Influence of surface modifier on the characteristics of microbubbles in dissolved air flotation

doi:10.11894/iwt.2020-0593

Industrial Water Treatment ›› 2021, Vol. 41 ›› Issue (4): 71-76. doi: 10.11894/iwt.2020-0593

• Research And Experiment • Previous Articles Next Articles

Influence of surface modifier on the characteristics of microbubbles in dissolved air flotation

Yao Qin¹(),Luming Ding²,Liping Tian³,Wei Liu¹,Rupeng Liu^1,*(),Yonglei Wang¹

1. School of Municipal and Environmental Engineering, Shandong Jianzhu University, Ji'nan 250100, China
2. College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Taian 271018, China
3. Weifang Municipal Public Utilities Service Center, Weifang 261041, China

Received:2021-03-09 Online:2021-04-20 Published:2021-04-23
Contact: Rupeng Liu E-mail:2521931435@qq.com;13904@sdjzu.edu.cn

表面改性剂对溶气气浮微气泡特性影响研究

秦尧¹(),丁路明²,田立平³,刘威¹,刘汝鹏^1,*(),王永磊¹

1. 山东建筑大学市政与环境工程学院, 山东济南 250100
2. 山东农业大学水利土木工程学院, 山东泰安 271018
3. 潍坊市市政公用事业服务中心, 山东潍坊 261041

通讯作者: 刘汝鹏 E-mail:2521931435@qq.com;13904@sdjzu.edu.cn
作者简介:秦尧(1995-), 硕士。E-mail: 2521931435@qq.com
基金资助:
潍坊市科技发展计划项目(2019ZJ1088)

Abstract

Abstract:

The effects of three surface modifier CTAB, chitosan and PDADMAC on the characteristics of microbubbles in dissolved air flotation were studied. The results showed that the decrease of the average diameter of microbubbles was mainly due to the large increase of the number of small size microbubbles. The change of CTAB concentration could significantly influence the diameter and coalescence probability of microbubbles, slightly affected the rising speed of microbubbles. The addition of cationic polymer could increase the coalescence phenomenon between microbubbles, slightly affect the diameter and rising speed of microbubbles. Among three modifiers, CTAB had the largest adhesion efficiency on the surface of microbubbles, while PDADMAC was the smallest. The charge amount of different modifiers and their adsorption efficiency on the surface of microbubbles were quite different.

Key words: surface modifier, dissolved air flotation, microbubble

摘要：

研究了十六烷基三甲基溴化铵（CTAB）、壳聚糖、聚二甲基二烯丙基氯化铵（PDADMAC）3种表面改性剂对溶气气浮微气泡特性的影响。结果表明：微气泡平均直径减小主要得益于小尺寸微气泡数量的大幅增加。CTAB投加浓度能显著影响微气泡的直径及并聚概率，对微气泡上升速度有略微影响。投加阳离子聚合物可使微气泡间的并聚现象增多，对微气泡直径及上升速度影响微弱。3种改性剂在微气泡表面的附着效率以CTAB最大，PDADMAC最小。不同改性剂分子产生的电荷量及其在微气泡表面的吸附效率有较大差异。

关键词: 表面改性剂, 溶气气浮, 微气泡

CLC Number:

X703
TU991.2

Yao Qin,Luming Ding,Liping Tian,Wei Liu,Rupeng Liu,Yonglei Wang. Influence of surface modifier on the characteristics of microbubbles in dissolved air flotation[J]. Industrial Water Treatment, 2021, 41(4): 71-76.

秦尧,丁路明,田立平,刘威,刘汝鹏,王永磊. 表面改性剂对溶气气浮微气泡特性影响研究[J]. 工业水处理, 2021, 41(4): 71-76.

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Figures/Tables 7

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项目	无改性剂	CTAB改性	PDADMAC改性	CTS改性
微气泡平均Zeta电位/mV	-48~-31	40±5	38±9	20±10
改性剂电荷密度/（meq·g-1）	—	2.6~3.3	5.7~6.3	1.3~1.7

项目	无改性剂	CTAB改性	PDADMAC改性	CTS改性
微气泡平均Zeta电位/mV	-48~-31	40±5	38±9	20±10
改性剂电荷密度/（meq·g-1）	—	2.6~3.3	5.7~6.3	1.3~1.7

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