Sustainable removal of copper from wastewater using chemically treated bio-sorbent: Characterization, mechanism and process kinetics
Document Type
Journal Article
Publication Title
Environmental Technology & Innovation
Volume
23
Publisher
Elsevier
School
School of Engineering
RAS ID
39659
Abstract
This study introduces the impact of treating chicken drumstick bones on the removal of copper ions from an aqueous solution. An untreated bio-sorbent (UTB), base treated bio-sorbent (BTB), acid-treated bio-sorbent (ATB), and detergent treated bio-sorbent (DTB) chicken bones were assessed as potential Cu (II) bio-sorbents (Bio-S). The treatment efficiency was judged on the Cu (II) percentage removal efficiency (%Removal) and the adsorption capacity (qm). The Bio-S were characterized using FTIR and SEM. The changes exhibited in the surface functional groups corresponded to the improvement in %Removal and qm. Isotherms (including, Langmuir, Freundlich and Dubinin–Radushkevich [D–R]) and kinetic models (including pseudo-first-order kinetics, pseudo-second-order kinetics, the Elovich equation, and the intra-particle diffusion model) were used to model and predict the adsorption process. The results indicated that the DTB achieved %Removal of 100% and a qm of 28 mg g−1 in comparison to 73% and 19 mg g−1 for the UTB. The BTB demonstrated comparable results to the DTB with a qm of 25 mg g−1 and % Removal of 100%. However, the ATB exhibited a significantly lower qm of 8 mg g−1 and %Removal of 5%. The pseudo-second-order model provided the best representation of the adsorption kinetic data. This suggests that the sorbent is connected to the adsorbent by two or more steps, including intra-particle diffusion. The characterization tests indicated that the BTB and DTB underwent changes in the surface functional groups, increased the surface porosity, and enhanced the %Removal of Cu (II). The significant removal efficiency of the DBT has shown some promising results as a sustainable bio-sorbent for the removal of heavy metals (HMs) from aqueous solutions.
DOI
10.1016/j.eti.2021.101555
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Comments
Al Ketife, A. M. D., Almomani, F., & Znad, H. (2021). Sustainable removal of copper from wastewater using chemically treated bio-sorbent: Characterization, mechanism and process kinetics. Environmental Technology & Innovation, 23, article 101555. https://doi.org/10.1016/j.eti.2021.101555