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高聚硫酸铝氯化物混凝剂及其去除腐殖酸的混凝性能

High-poly-aluminum chloride sulfate coagulants and their coagulation performances for removal of humic acid.

作者信息

Wu Zhen, Zhang Xian, Pang Jinglin, Li Juan, Li Jiding, Zhang Panyue

机构信息

Department of Chemical Engineering, Ordos Institute of Technology Ordos 017000 China

Department of Water Resources & Environmental Treatment, Redbud Innovation Institute Ordos 017000 China.

出版信息

RSC Adv. 2020 Feb 18;10(12):7155-7162. doi: 10.1039/c9ra10189f. eCollection 2020 Feb 13.

DOI:10.1039/c9ra10189f
PMID:35493884
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9049776/
Abstract

High-poly-aluminum chloride sulfate (HPACS) coagulants with different [SO ]/[Al] molar ratio () were prepared and proved to have high coagulation efficiency for the removal of humic acid and strong stability for storage and application. The results showed that the higher the SO addition, the bigger the aluminum polymerization particles and the more the polymerization Al existed in the prepared HPACS coagulants. The HPACS exhibited higher coagulation efficiency, a better aging stability and stronger resistance to the change of pH and Ca concentration of raw water than the polyaluminum chloride (PAC) and poly-aluminum chloride sulfate (PACS) reported before. The Sips adsorption neutralization model was established to illustrate the relationship between coagulant dosage and zeta potential of the water system. The adsorption neutralization capacity was proved to be HPACS ( = 0) > HPACS ( = 0.02) > HPACS ( = 0.06) > HPACS ( = 0.10), which was not completely consistent with the coagulation effect of HPACS with different values and indicated that in addition to adsorption neutralization, actions like bridge-aggregation, precipitation, and sweep-flocculation also played an important role during HPACS coagulation. Moreover, the negative Gibbs free energy indicated that the coagulant adsorption neutralization reaction was a spontaneous process.

摘要

制备了具有不同[SO₄²⁻]/[Al³⁺]摩尔比（β）的高聚硫酸铝氯化物（HPACS）混凝剂，结果表明其对腐殖酸的去除具有很高的混凝效率，且在储存和应用中具有很强的稳定性。结果显示，SO₄²⁻添加量越高，制备的HPACS混凝剂中铝聚合颗粒越大，聚合态铝的含量越多。与之前报道的聚合氯化铝（PAC）和聚硫酸氯化铝（PACS）相比，HPACS表现出更高的混凝效率、更好的老化稳定性以及更强的抗原水pH值和Ca²⁺浓度变化的能力。建立了Sips吸附中和模型以说明混凝剂投加量与水体系ζ电位之间的关系。结果证明吸附中和能力为HPACS（β = 0）> HPACS（β = 0.02）> HPACS（β = 0.06）> HPACS（β = 0.10），这与不同β值的HPACS的混凝效果并不完全一致，表明在HPACS混凝过程中，除吸附中和作用外，架桥絮凝、沉淀和卷扫絮凝等作用也发挥了重要作用。此外，负的吉布斯自由能表明混凝剂吸附中和反应是一个自发过程。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1143/9049776/216a9d7b6172/c9ra10189f-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1143/9049776/771ed2c6fd60/c9ra10189f-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1143/9049776/6e2904485a9e/c9ra10189f-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1143/9049776/3a6bd33791c2/c9ra10189f-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1143/9049776/e72ebb8807f1/c9ra10189f-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1143/9049776/330506d9c7de/c9ra10189f-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1143/9049776/5869d5b32785/c9ra10189f-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1143/9049776/cf277868eb24/c9ra10189f-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1143/9049776/7fff0fa978f2/c9ra10189f-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1143/9049776/216a9d7b6172/c9ra10189f-f9.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1143/9049776/771ed2c6fd60/c9ra10189f-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1143/9049776/6e2904485a9e/c9ra10189f-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1143/9049776/3a6bd33791c2/c9ra10189f-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1143/9049776/e72ebb8807f1/c9ra10189f-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1143/9049776/330506d9c7de/c9ra10189f-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1143/9049776/5869d5b32785/c9ra10189f-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1143/9049776/cf277868eb24/c9ra10189f-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1143/9049776/7fff0fa978f2/c9ra10189f-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/1143/9049776/216a9d7b6172/c9ra10189f-f9.jpg

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