生物学杂志

生物学杂志 ›› 2022, Vol. 39 ›› Issue (2): 84-.doi: 10.3969/j.issn. 2095-1736.2022.02.084

• 研究报告 • 上一篇    下一篇

新型磁性絮凝剂的制备及其在农村黑臭水体治理中的应用

  

  1. 1. 安徽大学 资源与环境工程学院， 合肥230601；
    2. 中国科学院南京地理与湖泊研究所湖泊与环境国家重点实验室， 南京210008
  • 出版日期:2022-04-18 发布日期:2022-04-18
  • 通讯作者: 李玉成，教授，从事环境生物地球化学和水污染防治研究，E-mail：Li-yucheng@163.com
  • 作者简介:王顺永，硕士研究生，主要从事水污染防治研究，E-mail：507741230@qq.com
  • 基金资助:
    派河小流域山林地水源涵养技术筛选验证与应用推广项目（2017ZX07603002-001）

Synthesis of new type magnetic flocculant and its application in the treatment of rural black-odorous water

  1. 1. School of Resources and Environmental Engineering, Anhui University, Hefei 230601， China;
    2. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology,
    Chinese Academy of Sciences, Nanjing 210008， China
  • Online:2022-04-18 Published:2022-04-18

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摘要： 以没食子酸（GA）改性纳米Fe3O4，再与改性壳聚糖（mCTS）复配制备一种新型磁性絮凝剂mCTS@(PGA-Fe3O4)，用絮凝法处理农村黑臭水体。考察在不同制备条件下mCTS@(PGA-Fe3O4)的絮凝效果，并运用响应面法对PAM与mCTS@(PGA-Fe3O4)的絮凝条件进行优化验证。结果表明，mCTS@(PGA-Fe3O4)的最佳制备条件为GA用量0.3g，Fe3O4改性温度60℃，AM用量3g，引发剂用量0.03g和聚合温度60℃。根据响应面实验所拟合响应值的分布情况确定mCTS@(PGA-Fe3O4)的最佳絮凝条件：投加量0.38g/L、pH7.42、温度25.2℃，在该条件下浊度、色度和COD的去除率分别为92.0%、84.2%和79.9%，絮凝效果优于PAM。且该絮凝剂在重复利用3次后仍具有一定的絮凝效果，表明mCTS@(PGA-Fe3O4)在农村黑臭水体治理中有良好的应用前景。

关键词: 磁性絮凝剂, 农村黑臭水体, 响应面法, 絮凝效果

Abstract: The nano Fe3O4 was modified by gallic acid(GA) and then was mixed evenly with modified chitosan to synthesize a composite magnetic flocculant mCTS@(PGA-Fe3O4), which was used to flocculate the rural black-odorous water. The flocculation effect of mCTS@(PGA-Fe3O4) under different synthetic conditions was investigated. Meanwhile, the flocculation conditions of PAM and mCTS@(PGA-Fe3O4) by response surface method were optimized. Results suggested that the optimized synthetic conditions of mCTS@(PGA-Fe3O4) were: GA dosage 0.3 g, Fe3O4 modified temperature 60℃, AM dosage 3 g, trigger mass 0.03 g and polymerization temperature 60℃. Based on the distribution of response values, the optimum operating conditions were flocculant mCTS@ (PGA-Fe3O4) 0.38 g/L, pH 7.42, and temperature 25.2℃. Under this condition, the removal rates of turbidity, color and COD were 92.0%, 84.2% and 79.9%, respectively flocculation effect was better than that of PAM.In addition, reused experiments results suggested that the flocculant still had good flocculation effect after reusing three times. This work indicated that the mCTS@(PGA-Fe3O4) possessed a good application prospect in the treatment of black-odorous water in future.

Key words: magnetic flocculant, rural black-odorous water, response surface method, flocculating efficiency

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