Green metal oxides coated biochar nanocomposites preparation and its utilization in vertical flow constructed wetlands for reactive dye removal: Performance and kinetics studies.

Autor: Munir R; Department of Chemistry, University of Agriculture, Faisalabad 38000, Pakistan., Ali K; Department of Physics, University of Agriculture, Faisalabad 38000, Pakistan., Naqvi SAZ; University of Engineering and Technology Lahore, Lahore, Pakistan., Muneer A; Department of Physics, Government College Women University, Faisalabad 38000, Pakistan., Bashir MZ; University of Engineering and Technology Lahore, Lahore, Pakistan., Maqsood MA; Institute of Soil & Environmental Sciences, University of Agriculture, Faisalabad 38000, Pakistan., Noreen S; Department of Chemistry, University of Agriculture, Faisalabad 38000, Pakistan. Electronic address: saima.noreen@uaf.edu.pk.
Jazyk: angličtina
Zdroj: Journal of contaminant hydrology [J Contam Hydrol] 2023 May; Vol. 256, pp. 104167. Date of Electronic Publication: 2023 Mar 01.
DOI: 10.1016/j.jconhyd.2023.104167
Abstrakt: Major causes of water pollution in the ecosystem are pollutants such as dyes which are noxious. The present study was based on the synthesis of the green nano-biochar composites from cornstalk and green metal oxide resulting in Copper oxide/biochar, Zinc oxide /biochar, Magnesium oxide/biochar, Manganese oxide/biochar, biochar for removal of dyes combined with the constructed wetland (CW). Biochar Augmentation in constructed wetland systems has improved dye removal efficiency to 95% in order of copper oxide/biochar > Magnesium oxide/biochar > Zinc oxide/biochar > Manganese oxide/biochar > biochar > control (without biochar) respectively in wetlands. It has increased the efficiency of pH by maintaining pH 6.9-7.4, while Total Suspended Solids (TSS) removal efficiency and Dissolved oxygen (DO) increased with the hydraulic retention time of about 7 days for 10 weeks. Chemical oxygen demand (COD) and colour removal efficiency increased with the hydraulic retention time of 12 days for 2 months and there was a low removal efficiency for total dissolved solids (TDS) from control (10.11%) to Copper oxide /biochar (64.44%) and Electrical conductivity (EC) from control (8%) to Copper oxide /biochar (68%) with the hydraulic retention time of about 7 days for 10 weeks. Colour and chemical oxygen demand removal kinetics followed second and first-order kinetic. A significant growth in the plants were also observed. These results proposed the use of agricultural waste-based biochar as part of a constructed wetland substratum can provide enhanced removal of textile dyes. That can be reused.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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