Synthesis, characterization and As(III) scavenging behaviours of mango peel waste loaded with Zr(IV) ion from contaminated water.

Autor: Gyawali D; Central Department of Chemistry, Tribhuvan University, Kirtipur, Nepal.; Ministry of Forest and Environment, Department of Environment, Government of Nepal, Nepal., Poudel S; Central Department of Chemistry, Tribhuvan University, Kirtipur, Nepal., Poudel M; Central Department of Chemistry, Tribhuvan University, Kirtipur, Nepal., Ghimire KN; Central Department of Chemistry, Tribhuvan University, Kirtipur, Nepal., Pokhrel MR; Central Department of Chemistry, Tribhuvan University, Kirtipur, Nepal., Basnet P; Central Department of Chemistry, Tribhuvan University, Kirtipur, Nepal.; Nepal Engineering College, Pokhara University, Changunarayan, Bhaktapur, Nepal., Bahadur Bk K; Central Department of Chemistry, Tribhuvan University, Kirtipur, Nepal., Paudyal H; Central Department of Chemistry, Tribhuvan University, Kirtipur, Nepal.
Jazyk: angličtina
Zdroj: Heliyon [Heliyon] 2024 Aug 16; Vol. 10 (16), pp. e36496. Date of Electronic Publication: 2024 Aug 16 (Print Publication: 2024).
DOI: 10.1016/j.heliyon.2024.e36496
Abstrakt: Raw mango peel (RMP) was first saponified to yield saponified mango peel (SMP), which was then loaded with Zr(IV) ions to form a biosorbent for As(III) scavenging.The biosorption behaviors and mechanisms of As(III) scavenging using RMP and Zr(IV)-loaded saponified mango peel (Zr(IV)-SMP) were investigated batchwise. The As(III) scavenging efficiency of RMP increased from 20.13 % to 87.32 % after Zr(IV) loading. Optimum contact time of 6 h has been investigated for As(III) scavenging by Zr(IV)-SMP, and the data on kinetics is well fitted to the pseudo-second-order (PSO) model. Similarly, isotherm data of Zr(IV)-SMP fitted well to the Langmuir isotherm model with the maximum As(III) scavenging potential of 45.52 mg/g. Chloride (Cl - ) and nitrate (NO 3 - ) have negligible influence on As(III) scavenging, but sulphate (SO 4 2- ) interferes significantly. The exhausted Zr(IV)-SMP could be easily regenerated by treating with 2MNaOH. A mechanistic study indicates that As(III) scavenging is primarily contributed to electrostatic interaction and ligand exchange, which is confirmed from both instrumental and chemical characterizations techniques. Tubewell underground water polluted with a trace amount of arsenic (98.63 μg/L) could be successfully lowered down to the WHO standard (10 μg/L) by applying a small amount of Zr(IV)-SMP. Therefore, the Zr(IV)-SMP investigated in this work can be a low-cost, environmentally benign, and promising alternative for scavenging trace levels of arsenic from contaminated water.
Competing Interests: 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.
(© 2024 The Authors.)
Databáze: MEDLINE
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