Abstract
Abstract In this study, standard jar tests were conducted using white mustard seed protein (WMSP) as a natural coagulant to remove direct black 19 (DB-19) from its aqueous solution. Comparative coagulation tests were performed using commercial polyaluminum chloride (PAC). The results showed that DB-19 removal by WMSP increased with increasing settling time and reached the maximum removal at 180 min. The DB-19 removal descended from 98.4 to 46.2% as pH increased from 4 to 10. The most effective temperature for DB-19 removal was 25 °C. The removal of DB-19 was weakened by the presence of Na2S2O4. Overall, WMSP was more efficient than PAC for DB-19 removal in all experiments except at pH 4 and 5. The mechanism of the removal of DB-19 by WMSP could be attributed to adsorption and charge neutralization processes.
Highlights
Jingxi Tie Zhihong Zheng Guoting Li NanNan Geng Ganfang Chang Lu Yu Yifan Ji Ling Shi Yangyang Chang Leilei Hu School of Municipal and EnvironmentalEngineering, North China University of Water Resources and Jingxi Tie Henan Engineering Research Center of WaterPollution and Soil Damage Remediation, Zhengzhou, 450011, China and Henan Key Laboratory of Water EnvironmentSimulation and Treatment, Zhengzhou, 450002, ChinaZhihong Zheng Henan Vocational College of Water Conservancy and Environment, Zhengzhou, 450008, China and Henan Engineering Laboratory of Lake & ReservoirEcological Protection and Reclamation, Zhengzhou, 450008, ChinaGlobally, the textile industry is one of the largest fresh water consumers which generates large amounts of wastewater
It can be seen that the direct black 19 (DB-19) removals decreased from 98.4 to 46.2% and 99.0 to 41.1% as the pH increased from 4 to 10 for white mustard seed protein (WMSP) and polyaluminum chloride (PAC), respectively
The performance of WMSP was comparable to PAC, except at pH 4 and 5, WMSP was still very efficient for DB-19 removal
Summary
Jingxi Tie Zhihong Zheng (corresponding author) Guoting Li NanNan Geng Ganfang Chang Lu Yu Yifan Ji Ling Shi Yangyang Chang Leilei Hu School of Municipal and EnvironmentalEngineering, North China University of Water Resources and Jingxi Tie Henan Engineering Research Center of WaterPollution and Soil Damage Remediation, Zhengzhou, 450011, China and Henan Key Laboratory of Water EnvironmentSimulation and Treatment, Zhengzhou, 450002, ChinaZhihong Zheng Henan Vocational College of Water Conservancy and Environment, Zhengzhou, 450008, China and Henan Engineering Laboratory of Lake & ReservoirEcological Protection and Reclamation, Zhengzhou, 450008, ChinaGlobally, the textile industry is one of the largest fresh water consumers which generates large amounts of wastewater. Pollution and Soil Damage Remediation, Zhengzhou, 450011, China and Henan Key Laboratory of Water Environment. Zhihong Zheng Henan Vocational College of Water Conservancy and Environment, Zhengzhou, 450008, China and Henan Engineering Laboratory of Lake & Reservoir. The textile industry is one of the largest fresh water consumers which generates large amounts of wastewater. According to the data of the China statistical yearbook on the environment, the textile industry. It is of great importance to remove the dyes from wastewater
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