ORIGINAL RESEARCH
Performance of Tetracycline Hydrochloride Removal Using Acidized and Magnetized Waterworks Sludge as Adsorbent
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School of Environmental and Municipal Engineering, North China University of Water Resources and Electric Power, Zhengzhou, 450045, China
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School of Water Conservancy, North China University of Water Resources and Electric Power, Zhengzhou 450046, China
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School of water resource, North China University of Water Resources and Electric Power, Zhengzhou, 450045, China
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Henan Key Laboratory of Water Resources Conservation and Intensive Utilization in the Yellow River Basin, Zhengzhou, 450046, China
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Henan Vocational College of Water Conservancy and Environment, Zhengzhou, 450008, China
CORRESPONDING AUTHOR
Zhihong Zheng   

North China University of Water Resources and Electric Power, China
Submission date: 2022-06-01
Final revision date: 2022-07-06
Acceptance date: 2022-07-19
Online publication date: 2022-11-02
Publication date: 2022-12-08
 
Pol. J. Environ. Stud. 2022;31(6):5863–5873
 
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ABSTRACT
The current disposal of waterworks sludge (WS) by landfill or discharge into water body results in land consumption and environment pollution. To solve the problem, alum-based waterworks sludge (AWS) was reclaimed and reused to develop adsorbent for aqueous tetracycline hydrochloride (TCH) removal. WS was modified using HCl solution and Fe2+/Fe3+ coprecipitation to get acidized and magnetized waterworks sludge (Fe3O4@HAWS) for the improvement of its adsorption capacity and separation efficiency. Fe3O4@HAWS was used as adsorbent to test its static TC adsorption performance. The results suggested that the TCH adsorption was a pH dependent process, and the maximum TCH adsorption by Fe3O4@HAWS was achieved at pH 5 at 25ºC in the pH range of 3-10. Among the three kinetic models, the pseudo-second-order equation best characterized the adsorption process, while the Freundlich equation best described the adsorption process. The thermodynamic study indicated that the adsorption process was spontaneous and exothermic. The investigation demonstrated that the composite was successful for aqueous TCH adsorption and spent adsorbent separation, providing not only a unique notion for the sustainable and environmentally friendly treatment and disposal of WS, but also a novel solution for TCH-containing wastewater treatment.
eISSN:2083-5906
ISSN:1230-1485