A clean process for selective recovery of copper from industrial wastewater by extraction-precipitation with p-tert-octyl phenoxy acetic acid. (15th February 2022)

• Record Type: Journal Article
• Authors: Zhang, Hepeng; Chen, Jinqing; Ni, Shuainan; Bie, Chao; Zhi, Hailan; Sun, Xiaoqi
• Is Part Of: Journal of environmental management. Volume 304(2022)
• Publication Date: 2022-02-15
• Subjects: Extraction-precipitation -- Copper -- Wastewater -- Selective -- Recovery; Environmental policy -- Periodicals; Environmental management -- Periodicals; Environment -- Periodicals; Ecology -- Periodicals; 363.705
• DOI: 10.1016/j.jenvman.2021.114164
• Languages: English
• ISSNs: 0301-4797

Abstract

Abstract: A novel method for the selective removal and recovery of copper ion from copper-containing wastewater by extraction-precipitation with p-tert-octyl phenoxy acetic acid as a precipitant is presented. The morphology, thermal stability and solubility of POAA were synthesized and characterized. Then the application of POAA to precipitate copper from simulated copper-containing wastewater was studied. The effects of some factors (i.e., time, pH, temperature, dosage of precipitant) on copper precipitation efficiency (P%) and water solubility of POAA were discussed. The extraction-precipitation mechanism of POAA and Cu 2+ was investigated by slope analysis combined with SEM, EDS, XPS and IR spectra. The concentration and purity of copper from industrial wastewater increased from 100.2 mg/L to 27, 916 mg/L and 13.71%–93.01% respectively, treating by the proposed extraction-precipitation. Moreover, POAA revealed good stability in the recycling processes. Extraction-precipitation strategy is simple, efficient and sustainable, which can effectively reduce the volume of sludge in the process of wastewater treatment and produce copper concentrated solution with industrial value, which has revealed application potential for the clean production of copper smelting enterprises. Graphical abstract: Image 1 Highlights: Copper containing wastewater was treated by extraction-precipitation method. The extraction-precipitation mechanism between POAA and Cu 2+ is cation exchange. The precipitate particle formed by POAA and Cu 2+ are larger. POAA can selectively precipitate and enrich Cu 2+ from industrial wastewater. POAA can be regenerated and recycled.