摘要
以钠基蒙脱石(Na-MMT)为原料,十六烷基三甲基溴化铵(CTAB)为改性剂,水相合成法制备了有机改性蒙脱石(OMMT),用于吸附污水中有机污染物,降低污水化学需氧量(COD)值。所制备的有机改性蒙脱石经XRD、FTIR表征,结果显示CTAB已经插入蒙脱石层间,层间距有明显增大,d(001)从未改性前的1.53nm增大到2.53nm。水样COD测定结果表明,将其用于COD=503.8mg/L的污水,pH=7,有机改性蒙脱石用量1.0g/100mL,吸附时间1h时,可使COD降至46.3mg/L,COD去除率达90.8%。
Organic montmorillonite（OMMT） was prepared by aqueous synthetic approaches when Na-MMT was modified with cetyltrimethyl ammonium bromide（CTAB）.It was used in adsorption of organic pollutants to reduce COD（chemical oxygen demand） of sewage.The OMMT was characterized by XRD and FTIR.The results indicated that the interlayer distance increased from about 1.53nm to 2.53nm after intercalation of CTAB into its layers.The results of the COD determination showed that,when pH=7,the OMMT dosage was 1g/100mL and adsorption time was 1 hour,its removal rate of sewage could reach 90.8%.The concentration of COD was reduced from 503.8mg/L to 46.3mg/L.
出处
《光谱实验室》
CAS
2013年第4期2004-2009,共6页
Chinese Journal of Spectroscopy Laboratory
基金
西安市科技计划项目西安文理学院科研创新基金专项项目资助(CXY1134WL35)
西安文理学院分析化学陕西省级重点学科资助
