有机酸改性荞麦秸秆及铅污染灌溉水净化工艺研究  

Study on Purification Process of Lead Polluted Irrigation Water by Organic Acid Modified Buckwheat Straw

作　　者：陈勇刚 张华军 CHEN Yong-gang;ZHANG Hua-jun(Jiangsu Baoze Polymer Material Limited Company,Jiangsu Suzhou 215431,China)

机构地区：[1]江苏宝泽高分子材料股份有限公司,江苏苏州215431

出　　处：《广州化工》2018年第12期58-60,共3页GuangZhou Chemical Industry

基　　金：江苏省科技厅2015重点研发计划(社会发展-面上项目)(BE2015649)

摘　　要：为了增强荞麦秸秆对灌溉水中重金属铅离子的吸附力,利用柠檬酸、苹果酸、酒石酸、草酸及亚氨基二乙酸对荞麦秸秆进行改性。红外光谱表明,改性后秸秆吸附剂表面的羰基量有极大提升,其中柠檬酸改性后的羰基峰最强。吸附试验表明,改性前荞麦秸秆对铅离子的吸附力为3.2 mg/g,柠檬酸、苹果酸、酒石酸、草酸以及亚氨基二乙酸改性后分别增强至66.1、55.4、44.5、52.3及36.8 mg/g,吸附力提升了10倍以上。In order to enhance the adsorption capacity of buckwheat stalks to heavy metals and lead ions in irrigation water,buckwheat straw was modified by citric acid,malic acid,tartaric acid,oxalic acid and iminodiacetic acid. The infrared spectra showed that the carbonyl content on the surface of the modified straw adsorbent was greatly enhanced,and the carbonyl peak of the modified citric acid was the strongest. The adsorption test showed that the adsorption capacity of the unmodified buckwheat straw for Pb ion was 3. 2 mg/g,and the adsorption of the citric acid,malic acid,tartaric acid,oxalic acid and iminodiacetic acid modified adsorbents increased to 66. 1, 55. 4, 44. 5, 52. 3 and 36. 8 mg/g,respectively,and the adsorption capacity increased by 10 times.

关 键 词：荞麦秸秆 有机酸 改性 铅离子 灌溉水 

分 类 号：O636.1[理学—高分子化学]