竹浆纤维素基绿色混凝材料混凝标准高岭土悬浊液的机理  

Flocculation mechanism of a bamboo pulp cellulose-based flocculation material in standard kaolin suspension

作　　者：胡雪怡 来雷 梁福根 杨飞 张秀梅 张勇[1] HU Xueyi;LAI Lei;LIANG Fugen;YANG Fei;ZHANG Xiumei;ZHANG Yong(Key Laboratory of Advanced Textile Materials and Manufacturing Technology,Ministry of Education,Zhejiang Sci-Tech University,Hangzhou 310018,China;Zhejiang Transfar Whyyon Chemical Co.,Ltd.,Hangzhou 311231,China;Zhejiang Yubo New Material Co.,Ltd.,Taizhou 318000,China)

机构地区：[1]浙江理工大学先进纺织材料与制备技术教育部重点实验室,杭州310018 [2]浙江传化华洋化工有限公司,杭州311231 [3]浙江宇博新材料有限公司,浙江台州318000

出　　处：《浙江理工大学学报（自然科学版）》2022年第1期16-22,共7页Journal of Zhejiang Sci-Tech University(Natural Sciences)

基　　金：浙江省重点研发计划项目(2020C04015,2021C03160);浙江省基础公益研究计划项目(LGF18C160002,LY19C160010);杭州市农业与社会发展科研项目(20191203B28)。

摘　　要：混凝是化学处理法处理印染废水过程中的重要环节,研究混凝机理有助于进一步指导印染废水混凝过程混凝剂的开发与应用。将聚丙烯酰胺接枝到竹浆纤维素骨架上,制备环境友好、安全高效的竹浆纤维素基绿色混凝材料(BPC-g-PAM),然后利用FESEM、FTIR、XRD、Zeta电位仪对其进行物理特性和化学结构表征,并将BPC-g-PAM应用到高岭土悬浊液的混凝处理过程,重点考察其在不同pH条件下的混凝机理。结果表明:BPC-g-PAM为阴离子型混凝材料,在酸性条件下的主要机理为电中和作用中性条件下的主要作用机理为静电簇作用,在碱性条件下则以黏接架桥机理为主。该研究结果可为进一步减少PAM的使用和污水的后续处理等提供参考。Flocculation is an important link in the chemical treatment of printing and dyeing wastewater. To guide the development and application of flocculants in the flocculation process of printing and dyeing wastewater, its flocculation mechanism was investigated. In this work, a bamboo pulp cellulose-based flocculation material(BPC-g-PAM) was prepared by grafting polyacrylamide onto the bamboo pulp cellulose skeleton, which was eco-friendly, safe and efficient. Then FESEM, FTIR, XRD AND Zeta potentiometers were employed to characterize physical properties and chemical structure of BPC-g-PAM. Meanwhile, the as-prepared BPC-g-PAM was applied to the flocculation process of kaolin suspension, and its flocculation mechanism under different pH conditions was emphatically investigated. The results showed that the BPC-g-PAM was a kind of anionic flocculation material. The main flocculation mechanism was charge neutrality under acidic conditions;patching was the main mechanism under the neutral conditions bonding bridging is the main under alkaline condition. The research finding can provide reference for further minimizing the use of PAM and subsequent treatment of sewage.

关 键 词：竹浆纤维素 纤维素基混凝材料 印染废水 混凝机理 高岭土悬浊液 

分 类 号：X703[环境科学与工程—环境工程]