Fe(III)-Al2O3对制革生化尾水中DOM的去除规律研究

doi:10.19677/j.issn.1004-7964.2019.04.005

皮革科学与工程 ›› 2019, Vol. 29 ›› Issue (04): 24-29.doi: 10.19677/j.issn.1004-7964.2019.04.005

Fe(III)-Al₂O₃对制革生化尾水中DOM的去除规律研究

王晴,马宏瑞(),郝永永,朱超

陕西科技大学环境科学与工程学院,陕西西安 710021

收稿日期:2019-03-28 出版日期:2019-08-28 上线日期:2019-09-09
通讯作者: 马宏瑞 E-mail:mahrxingfeng@163.com
作者简介:王晴（1995-）,女,在读硕士, 1193757151@qq.com。
基金资助:
国家水体污染控制与治理科技重大专项(2017ZX07602-001)

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

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

School of Environmental Science and Engineering,Shaanxi university of science & technology, Xi'an 710021,China

Received:2019-03-28 Online:2019-08-28 Published:2019-09-09
Contact: MA Hongrui E-mail:mahrxingfeng@163.com

摘要/Abstract

摘要：

比较了Al₂O₃和Fe(III)-Al₂O₃对制革生化尾水中难降解溶解性有机物(Dissolved organic matter, DOM)的去除效果,借助SEM和XRD分析了氧化铝改性前后结构组成的变化,并通过对紫外特征参数和三维荧光光谱的分析重点探讨了Fe(III)-Al₂O₃对制革生化尾水中DOM的去除规律。研究表明,Al₂O₃改性后吸附效果显著提高,烧结温度为150 ℃,Fe(III)-Al₂O₃用量为30 g时,色度去除率高达93.8 %,同时溶解性有机碳(Dissolved organic carbon, DOC)去除率可达38.7 %; Fe(III)-Al₂O₃具有的发达的孔隙结构及表面负载的无定型水合铁氧化物对分子量高、取代基为含氧官能团的芳香族化合物的吸附能力更强,且主要表现在选择性地吸附制革生化尾水中的类腐殖酸和类富里酸物质。利用Fe(III)-Al₂O₃的选择性吸附,可与高级氧化技术相结合,为制革废水生化尾水提供针对性更强的深度处理技术方案。

关键词: Fe(III)-Al₂O₃, 制革废水, 生化尾水, 溶解性有机物

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

中图分类号:

X794

王晴,马宏瑞,郝永永,朱超. Fe(III)-Al₂O₃对制革生化尾水中DOM的去除规律研究[J]. 皮革科学与工程, 2019, 29(04): 24-29.

WANG Qing,MA Hongrui,HAO Yongyong,ZHU Chao. Adsorption of Dissolved Organic Matter in Biochemical Tail Water by Fe(III)-Al₂O₃[J]. Leather Science and Engineering, 2019, 29(04): 24-29.

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参数	DOC/(mg/L)	UV₂₅₄	SUVA₂₅₄	E₂₅₃/E₂₀₃	E₂₅₄/E₃₆₅
0 h	73.80	2.04	2.76	0.06	7.54
1 h	55.28	1.47	2.66	0.056	8.22
2 h	42.66	0.91	2.13	0.038	8.96
4 h	39.12	0.53	1.35	0.024	10.01
8 h	32.07	0.14	0.44	0.007	6.57

Fe(III)-Al₂O₃对制革生化尾水中DOM的去除规律研究

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

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