Open Access2k Optimization approach for the removal of Pb2+ ions from water contaminated from oil-well drilling point on to MWCNTs
Author(s) -
A. T. Gbajabiamila,
Ishaq Kariim,
BO Ighobesuo
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/805/1/012013
Subject(s) - sorption , thermogravimetric analysis , sorbent , adsorption , fourier transform infrared spectroscopy , scanning electron microscope , materials science , carbon nanotube , metal ions in aqueous solution , chemical engineering , high resolution transmission electron microscopy , porosity , transmission electron microscopy , composite material , chemistry , metal , nanotechnology , organic chemistry , metallurgy , engineering
The release of Pb 2+ into the surrounding ecosystem has adverse effects on man and animal, hence, removing such harmful heavy metal from water system calls for urgent attention. The potential application of Multi-walled carbon nanotubes, MWCNTs, towards the lead (II) ions removal from oil polluted water body was studied and optimized via 2 k factorial experimental approach. The MWCNTs produced was characterized via High Resolution Transmission Electron Microscope (HR-TEM), High Resolution Scanning Electron microscope (HR-SEM), Thermogravimetric Analysis (TGA), Fourier Transform Infrared (FTIR) and Brenuer-Emmette-Teller (BET) to determine the internal morphology, surface morphology, thermal stability, functional group and surface area respectively. The results of the HR-TEM depict the nano-structural diameter of the produced MWCNTs with continuous strands of tubes as depicted by SEM micrograph. The MWCNTs surface area produced was obtained to be 540 m 2 /g. The sorption of Pb 2+ ions was optimized using 2k design approach where speed (rpm), absorbent dosage (g), temperature (°C) and time (min) were studied in a batch condition. The optimum conditions that give maximum sorption of Pb 2+ ions on to the surfaces and the pores of the developed MWCNTs adsorbent were obtained at 60 min contact time, 59.89 °C, 0.20 g of adsorbent dosage and 599.98 rpm of agitation. Thus, the highest percentage sorption of Pb 2+ ions by the MWCNTs from the oil-polluted water body was 99.5%. Hence, this study has demonstrated the potentials of MWCNTs as an effective and efficient sorbent for Pb 2+ sorption from oil polluted wastewater.