Leather Science and Engineering ›› 2019, Vol. 29 ›› Issue (04): 24-29.doi: 10.19677/j.issn.1004-7964.2019.04.005

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Adsorption of Dissolved Organic Matter in Biochemical Tail Water by Fe(III)-Al2O3

WANG Qing,MA Hongrui(),HAO Yongyong,ZHU Chao   

  1. School of Environmental Science and Engineering,Shaanxi university of science & technology, Xi'an 710021,China
  • Received:2019-03-28 Published:2019-08-28 Online:2019-09-09
  • Contact: MA Hongrui E-mail:mahrxingfeng@163.com

Abstract:

The removal efficiency of dissolved organic matter (DOM) in secondary effluent by Al2O3 and Fe(III)-Al2O3 was compared, and the SEM and XRD were used to analyse the changes in structure and composition of Al2O3 and Fe(III)-Al2O3. While the UV parameters and three-dimensional fluorescence spectroscopy were used to characterize the changes of DOM. The results showed that the removal efficiency of Al2O3 was improved remarkably after modification. When the sintering temperature was 150 ℃ and the dosage of Fe(III)-Al2O3 was 30 g, the removal rate of chroma was 93.8%. While the removal rate of dissolved organic carbon (DOC) was 38.7%. Fe(III)-Al2O3 had many pore structures and loaded with iron hydrous oxides on the surface, which had stronger adsorption capacity for aromatic compounds with high molecular weight and oxygen-containing functional groups. It selectively adsorbed humic-like and fulvic-like substances, which could provide a targeted advanced treatment technology for secondary effluent in tannery wastewater combined with advanced oxidation processes.

Key words: Fe(III)-Al2O3, tannery wastewater, secondary effluent, dissolved organic matter

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