中国农业科技导报2024，Vol.26Issue(5)：167-173,7.DOI:10.13304/j.nykjdb.2022.1113
基于农作物秸秆的絮凝剂制备及其效果研究
Study on Preparation and Effect of Flocculant Based on Crop Straw
摘要
Abstract
In order to develop a novel natural polymer flocculant based on crop straw,cellulose was extracted from 3 crop straws of corn,rice and wheat by nitric acid-ethanol method,and copolymerized with methacryloxyethyltrimethyl ammonium chloride(DMC)in homogeneous aqueous solution(reaction temperature of 30,40,50 and 60 ℃)to generate straw cellulose grafted methacryloxyethyltrimethyl ammonium chloride flocculant(SC-g-DMC).The results showed that the best cellulose content of the 3 crops after straw extraction was(69.8%±1.7%),and the best grafting rate of the samples was(36.9%±3.1%).Infrared spectroscopy and scanning electron microscopy(SEM)confirmed the successful grafting of monomers to the cellulose surface of straw.The flocculation effect of SC-g-DMC on dairy farm sewage showed that under different reaction temperatures,the pollutant removal efficiency first increased and then decreased with the rise of reaction temperature.The SC-g-DMC prepared at 40℃ had the best flocculation effect.The removal rate of chemical oxygen demand,turbidity and total suspended solids of 100 mg·L-1 SC-g-DMC on dairy wastewater was(13.9%±2.3%),(30.6%±5.6%)and(33.8%±0.9%),respectively.Above results showed that the flocculant had a good application prospect and could provide basic data for the application of new natural polymer flocculants.关键词
絮凝剂/秸秆纤维素/接枝/奶牛厂污水Key words
flocculant/straw cellulose/graft/dairy farm sewage分类
农业科技引用本文复制引用
蔡阳扬,陶秀萍,董红敏,李同,尚斌,宋建超,刘崇涛,刘壮壮..基于农作物秸秆的絮凝剂制备及其效果研究[J].中国农业科技导报,2024,26(5):167-173,7.基金项目
国家现代农业产业技术体系建设项目(CARS-36) （CARS-36）
中国农业科学院科技创新工程项目(ASTIP-IUA-2022001). （ASTIP-IUA-2022001）
