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Preparation of pectin based adsorbent for the uptake of phosphate anion from water

Author Affiliations

  • 1Central Department of Chemistry, Tribhuvan University, Kirtipur, Kathmandu, Nepal and Department of Chemistry, Amrit Campus, Tribhuvan University, Kathmandu, Nepal
  • 2Central Department of Chemistry, Tribhuvan University, Kirtipur, Kathmandu, Nepal
  • 3Central Department of Chemistry, Tribhuvan University, Kirtipur, Kathmandu, Nepal
  • 4Central Department of Chemistry, Tribhuvan University, Kirtipur, Kathmandu, Nepal and Department of Chemistry,Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu, Nepal
  • 5Central Department of Chemistry, Tribhuvan University, Kirtipur, Kathmandu, Nepal
  • 6Central Department of Chemistry, Tribhuvan University, Kirtipur, Kathmandu, Nepal

Res.J.chem.sci., Volume 10, Issue (3), Pages 16-24, October,18 (2020)


The natural anion exchanger was prepared from pectin enriched biomass of Mango fruit (Magnifera indica) by saponification followed by loading with trivalent iron i.e Fe(III) to eliminate phosphate from water. Characterization of adsorbent was done by elemental analysis and functional groups identification techniques. The result denoted that the phosphate adsorption using Fe(III)-SMW was easily controlled by switching pH value. The hydroxyl ions were released during uptake of phosphate using Fe(III)-SMW. The maximum uptake of Fe(III)-SMW for phosphate was determined as 4.08 mgg-1using Langmuir isotherm model. Phosphate concentration after adsorption sharply decreased with increasing solid-liquid ratio and reached 100% uptake by using Fe(III)-SMW. Adsorbed phosphate anion was effectively desorbed (99.56%) by using 1M NaOH solution. Therefore, Fe(III)-SMW adsorbent seems as a promising, low-priced and potential materialto treat trace amounts of phosphate anion present in polluted water.


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