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Article

Efficient Removal of Organic Matter from Biotreated Coking Wastewater by Coagulation Combined with Sludge-Based Activated Carbon Adsorption

School of Chemical and Environmental Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China
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Academic Editor: Alessandro Erto
Water 2022, 14(15), 2446; https://doi.org/10.3390/w14152446
Received: 7 July 2022 / Revised: 3 August 2022 / Accepted: 4 August 2022 / Published: 7 August 2022
(This article belongs to the Section Wastewater Treatment and Reuse)
Coagulation–adsorption can be effective in the removal of the organic matters remaining in biotreated coking wastewater (BTCW), and cheap and efficient adsorbents benefit the widespread application of this technology. In this study, a sludge-based activated carbon (SAC) was prepared using zinc chloride to activate sludge pyrolysis carbon for the treatment of BTCW with coagulation as the pretreatment process. According to Brunauer-Emmett-Teller (BET) and the scanning electron microscope (SEM) analysis, the SAC exhibited a specific surface area of 710.175 m2/g and well-developed pore structure. The removal characteristics of the organic matter in BTCW were systematically studied. The results show that 76.79% of the COD in the BTCW was removed by coagulation combined with SAC adsorption, and the effluent COD was below the discharge limit (80 mg/L) (GB16171-2012), with the optimal dosages of polyaluminum chloride and SAC being 150 mg/L and 4 g/L, respectively. Compared with a commercial powdered activated carbon (PAC) (48.26%), the SAC achieved a similar COD removal efficiency (47.74%) at a higher adsorption speed. The removal efficiencies of the hydrophobic components (77.27%) and fluorescent components by SAC adsorption were higher than those by PAC adsorption. The SAC also had an excellent removal effect on complex organic compounds and colored substances in the BTCW, as revealed by UV-vis spectra analyses. View Full-Text
Keywords: sludge-based activated carbon; biotreated coking wastewater; coagulation; adsorption; organic pollutants sludge-based activated carbon; biotreated coking wastewater; coagulation; adsorption; organic pollutants
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MDPI and ACS Style

Xia, Y.; Li, W.; He, X.; Liu, D.; Sun, Y.; Chang, J.; Liu, J. Efficient Removal of Organic Matter from Biotreated Coking Wastewater by Coagulation Combined with Sludge-Based Activated Carbon Adsorption. Water 2022, 14, 2446. https://doi.org/10.3390/w14152446

AMA Style

Xia Y, Li W, He X, Liu D, Sun Y, Chang J, Liu J. Efficient Removal of Organic Matter from Biotreated Coking Wastewater by Coagulation Combined with Sludge-Based Activated Carbon Adsorption. Water. 2022; 14(15):2446. https://doi.org/10.3390/w14152446

Chicago/Turabian Style

Xia, Yu, Weijia Li, Xuwen He, Dannuo Liu, Yichen Sun, Jie Chang, and Jing Liu. 2022. "Efficient Removal of Organic Matter from Biotreated Coking Wastewater by Coagulation Combined with Sludge-Based Activated Carbon Adsorption" Water 14, no. 15: 2446. https://doi.org/10.3390/w14152446

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