Removal of cadmium and zinc ions from industrial wastewater using nanocomposites of PANI/ZnO and PANI/CoHCF: a comparative study

Polyaniline Modified with Cobalt-Hexacyanoferrate (PmCH) as an Adsorbent for Removal of Heavy Metals from Aqueous Solutions

“…The pseudo-first-order (equation 2) and the pseudo-second-order kinetic (equation 3) models have been applied to determine and describe the kinetic process of liquid-solid phase [2]: Studies showed that more than 90% of the total adsorption occurs within the first 100-150 min and the concentration approached their equilibrium value at 200-400 min, which can be confirmed by h value in Table 1. The initial adsorbent rate of Rb + was clearly more than the others.…”

“…The XRD patterns of polyaniline and PmCH are depicted in figure correspond to C-H bending, C-N bonds in the benzenoid rings, C-N bonds in the quinoid rings, benzenoid rings, and quinoid rings, respectively [2]. A broad bond at around 3100-3650 and 2850-2950 cm -1 are assigned to O-H stretching for the hydrogen bonded hydroxyl groups and the alkyl stretching groups, respectively [3].…”

“…Ni(NO 3 ) 2 , cobalt (II) chloride hexahydrate, aniline, HCl, KOH, ammonium peroxydisulfate, Pb(NO 3 ) 2 , ZnCl 2 , Cd(NO 3 ) 2 , and RbCl were used in analytical grade (Germany, Merk). FTIR (Bruker, Vector 22) and XRD (STOE, STIDY-MP, Germany) measurements were performed to detect the morphological studies of polyaniline and PmCH.…”

“…The adsorbent dosage was considered at 3.5 gr L -1 . The adsorption capacity and ion removal were calculated by [2]:…”

“…One of the most popular techniques to removal of these toxic compounds is adsorption process [2]. Due to strong adsorption capability to removal of metal ions, polyaniline can be used as a good prospect for adsorption applications [3].…”