Studies of Kinetic and Thermo dynamic of competitive adsorption Of Cu+۲ and Zn+۲ on modified multi-walled carbon nanotubes

The presenc e of toxic he avy metal ions in the w ater and wastewater over the permissible limits pose a significan threat to the environment and p ublic healt h. In view of the toxicity, increm ental a ccumulatio n in the fo od chain and persistence in the ec osystem, wastewaters containing heavy metals are required to be properly treated prior to discharge into receiving wa ters [۱]. S everal treatment m ethods have been investigated for th e removal o f metal ion s from water and waste water. These metho ds include chemical precipitation, membrane filtration, io n exchange, and adsorption. Carbon nano tubes (CNT s), a new f orm of carbon, have co me under intense multi disciplinary study b ecause of t heir unique physical an d chemical p roperties, C NTs include single-wal l (SWCNTs ) and multiwall (M WCNTs) d epending on the number of layers comprising them [۲]. The objectiv es of this investig ation were t o adsorption kinetic, equ ilibrium isotherm and t hermodynam ic paramete rs.

کلیدواژه ها:

Carbon nanotubes ، Thermodynamic ، Kinetic ، C ompetitive adsorption