Remediation of As Contaminated Soil using Phosphate and Colloidal Gas Aprons Suspension produced from Sapindus Mukorossi

Soumyadeep Mukhopadhyay, Sumona Mukherjee, Mohd Ali Hashim, Bhaskar Sen Gupta

Research output: Contribution to journalArticle

3 Citations (Scopus)
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Abstract

Phosphate and colloidal gas aphrons (CGAs) generated from saponin extracted from Sapindus mukorossi fruit, were evaluated for washing low levels of arsenic from an iron rich soil. Phosphate is one of the most commonly dispersed chemicals that increases arsenic mobility in soil due to their structural similarities, making it an important factor in arsenic removal process. Column washing experiments were performed with CGAs in down flow and up flow modes on soil of pH 5 and 6. Soapnut CGAs, when paired with phosphate removed up to 95 % arsenic while soapnut CGAs alone could only remove up to 70 % arsenic. The presence of phosphate improved efficiency of soapnut solution by up to 35 %. SEM image of washed soil revealed minor corrosion of soil surface while using phosphate with soapnut. Therefore, the addition of phosphates would have positive impact on soil washing using soapnut saponin.
Original languageEnglish
JournalBulletin of Environmental Contamination and Toxicology
Volume98
Issue number3
Early online date13 Jul 2016
DOIs
Publication statusPublished - Mar 2017

Keywords

  • Soapnut
  • Sapindus mukorossi
  • Soil remediation
  • Colloidal Gas Aphrons

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