Response surface methodology–based optimisation of adsorption of diclofenac and treatment of pharmaceutical effluent using combined coagulation-adsorption onto nFe2O3 decorated water chestnut shells biochar

被引:3
作者
Bano, Amreen [1 ]
Aziz, Mohd Kashif [2 ]
Mishra, Rahul [3 ]
Dave, Hemen [4 ]
Prasad, Bablu [5 ]
Kumari, Madhu [6 ]
Dubey, Darpan [7 ]
Meili, Lucas [8 ]
Shah, Maulin P. [9 ]
Prasad, Kumar Suranjit [1 ]
机构
[1] Centre of Environmental Studies, Institute of Inter-Disciplinary Studies, University of Allahabad, Uttar Pradesh, Prayagraj
[2] Department of Chemistry, Faculty of Science, University of Allahabad, Uttar Pradesh, Prayagraj
[3] Department of Electronics and Communication, Faculty of Science, University of Allahabad, Uttar Pradesh, Prayagraj
[4] National Forensic Sciences University, Gujarat, Gandhinagar
[5] Department of Environmental Studies, Faculty of Science, The Maharaja Sayajirao University of Baroda, Vadodara
[6] Department of Botany, B. R. A. Bihar University, Bihar, Muzaffarpur
[7] Department of Physics, Faculty of Science, University of Allahabad, Uttar Pradesh, Prayagraj
[8] Laboratory of Processes - LAPRO, Technology Center of Federal, University of Alagoas, Av. Lourival de Melo Mota, s/n, Campus A. C. Simoes, Tabuleiro dos Martins, AL, Maceio
[9] Environmental Microbiology Lab, Enviro Technology Limited (CETP), Gujarat, Ankleshwar
基金
英国科研创新办公室;
关键词
Adsorption; Biochar; Diclofenac; Response surface method; Water chestnut;
D O I
10.1007/s11356-024-34799-1
中图分类号
学科分类号
摘要
This work involved the preparation of pristine and iron nanoparticle-loaded biochar from a water chestnut shell to remove diclofenac sodium (DCF) containing effluent of pharmaceutical origin. To create suitable forecasting equations for the modelling of the DCF adsorption onto the adsorbent, response surface methodology (RSM) was used. The parameters, e.g. pH, adsorbent mass, DCF concentration and contact time, were used for the modeling of adsorption. The RSM model predicts that for 98.0% DCF removal, the ideal conditions are pH 6, an adsorbent dose of 0.5 g L−1, and a contact time of 60 min with an initial adsorbate concentration of 25 mg L−1 at 303 K. The maximum capacity deduced from the Langmuir model was 75.9 mg g−1 for pristine water chestnut shell biochar (pWCBC) and 122.3 mg g−1 for magnetically modified nano-Fe2O3 biochar (mWCBC). Under equilibrium conditions, the Langmuir model was the best-suited model compared to the Temkin and Freundlich models. The adsorption data in this investigation efficiently fitted the pseudo-second-order model, emphasizing that chemisorption or ion exchange processes may be involved in the process. The WCBC demonstrated recyclability after 10 cycles of repeated adsorption and desorption of DCF. A combined coagulation adsorption process removed COD, NH3–N, NO3−, PO43−, and DCF by 92.50%, 86.41%, 77.57%, 84.54%, and 97.25%, respectively. This study therefore shows that coagulation followed by adsorption onto biochar can be a cost-effective substitute for conventional pharmaceutical wastewater treatment. Graphical Abstract: (Figure presented.) © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.
引用
收藏
页码:55317 / 55335
页数:18
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