Pre-concentration and determination of Pb(II) from water samples using modified multiwalled carbon nanotubes

Pb(ii) is a topically poisonous metal ion that can affect almost every organ and system in the body; it can accumulate in the body and cause kidney malfunctioning,hematological and brain damages. recently,carbon nanotubes (cnts),the nano-structured material,are applied for pre-concentration of heavy metal ions. this study investigates the pre-concentration of lead ion using oxidized multiwalled carbon nanotubes (mwcnt-cooh) via solid phase extraction method. mwcnt-cooh was prepared using as-synthesized mwcnt and the products were characterized by ftir,fesem,tem and tga. various factors influencing the separation and pre-concentration were investigated namely the effects of ph (2-7) and the elution conditions (type,concentration and volume of eluent). the best extraction conditions were sample of ph 5 and 5 ml of 1m hno3 as eluent. the developed method was successfully applied to the determination of trace quantities of pb(ii) in water samples with good analyte recoveries (90-102.5%). © 2015 penerbit utm press. all rights reserved.