TY - JOUR
T1 - Remediation of lignin and its derivatives from pulp and paper industry wastewater by the combination of chemical precipitation and ozonation
AU - De los Santos Ramos, W.
AU - Poznyak, T.
AU - Chairez, I.
AU - Córdova R., I.
N1 - Funding Information:
The authors thank the Department of Graduate Study and Investigation of the National Polytechnic Institute of Mexico (Project #20070444) and the National Counsel of Science and Technology of Mexico-CONACyT (Project #49367) for the supporting of this investigation. Additionally, Department of Biotechnology and Bioengineering of CINVESTAV-IPN, particularly, to Dr. Refugio Rodríguez-Vázquez for providing the wastewater samples.
PY - 2009/9/30
Y1 - 2009/9/30
N2 - 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.
AB - 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.
KW - Biodegradability
KW - Chemical precipitation
KW - Lignin remediation
KW - Ozonation
UR - http://www.scopus.com/inward/record.url?scp=67649816844&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2009.03.152
DO - 10.1016/j.jhazmat.2009.03.152
M3 - Artículo
C2 - 19464112
SN - 0304-3894
VL - 169
SP - 428
EP - 434
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
IS - 1-3
ER -