改性玉米须纤维及其对土碱中砷(Ш)的吸附  

Modified Corn Silk Fiber and Its Arsenic(Ш)Adsorption in Soil Alkali

作　　者：周璇[1] 赵馀 鞠双桥 刘谋盛[1] 

机构地区：[1]昆明理工大学生命科学与技术学院,云南昆明650500 [2]昆明理工大学现代农业工程学院,云南昆明650500

出　　处：《材料科学与工程学报》2015年第5期748-753,767,共7页Journal of Materials Science and Engineering

基　　金：云南省教育厅科学研究基金资助项目(2010Z016)

摘　　要：研究了用柠檬酸和三氯硫磷改性的玉米须对食品添加剂土碱中砷(Ш)的吸附工艺。结果表明,改性玉米须纤维(F1和F2)表面疏松、多孔,负电子基团含量增加,增强了与砷(Ш)配位结合的能力。最佳条件下,与对照组天然玉米须纤维(FN)相比,F1和F2的脱砷率分别提高了2.89倍和1.95倍,FN、F1和F2处理过的土碱回收率可达到96.85%、94.32%和95.45%,该研究对土碱中砷含量控制具有重要意义。The adsorption process of corn silk fibers modified by citric acid and thiophosphoryl chloride,as new adsorbent for removing arsenic（Ш）in food additives soil alkali,was investigated.The results show that the surface of modified corn silk fiber（F1and F2）is loose and porous,and the increase of negative electron group in fiber molecular makes its coordination combining ability with arsenic（Ш）enhanced;Under the best experimental conditions,comparing with FN,the arsenic removal rates of F1 and F2significantly increase by 2.89 fold and 1.95 fold,respectively.The rate of recovery of soil alkali,treated by FN,F1 and F2,reach to 96.85%,94.32%and 95.45%,respectively.This study is of great significance on soil alkaline arsenic content control.

关 键 词：柠檬酸 三氯硫磷 玉米须 食品添加剂土碱中的砷 脱砷率 

分 类 号：TQ352[化学工程]