸附过程。
Composite bentonite was prepared with sodium bentonite as raw material, CTMAB and CPAM as modifier. Optimal preparation conditions were CTMAB dosage 2 mmol, CPAM dosage 0.03 g, sodium bentonite dosage 6 g, stirring speed 200 r/min, modification time more than 1.5 h. FTIR and XRD results showed that CTMAB, CPAM were entered into bentonite layers, which improved the adsorption properties of bentonite by expanding the interlayer spacing. COD removal rate was up to 70% under the conditions of the concentration of raw water less than 191 600 mg/L, modified bentonite dosage 2 g, stirring time 1 -3 h, stirring speed 200-300 r/min, pH 6-8, centrifugal speed more than 1 400 r/min and centrifugation time more than 2 rain. Kinetic results showed that quasi-two kinetic model can describe composite bentonite material for pharmaceutical wastewater adsorption process.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2014年第7期117-123,共7页
Environmental Science & Technology
基金
国家水体污染控制与治理科技重大专项:辽河流域主要污染物排放控制研究及管理体系建设(2011ZX07530-02)
