期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 652, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.colsurfa.2022.129719
关键词
Polyacrylonitrile; Phosphate adsorption; Phosphate recovery; Amination; Wastewater treatment
资金
- Research Program for In-depth Treatment Technology Upgradation of the Wuxi Urban Sewage Treatment Plant [N20191003]
- Pre-research Fund of Jiangsu Collaborative Innovation Center of Technology and Material of Water Treatment [XTCXSZ2020-2]
- China Postdoctoral Science Foundation [2021M691272]
- Jiangsu Postdoctoral Science Foundation [2021K056A]
- Foundation Research Project of Jiangsu Province [BK20210484]
- Fundamental Research Funds for the Central Universities [JUSRP121053]
In this study, an inexpensive fiber material was developed for the removal and recovery of phosphate from wastewater. The material showed excellent adsorption performance and anti-interference ability, leading to successful phosphate removal in real wastewater treatment.
The current eutrophication from excess phosphorus (P) discharge and the potential shortage crisis from explosive P demand, have attracted extensive attention from researchers. To solve this dilemma, adsorption technology is a promising method to simultaneously achieve phosphate removal and recovery. However, the difficulty in separation and high cost of adsorbents limit their application in wastewater treatment. Thus, an inexpensive Zn (OH)(2)@DETA-aminated polyacrylonitrile (PAN) fibre was prepared to remove and recover phosphate from wastewater. The maximum adsorption capacity reached 108.0 +/- 2.8 mg/g with the adsorption equilibrium time of 20 min. The inner sphere complex forming the Zn-O-P bond was confirmed to be the dominant force, resulting in over 70% anti-interference performance even at a coexisting molar ratio of NO3-, Cl-, SO42-, CO3-2, and humic acid (HA) to phosphate of 100:1. Using the Zn(OH)(2)@DETA-aminated PAN filter column to continuously treat real wastewater, the effluent of phosphate concentration below 0.1 mg/L was obtained with approximately 100% of P-removal. In addition, phosphate in the desorption solution was recovered as P-rich Zn-2(PO4)(OH) products. In brief, this study recommends Zn(OH)(2)@DETA-aminated PAN as a phosphate adsorbent, along with positive prospects for P recovery.
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