新型助凝剂海藻酸钠的助凝效能及作用机制研究

祝苑; 潘丁瑞; 汪艳; 成淑媛; 王立章; 王倩; 赵爽

doi:10.12153/j.issn.1674-991X.2019.05.150

新型助凝剂海藻酸钠的助凝效能及作用机制研究

doi: 10.12153/j.issn.1674-991X.2019.05.150

江苏师范大学化学与材料科学学院,江苏徐州 221000

详细信息

作者简介:
祝苑(1997—),女,主要从事新型水处理药剂的研究, 15252086702@163.com

通讯作者:
赵爽 E-mail: zhaoshuang5186@163.com

中图分类号: X703
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- 被引次数: 0
出版历程
- 收稿日期: 2019-04-16
- 刊出日期: 2019-11-20

Study on coagulation aid efficiency and mechanism of new coagulant sodium alginate

School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou 221000, China

More Information

Corresponding author: Shuang ZHAO E-mail: zhaoshuang5186@163.com

摘要

摘要: 将海藻酸钠(SA)作为助凝剂,与混凝剂聚合氯化铝(PAC)复配使用,在模拟地表水样的混凝处理中探究其助凝效能,并考察溶液pH对混凝效果的影响,同时通过混凝出水Zeta电位分析其助凝作用机理。结果表明:对模拟地表水样,PAC与SA复配使用时最佳投加量分别为4.00及0.06 mg/L,此时浊度和UV₂₅₄的去除率分别可达81.9%和78.7%;溶液pH对混凝效果的影响较大,在pH为7.00时SA的助凝效果最佳,此时浊度及UV₂₅₄的去除率分别可达84.0%和83.7%。与传统助凝剂聚丙烯酰胺(PAM)的对比研究表明,在各自最佳使用条件下,SA可以得到与PAM相当的助凝效果,且SA的投加量远低于PAM,具有较大的成本优势。
- 海藻酸钠 /
- 助凝剂 /
- 混凝效能 /
- pH /
- 作用机制
Abstract: Sodium alginate (SA) was used as coagulant aid, combined with the coagulant of polyaluminium chloride (PAC), to explore its coagulation aid efficiency in the coagulation treatment of simulated surface water samples, and the effect of solution pH on coagulation efficiency investigated. Also its coagulation aid mechanism was analyzed by the measurement of Zeta potential of the coagulation effluent. Results showed that the optimal dosage of PAC and SA was 4.00 mg/L and 0.06 mg/L for simulated surface water samples. Under this condition, turbidity and UV₂₅₄ removal rates reached 81.9% and 78.7%, respectively. Coagulation efficiency was influenced dramatically by solution pH, and coagulation aid effect of SA was best when pH was 7.00. In this condition, turbidity and UV₂₅₄ removal rate could reach 84.0% and 83.7%, respectively. Additionally, comparative study results showed that coagulation aid efficiency of SA was equal to that of traditional coagulant aid PAM under the optimal conditions. However, SA dosage was much lower than that of PAM, which was a great cost advantage in water treatment.
- sodium alginate /
- coagulant aid /
- coagulation efficiency /
- pH /
- coagulation mechanism

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参考文献(21)

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