基于Zeta电位的HgS诱晶载体的选择方法研究

doi:10.19965/j.cnki.iwt.2025-0319

摘要/Abstract

摘要：

诱晶载体的选择和优化一般通过对比目标物的去除效果，载体选择范围窄、过程耗时长、人力物力消耗大。为了提高诱晶载体选择和优化过程的工作效率，探讨以Zeta电位为指标进行诱晶载体选择的可行性。考察了相同体系中天然石英砂、精制石英砂、分析纯石英砂、石榴石、硫铁矿、白云石、长石、萤石等8种诱晶载体的Zeta电位、诱晶沉淀去除Hg²⁺的效果，分析了载体在Hg²⁺去除中的作用机理，探讨了载体的Zeta电位与诱晶沉淀去除Hg²⁺效果的相关性，以及基于Zeta电位的HgS诱晶载体选择方法。结果表明：载体诱导HgS结晶效果与载体表面性质有显著相关性，体系中载体表面Zeta电位越接近零电点，载体诱导HgS结晶效果越好，载体表面的Zeta电位能较好地解释不同载体诱导效果间的差异，可作为HgS诱晶载体选择的参考依据。

关键词: Zeta电位, 载体选择, 结晶, HgS

Abstract:

The selection and optimization of crystallization-inducing carriers are generally conducted by comparing the removal efficiency of target substances, which features a narrow selection range, time-consuming process, and high consumption of manpower and material resources. To improve the efficiency of selecting and optimizing crystallization-inducing carriers, this study explored the feasibility of using Zeta potential as an indicator for the selection of such carriers. The Zeta potential and Hg²⁺ removal efficiency via induced crystallization precipitation of 8 types of crystallization-inducing carriers (natural quartz sand, refined quartz sand, analytical grade quartz sand, garnet, pyrite, dolomite, feldspar, and fluorite) in the same system were investigated. The mechanism of carriers in Hg²⁺ removal was analyzed, along with the correlation between the Zeta potential of carriers and the Hg²⁺ removal efficiency via induced crystallization precipitation, as well as the selection method of HgS crystallization-inducing carriers based on Zeta potential. The results showed that the HgS crystallization-inducing effect of carriers was significantly correlated with their surface properties. In the system, the closer the Zeta potential of the carrier surface was to the isoelectric point, the better the HgS crystallization-inducing effect. The Zeta potential of the carrier surface could effectively explain the differences in the inducing effects of different carriers, and thus could be used as a reference basis for the selection of HgS crystallization-inducing carriers.

Key words: Zeta potential, carrier selection, crystallization, HgS

中图分类号:

X703

张航, 马丽荣, 余蕾. 基于Zeta电位的HgS诱晶载体的选择方法研究[J]. 工业水处理, 2026, 46(3): 151-157.

Hang ZHANG, Lirong MA, Lei YU. Selection method for HgS crystallization-inducing carriers based on Zeta potential[J]. Industrial Water Treatment, 2026, 46(3): 151-157.

https://www.iwt.cn/CN/Y2026/V46/I3/151

图/表 8

表1 最佳载体诱导效果实验条件

Table 1 Experimental conditions for the induction of the optimal carrier

因素	水平
pH	7、7.5、8、8.5、9
加药比/倍	2、4、6、8、10
反应时间/min	1、3、5、7、9，11、13、15、17、19、21、23、25、27、30

表2 最佳载体Zeta电位实验条件

Table 2 Experimental conditions for Zeta potential of the optimal carrier

因素	水平
pH	7、7.5、8、8.5、9
加药比/倍	2、4、6、8、10
时间/min	1、5、9、13、17、21、23、25、30、35、40、45

图1 载体对沉降法去除废水中Hg²⁺效果的影响

Fig.1 Effects of carriers on the removal of Hg²⁺ via sedimentation in wastewater treatment

图2 不同载体在HgS体系中的Zeta电位

Fig.2 Zeta potentials of different carriers in the HgS system

图3 不同载体对Hg²⁺的吸附效果

Fig.3 Adsorption effects of different carriers on Hg²⁺

图4 不同pH条件下水中残留Hg²⁺浓度及白云石表面Zeta电位

Fig.4 Residual Hg²⁺ concentration in water and Zeta potential of dolomite surface under different pH conditions

图5 不同加药比条件下水中残留Hg²⁺浓度及白云石表面Zeta电位

Fig.5 Residual Hg²⁺ concentration in water and Zeta potential of dolomite surface under different dosing ratio

图6 载体在不同水溶液中的Zeta电位

Fig.6 Zeta potentials of different carriers in different aqueous solutions

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