Novel cross-linked melamine based polyamine/CNT composites for lead ions removal.
A novel series of polyamine/CNT composites were synthesized via a single step polycondensation reaction of melamine, paraformaldehyde, various alkyldiamines and chlorinated carbon nanotubes (CNT) at optimized reaction conditions in the presence of N, N-Dimethyl formamide as a solvent. Chlorinated carbon nanotubes synthesized by reacting acidified CNT and thionyl chloride was used. The pure polymer (MFDH) and the functionalized composites (MFDH1, MFDH2, MFDH3 and MFDH4) having 0.01, 0.02, 0.05 and 0.1% weight of the starting precursors were used. The morphology, surface area, molecular structures and overall properties of the new series of polymers were characterized using Raman Spectroscopy, FT-IR,13C NMR, X-ray diffraction experiments, BET and TGA. A comprehensive design was set up in order to evaluate the effects of pH, temperature, Lead ion initial concentrations and contact time on the ability of the new series of functionalized polymers for Lead (II) ion removal. Wastewater treatment revealed the high efficacy of the synthesized polyamine/CNT composite in the removal of ∼99% of Lead ions in wastewater samples.
Chemistry Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia. Electronic address: othmanc@kfupm.edu.sa.
Othman Charles S
OCS
Al Hamouz
Chemistry Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.
Isaiah Olabisi
IO
Adelabu
Chemistry Department, King Fahd University of Petroleum & Minerals, Dhahran 31261, Saudi Arabia.
Tawfik A
TA
Saleh
D005557:Formaldehyde / Q000737:chemistry; D007854:Lead / Q000737:chemistry*; D015394:Molecular Structure; D037742:Nanotubes, Carbon / Q000737:chemistry*; D011073:Polyamines / Q000737:chemistry*; D011108:Polymers / Q000737:chemistry; D017550:Spectroscopy, Fourier Transform Infrared; D013059:Spectrum Analysis, Raman; D013499:Surface Properties; D013696:Temperature; D014227:Triazines / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D014961:X-Ray Diffraction
D037742:Nanotubes, Carbon; D011073:Polyamines; D011108:Polymers; D014227:Triazines; D014874:Water Pollutants, Chemical; D005557:Formaldehyde; D007854:Lead; C011907:melamine; C003043:paraform
Adsorption; Composite: polyamine/CNT composite; Lead (II) ions; Melamine; Wastewater treatment