Potable water recovery from As, U, and F contaminated ground waters by direct contact membrane distillation process

Saketa Yarlagadda, Veera Gnaneswar Gude, Lucy Mar Camacho, Saireddy Pinappu, Shuguang Deng

Research output: Contribution to journalArticle

57 Scopus citations

Abstract

In this study, the feasibility of the direct contact membrane distillation (DCMD) process to recover arsenic, uranium and fluoride contaminated saline ground waters was investigated. Two types of membranes (polypropylene, PP; and polytetrafluoroethylene, PTFE) were tested to compare the permeate production rates and contaminant removal efficiencies. Several experiments were conducted to study the effect of salts, arsenic, fluoride and uranium concentrations (synthetic brackish water with salts: 1000-10,000. ppm; arsenic and uranium: 10-400. ppb; fluoride: 1-30. ppm) on the desalination efficiency. The effect of process variables such as feed flow rate, feed temperature and pore size was studied. The experimental results proved that the DCMD process is able to achieve over 99% rejection of the salts, arsenic, fluoride and uranium contaminants and produced a high quality permeate suitable for many beneficial uses. The ability to utilize the low grade heat sources makes the DCMD process a viable option to recover potable water from a variety of impaired ground waters.

Original languageEnglish (US)
Pages (from-to)1388-1394
Number of pages7
JournalJournal of Hazardous Materials
Volume192
Issue number3
DOIs
StatePublished - Sep 15 2011
Externally publishedYes

Keywords

  • Arsenic
  • Desalination
  • Fluoride
  • Membrane distillation
  • Uranium
  • Water treatment

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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