絮凝作用
阳离子聚合
化学
淀粉
吸附
嫁接
氯化铵
化学工程
核化学
腐植酸
聚合物
有机化学
工程类
肥料
作者
Yuyang Wu,Xiangyu Jiang,Jie Ma,Jingbo Wen,Shuang Liu,Hongxia Liu,Huaili Zheng
标识
DOI:10.1016/j.carbpol.2021.118379
摘要
A kind of starch-based flocculant (starch-graft-poly[(2-methacryloyloxyethyl) trimethyl ammonium chloride], denoted St-g-PDMC-LPUV) has been synthesized by low-pressure ultraviolet initiation and was employed to remove humic acid (HA) for water purification. The physicochemical characteristics of starch and St-g-PDMC-LPUV were characterized by FT-IR, 1H NMR, XRD, TGA, SEM and BET to confirmed the successful grafting DMC onto starch. Effects of flocculant dosage, pH, the adding amount of Fe3O4, initial HA concentration and stirring speed were investigated systematically. The prepared St-g-PDMC-LPUV flocculant with non-toxic, biodegradability and environmental friendliness exhibited effective performance for removing HA from water in a wide pH range (5–10). The flocculation mechanism was attributed to the effective collision between function groups of the St-g-PDMC-LPUV flocculant and HA by charge neutralization, adsorption, bridging and patching.
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