Catalytic ozonation of quinoline using nano-MgO: Efficacy, pathways, mechanisms and its application to real biologically pretreated coal gasification wastewater

Coal gasiﬁcation wastewater (CGW) is a refractory and toxic wastewater. The secondary effluent quality usually cannot meet the discharge standards after conventional biological treatment processes. Heterogeneous catalytic ozonation is a promising technology for solving this problem. Two carbon materials were investigated as ozonation catalysts for the removal of the quinoline and COD in a real CGW secondary effluent. Results were indicated that CuOx /GAC presented a higher catalytic performance than granular activated carbon and single ozone, efficiency of removal of quinoline and COD were 69%, 92% respectively. Higher pH had positive effect on the degradation of quinoline due to the formation of hydroxyl radical (removal of quinoline rapidly reached above 90% in pH=10). The presence of the radical scavenger tert-butanol (TBA) evidenced the participation of hydroxyl radicals (•OH) in the oxidation mechanisms of quinoline. The stability of the catalysts was demonstrated by carrying repetitive experiments reusing catalysts sample.

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Advanced treatment of biologically pretreated coal gasification wastewater by a novel integration of heterogeneous catalytic ozonation and biological process

Bioresource Technology ◽

10.1016/j.biortech.2014.05.061 ◽

2014 ◽

Vol 166 ◽

pp. 592-595 ◽

Cited By ~ 35

Author(s):

Haifeng Zhuang ◽

Hongjun Han ◽

Shengyong Jia ◽

Baolin Hou ◽

Qian Zhao

Keyword(s):

Coal Gasification ◽

Biological Process ◽

Catalytic Ozonation ◽

Advanced Treatment ◽

Heterogeneous Catalytic ◽

Coal Gasification Wastewater

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Effect of Catalytic Ozonation Coupling with Activated Carbon Adsorption on Organic Compounds Removal Treating RO Concentrate from Coal Gasification Wastewater

Ozone Science and Engineering ◽

10.1080/01919512.2017.1416285 ◽

2018 ◽

Vol 40 (4) ◽

pp. 275-283 ◽

Cited By ~ 10

Author(s):

Fang Fang ◽

Hongjun Han

Keyword(s):

Activated Carbon ◽

Organic Compounds ◽

Coal Gasification ◽

Catalytic Ozonation ◽

Activated Carbon Adsorption ◽

Carbon Adsorption ◽

Coal Gasification Wastewater ◽

Ro Concentrate

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Removal of nitrogen from coal gasification wastewater by nitrosofication and denitrosofication

Water Science & Technology ◽

10.2166/wst.1998.0011 ◽

1998 ◽

Vol 38 (1) ◽

pp. 39-46 ◽

Cited By ~ 2

Author(s):

Junxin Liu ◽

Weiguang Li ◽

Xiuheng Wang ◽

Hongyuan Liu ◽

Baozhen Wang

Keyword(s):

Nitrogen Removal ◽

Coal Gasification ◽

Oxygen Demand ◽

Test Results ◽

New Process ◽

Scale Test ◽

Coal Gasification Wastewater ◽

Total Nitrogen Removal ◽

Biological Nitrogen ◽

Bench Scale Test

In this paper, a study of a new process with nitrosofication and denitrosofication for nitrogen removal from coal gasification wastewater is reported. In the process, fibrous carriers were packed in an anoxic tank and an aerobic tank for the attached growth of the denitrifying bacteria and Nitrobacter respectively, and the suspended growth activated sludge was used in an aerobic tank for the growth of Nitrosomonas. A bench scale test has been carried out on the process, and the test results showed that using the process, 25% of the oxygen demand and 40% of the carbon source demand can be saved, and the efficiency of total nitrogen removal can increase over 10% as compared with a traditional process for biological nitrogen removal.

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