Synthesis and application of polymerized Al-Ti based flocculant

被引：0

作者：

Pan N. ^{[1
]}

Tian C. ^{[2
]}

Huai L. ^{[1
]}

Liu Y. ^{[1
]}

Zhang F. ^{[1
]}

Gao X. ^{[1
]}

Liu W. ^{[1
]}

Yan L. ^{[1
]}

Zhao Y. ^{[1
]}

机构：

[1] College of Water Conservancy and Environment, Jinan University, Shandong, Jinan

[2] College of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Shandong, Jinan

来源：

Huagong Xuebao/CIESC Journal | 2024年 / 75卷 / 03期

关键词：

coagulate; electrochemistry; polyaluminum titanium-based flocculant; polymerization; water treatment;

D O I：

10.11949/0438-1157.20231209

中图分类号：

学科分类号：

摘要：

Polyaluminum titanium based flocculant is a new type of composite polymer flocculant, its effect is better than that of aluminum salt flocculant and titanium salt coagulant. The preparation method of composite flocculants has always been slow dropping alkali method, and electrodialysis method is a new preparation method. Electrodialysis can precisely regulate the hydrolysis polymerization of Al3+ and Ti4+ with OH- microinterface process, so as to obtain hydroxyl polymers with flocculating effect. In order to further understand the preparation mechanism of flocculant and the differences between the two preparation methods. First, the hydrolytic morphology distribution and physicochemical properties of the two flocculants were compared by Ferron time by time complexation colorimetry, FTIR, SEM and Zeta potential. It was found that the medium and high polymer content of E-PATC prepared by electrodialysis method was 3.89% higher than that of S-PATC prepared by slow dropping alkali method, and the Zeta potential was 8.9 mV higher, which indicated that the electric neutralization and sweeping capacity of E-PATC were better than that of S-PATC. Second, the flocculation effect of two kinds of flocculants on Jiazi Lake water and secondary effluent was compared. It was found that the organic removal rate of E-PATC was higher than that of S-PATC in both Jiazi Lake water and secondary effluent. Finally, the floc dynamics of E-PATC was studied. E-PATC had a fast growth rate, a large floc particle size, and was easy to settle. In summary, the flocculation effects of E-PATC and S-PATC are similar, but the floc produced by E-PATC flocculation has a large particle size, is not easily broken, and has better settling properties. © 2024 Materials China. All rights reserved.

引用

页码：1009 / 1018

页数：9

共 30 条

[1] Du G C, Li Z C, Zhang J B, Et al., Chlorination behaviors for green and efficient vanadium recovery from tailing of refining crude titanium tetrachloride, Journal of Hazardous Materials, 420, (2021)
[2] Crozes G, White P, Marshall M., Enhanced coagulation: its effect on NOM removal and chemical costs[J], Journal AWWA, 87, 1, pp. 78-89, (1995)
[3] Zhang W J, Song R N, Cao B D, Et al., Variations of floc morphology and extracellular organic matters (EOM) in relation to floc filterability under algae flocculation harvesting using polymeric titanium coagulants (PTCs), Bioresource Technology, 256, pp. 350-357, (2018)
[4] Liu B B, Gao B Y, Guo K Y, Et al., The interactions between Al (Ⅲ) and Ti (Ⅳ) in the composite coagulant polyaluminum-titanium chloride, Separation and Purification Technology, 282, (2022)
[5] Wang W Y, Yue Q Y, Li R H, Et al., Optimization of coagulation pre-treatment for alleviating ultrafiltration membrane fouling: the role of floc properties on Al species, Chemosphere, 200, pp. 86-92, (2018)
[6] Wang X M, Xu J R, Xu M, Et al., High-efficient removal of arsenite by coagulation with titanium xerogel coagulant, Separation and Purification Technology, 258, (2021)
[7] Gan Y H, Zhang L, Zhang S J., The suitability of titanium salts in coagulation removal of micropollutants and in alleviation of membrane fouling, Water Research, 205, (2021)
[8] Zhao Y X, Li X Y, Tian C, Et al., Production of carbon-doped titanium dioxide (C – TiO<sub>2</sub>) from polytitanium-coagulated sludge as an adsorbent or photocatalyst for pollutant removals, Journal of Cleaner Production, 267, (2020)
[9] Zhang N, Yang Y, Fan L J, Et al., Coagulation effect of polyaluminum-titanium chloride coagulant and the effect of floc aging in fluoride removal: a mechanism analysis, Separation and Purification Technology, 325, (2023)
[10] Zhao Y X, Chi Y T, Tian C, Et al., Recycling of titanium-coagulated algae-rich sludge for enhanced photocatalytic oxidation of phenolic contaminants through oxygen vacancy, Water Research, 177, (2020)

← 1 2 3 →