- Title
- TiO2/CTS/ATP adsorbent modification and its application in adsorption-ultrafiltration process for dye wastewater purification
- Creator
- Wang, Zhihong; Wu, Zekun; Zhi, Xujun; Tu, Tianfu; Nie, Jinxu; Du, Xing; Luo, Yunlong
- Relation
- Environmental Science and Pollution Research Vol. 28, Issue 42, p. 59963-59973
- Publisher Link
- http://dx.doi.org/10.1007/s11356-021-13933-3
- Publisher
- Springer
- Resource Type
- journal article
- Date
- 2021
- Description
- Industrial dyeing produces highly polluting wastewater and threatens the environment. Effective treatment of dyeing wastewater is a crucial step to prevent toxic chemicals from entering receiving waters. This study aimed to assess a modified attapulgite (ATP)-based adsorbent for dyeing wastewater purification by introducing chitosan (CTS) and titanium dioxide (TiO2) into the adsorbent material named TiO2/CTS/ATP. It was found that after modification, the adsorbent showed a lower hydrophilicity, as demonstrated by an increase in the water contact angle from 9.1° to 42°, which could reduce the water adsorption tendency and potentially facilitate contaminants adherence. The modification also led to a significantly increased specific surface area of 79.111 m2/g from 3.791 m2/g and exhibited more uniform and smaller particle size (reduced from 3.99 to 2.52 μm). When the TiO2/CTS/ATP adsorbent was applied to the adsorption of Congo red solution, the adsorption efficiency was observed to reach to 97.6% at the dosage of 0.5 g/L. Furthermore, the combination of adsorption and ultrafiltration was able to achieve 99% Congo red removal. Adsorption pretreatment prior to the ultrafiltration also enabled to reduce membrane fouling, increased the reversible membrane fouling, and resulted in a considerably lower transmembrane pressure as compared with the direct ultrafiltration filtration system.
- Subject
- TiO2/CTS/ATP adsorbent; ultrafiltration; membrane fouling; dyeing wastewater; modified attapulgite; SDG 6; SDG 9; SDG 17; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1479592
- Identifier
- uon:50334
- Identifier
- ISSN:0944-1344
- Language
- eng
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