Remediation of lignin and its derivatives from pulp and paper industry wastewater by the combination of chemical precipitation and ozonation

被引:54
作者
De los Santos Ramos, W. [1 ]
Poznyak, T. [1 ]
Chairez, I. [2 ]
Cordova R, I. [1 ]
机构
[1] IPN, ESIQIE, Super Sch Chem Engn, Natl Polytech Inst Mexico, Mexico City 07738, DF, Mexico
[2] IPN, UPIBI, Profess Interdisciplinary Unit Biotechnol, Mexico City 07480, DF, Mexico
关键词
Lignin remediation; Chemical precipitation; Ozonation; Biodegradability; ADVANCED OXIDATION PROCESSES; MILL CIRCULATION WATERS; RESIN ACIDS; WET OXIDATION; THERMOMECHANICAL PULP; BIOLOGICAL TREATMENT; EFFLUENT TREATMENT; DEGRADATION; OZONE; COAGULATION;
D O I
10.1016/j.jhazmat.2009.03.152
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In the present work the degradation of the lignin and its derivatives in the residual water of a paper industry by simple ozonation was investigated. The remediation of lignin was realized using the combination of the pre-treatment with chemical precipitation, using concentrated sulfuric acid (97.1%) at the pH 1 and 3, and of the simple ozonation of the filtered residual water at the pH 1. 3, 8 and 12. Since the high residues content (the initial chemical oxygen demand (COD) is 70,000 mg/L) in the experiments the diluted samples (1:10) were used. The previous precipitation has showed a significant effect on the reduction of the COD (77%) and color (96.1%). The sludge precipitated contents sulfolignin, which in the reaction with sulfuric acid was formed. In ozonation of the filtered residual water during 25 min at the pH 1, 3. 8 and 12 the follows by-products were formed: fumaric, maleic, malonic and formic acids. The biodegradability of the treated water in ozonation increases up 0.067-0.29. The effect of the precipitation and the ozonation conditions on the decolorization kinetics was evaluated. (C) 2009 Elsevier B.V. All rights reserved.
引用
收藏
页码:428 / 434
页数:7
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