Hydrolysis of 4-nitrophenyl phosphate by magnetite or fly ash: A model for the fate

  • Fikru Tafesse Chemistry Department, University of Transkei, Private Bag X1, UNITRA, Umtata 5117, Republic of South Africa
  • B.S. Nakani Chemistry Department, University of Transkei, Private Bag X1, UNITRA, Umtata 5117, Republic of South Africa
  • Ntsapokazi C. Deppa Chemistry Department, University of Transkei, Private Bag X1, UNITRA, Umtata 5117, Republic of South Africa

Abstract

Reaction of fly ash or magnetite towards hydrolysis of 4-nitrophenyl phosphate (NPP) was investigated in both the solid and solution phases at 10-3 M concentration in oil-in-water microemulsions and aqueous media. The reactions were monitored by measuring the absorbance of the nitrophenolate ion produced in the reaction aliquots with time. The possible application of the above systems for environmental decontamination of organophosphates is discussed. The study provides the basis for increasing our knowledge of the fate of persistent organophosphates in the soil and provides a possible application to environmental clean-up problems.

(Bulletin of The Chemical Society of Ethiopia: 2002 16 (2): 133-140)
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Articles

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eISSN: 1726-801X
print ISSN: 1011-3924