Development of a sorption system for heavy metals in water by thiophosphorylation of green coconut (Cocos nucifera) fibers

• Grant number: 05/01604-0
• Support Opportunities: Regular Research Grants
• Start date: September 01, 2005
• End date: August 31, 2007
• Field of knowledge: Physical Sciences and Mathematics - Chemistry - Inorganic Chemistry
• Principal Investigator: Breno Pannia Esposito
• Grantee: Breno Pannia Esposito
• Host Institution: Instituto de Química (IQ). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

Lignocellulosic residues are promptly available, becoming interesting starting materials for the production of heavy metals sorption systems in aqueous medium. From the environmental point of view this strategy is interesting because (a) it involves the reuse of a residue and (b) the end material can be used for heavy metal removal. In this project, green coconut (Cocos nucifera) whole fibers will be functionalized with thiophosphoryl chloride, Cl3P=S, and dimethylchlorothiophosphate, (CH3O)2ClP=S. The interactions of the functionalized fiber with heavy metal cations such as Cr3+, Cd2+, Hg2+ and Pb2+ will be followed by spectroscopic and thermoanalytical methods. (AU)