Utilization of Charred Water Hyacinth (Jalkumvi) as Biosorbent for Removal of Ca(II) Ion from Aqueous Solution

Authors

  • Arun Bhujel Department of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu
  • Krishna Wagle Department of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu
  • Bishow Regmi Department of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu
  • Bibek Sapkota Department of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu
  • Bhoj Raj Poudel Department of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu
  • Surendra K Gautam Department of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu

DOI:

https://doi.org/10.3126/jncs.v42i1.35360

Keywords:

Charred water hyacinth, Freundlich adsorption isotherm, pseudo-second-order kinetics, SEM, EDX

Abstract

A promising adsorbent, charred water hyacinth (CWH) for the removal of Ca(II) from the aqueous solution was explored by heat treatment of water hyacinth followed by chemical activation with acidified zinc chloride (ZnCl2). The adsorbent was characterized using scanning electron microscopy (SEM) and electron dispersive X-ray (EDX) spectroscopy. Batch adsorption techniques were conducted for Ca(II) adsorption to assess the adsorption isotherm, effect of pH, contact time, initial Ca(II) concentration, adsorbent doses, and adsorption kinetics. The SEM micrograph illustrates the rough and irregular surface morphology and EDX spectra confirm the successful adsorption of Ca(II) on the adsorbent surface. The equilibrium adsorption data better fitted to the Freundlich isotherm model having a maximum adsorption capacity (qmax) of 319.75 mg/g. The highest percentage of adsorption was found at pH 1.5. The adsorption of Ca(II) by CWH decreased at the higher metal concentration and lower adsorbent doses. The adsorption of Ca(II) ions onto CWH followed the pseudo-second-order kinetics model. . Overall, these results suggested that the as-prepared CWH can be used as an eco-friendly, economical and efficient alternative for the removal of Ca(II)  from the aqueous solution.

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Published

2021-03-02

How to Cite

Bhujel, A., Wagle, K., Regmi, B., Sapkota, B., Poudel, B. R., & Gautam, S. K. (2021). Utilization of Charred Water Hyacinth (Jalkumvi) as Biosorbent for Removal of Ca(II) Ion from Aqueous Solution. Journal of Nepal Chemical Society, 42(1), 107–114. https://doi.org/10.3126/jncs.v42i1.35360

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Section

Research Article