亚麻废纱制备纤维素基絮凝材料及其混凝工业废水性能  

Study on cellulose-based flocculant from flax yarn waste and its flocculation performance in treating industrial wastewater

作　　者：陈冬芝[1] 杨晓刚[1] 陈艳霞 刘琳[1] 陈彬 崔科丛[1] 张勇[1,3] CHEN Dongzhi;YANG Xiaogang;CHEN Yanxia;LIU Lin;CHEN Bin;CUI Kecong;ZHANG Yong(Zhejiang Sci-Tech University,Hangzhou,Zhejiang 310018,China;Tianjin Changwei Biotechnology Co.,Ltd.,Tianjin 300300,China;State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou,Guangdong 510640,China)

机构地区：[1]浙江理工大学,浙江杭州310018 [2]天津市昌维生物科技有限公司,天津300300 [3]华南理工大学制浆造纸工程国家重点实验室,广东广州510640

出　　处：《纺织学报》2020年第1期88-95,共8页Journal of Textile Research

基　　金：国家自然科学基金面上项目(61571002);浙江省公益技术应用研究项目(2017C31034);浙江省基础公益研究计划项目(LGF18C160002);制浆造纸工程国家重点实验室开放基金项目(201758)

摘　　要：为提升商业絮凝剂的絮凝效率及环境友好性,以亚麻废纱纤维素(FC)为基础原料,接枝聚丙烯酰胺(PAM),优化制备亚麻废纱纤维素基絮凝材料(FC-g-PAM),部分替代商业聚丙烯酰胺。借助红外光谱仪、场发射扫描电子显微镜、有机元素分析仪、X射线衍射仪、热重分析仪对FC-g-PAM的表观形貌和化学结构进行分析与表征,并考查其生物可降解性能,研究FC-g-PAM混凝处理印染、造纸和机械加工废水性能。结果表明:FC-g-PAM最优制备工艺为反应温度80℃、过硫酸铵用量0.30 g/g、PAM用量0.25 g/g、FC质量分数6%;FC-g-PAM热稳定性能优于FC,90 d生物降解率达68.5%;印染废水经FC-g-PAM混凝处理后浊度为17 NTU、色度为126倍、悬浮物含量为36 mg/L、COD Cr值为372 mg/L、BOD 5值为132 mg/L,混凝效果优于商业PAM。In order to improve the flocculation efficiency and environmental friendliness of commercial flocculants,flax waste cellulose(FC)was grafted with polyacrylamide(PAM)to prepare the FC-g-PAM for partial replacement of the commercial PAM.The morphology and chemical structure of the FC-g-PAM were characterized by FT-IR,field emission scanning electron microscopy,organic element analyzer,X-ray diffractometer and thermogravimetric analysis.Its biodegradability was also investigated.The flocculation performance of the FC-g-PAM in treating wastewater from dyeing,papermaking and mechanical processing were studied.The results showed that the optimal synthesis conditions for preparing FC-g-PAM were:reaction temperature 80℃,ammonium persulfate dosage 0.30 g/g,PAM dosage 0.25 g/g and FC concentration 6%.Thermal stability of FC-g-PAM was demonstrated better than that of FC and 90 d biodegradation rate reached 68.5%.After the flocculation of the FC-g-PAM,the turbidity of treated dyeing wastewater was 17 NTU,chromaticity at 126,supended matter content at 36 mg/L,COD Cr at 372 mg/L,BOD 5 at 132 mg/L.All these indices of FC-g-PAM indicate better flocculation performance than those of the commercial PAM.

关 键 词：亚麻废纱 纤维素基絮凝材料 混凝沉淀 印染废水 造纸废水 机械加工废水 

分 类 号：TS193.2[轻工技术与工程—纺织化学与染整工程]