ZNO-CATALYZED PHOTODEGRADATION OF KRAFT BLACK LIQUOR

被引：43
|
作者：
MANSILLA, HD
VILLASENOR, J
MATURANA, G
BAEZA, J
FREER, J
DURAN, N
机构：
[1] UNIV CONCEPCION, DEPT CHEM, CHEM RENEWABLE RESOURCES LAB, CONCEPCION, CHILE
[2] UNIV ESTADUAL CAMPINAS, INST CHEM, BIOL CHEM LAB, BR-13081970 CAMPINAS, SP, BRAZIL
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 1994年 / 78卷 / 03期
关键词：
D O I：
10.1016/1010-6030(93)03731-U
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Kraft black liquor was used as a model for effluent from the pulp and paper industry. Photochemical bleaching was attained when dilute samples were photolyzed with UV radiation using ZnO as catalyst. The photochemical mineralization of organic matter was first order and dependent on the oxygen pressure. A catalyst doped with Ag showed little effect on the discoloration or decrease in the chemical oxygen demand (COD) of black liquor. Platinum-impregnated ZnO yielded 100% discoloration after 60 min (190 kJ m-2) of UV radiation. Gel chromatography profiles and CO2 evolution measurements confirm the photomineralization of organic matter.
引用
收藏
页码：267 / 273
页数：7
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