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疏水可控纤维素基絮凝材料的制备及应用

发表时间:2018-03-30  浏览量:1162  下载量:136
全部作者: 金旭,张勇,王卫杰,田洋名,崔科丛,姚菊明
作者单位: 浙江理工大学材料与纺织学院
摘 要: 通过竹浆纤维素(bamboo pulp cellulose,BPC)与聚丙烯酰胺(PAM)自由基聚合,采用3-氨基丙基乙氧基硅烷(APTES)偶联剂对其进行疏水改性,制备疏水可控纤维素基絮凝材料(BPC-g-PAM-g-APTES),并通过优化混凝工艺对印染废水进行混凝处理以对其混凝能力和污泥减量性能进行评价。结果表明,BPC-g-PAM-g-APTES 在pH 值为3~11 范围内呈负电性。通过最优混凝工艺处理印染废水,印染废水平均浊度和化学需氧量(CODCr)去除率分别可达95.1%和97.0%,混凝过程形成的污泥沉降比(SV30)为11.3%,污泥比阻(SRF)为2.23×1012 m/kg,与经商业PAM 混凝处理的印染废水的平均浊度和CODCr 去除率(分别为75.2%和85.7%)以及SV30 和SRF(分别为30.6%和15.1×1012 m/kg)相比可知,BPC-g-PAM-g-APTES 的 废水混凝效果和污泥减量性能优势均较为明显。
关 键 词: 环境工程学;纤维素;3-氨基丙基乙氧基硅烷;疏水改性;絮凝材料;污泥减量
Title: Preparation and application of hydrophobic controllable cellulose based flocculant
Author: JIN Xu, ZHANG Yong, WANG Weijie, TIAN Yangming, CUI Kecong, YAO Juming
Organization: School of Materials and Textiles, Zhejiang Sci-Tech University
Abstract: A hydrophobic controllable cellulose based flocculant (BPC-g-PAM-g-APTES) was synthesized by the free radical polymerization of bamboo pulp cellulose (BPC) and polyacrylamide (PAM) as well as hydrophobic modification with 3-aminopropylethoxysilane (APTES) coupling agent. Its coagulation and sludge reduction performance were evaluated through the treatment of optimized coagulation on dyeing wastewater. The results showed that the BPC-g-PAM-g-APTES appeared negative charged in the pH range of 3-11. The average removal rates of average turbidity and CODCr reached 95.1% and 97.0%, respectively. The SV30 and SRF of coagulation sludge exhibited as 11.3% and 2.23×1012 m/kg. The removal rates of average turbidity and CODCr reached 75.2% and 85.7%, respectively; SV30 and SRF exhibited as 30.6% and 15.1×1012 m/kg, respectively by commercial PAM. These data confirmed that the coagulation capacity and sludge reduction performance of BPC-g-PAM-g-APTES were obviously better than those of commercial PAM during the coagulation of dyeing wastewater.
Key words: environmental engineering; cellulose; 3-aminopropylethoxysilane; hydrophobic modification; flocculant; sludge reduction
发表期数: 2018年3月第6期
引用格式: 金旭,张勇,王卫杰,等. 疏水可控纤维素基絮凝材料的制备及应用[J]. 中国科技论文在线精品论文,2018,11(6):621-627.
 
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