Preparation of activated carbons from pecan nutshell and their application in the antagonistic adsorption of heavy metal ions

2017 ◽  
Vol 230 ◽  
pp. 686-695 ◽  
Author(s):  
I.A. Aguayo-Villarreal ◽  
A. Bonilla-Petriciolet ◽  
R. Muñiz-Valencia
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Activated Carbons ◽  
Pecan Nutshell

Adsorptive removal of heavy metal ions by activated carbons

TANSO ◽  
2011 ◽  
Vol 2011 (247) ◽  
pp. 62-69 ◽  
Author(s):  
Motoi Machida ◽  
Yoshimasa Amano ◽  
Masami Aikawa
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Activated Carbons ◽  
Adsorptive Removal

scholarly journals Sorption of Heavy Metals from Mine Wastewater by Activated Carbons Prepared from Coconut Husk

2016 ◽  
Vol 16 (2) ◽  
pp. 36-41
Author(s):  
W. K. Buah ◽  
J. R. Dankwah
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Metal Ions ◽  
Environmental Protection Agency ◽  
Heavy Metal Ions ◽  
Activated Carbons ◽  
Steam Activation ◽  
Coconut Husk ◽  
Mine Wastewater ◽  
Addition Rate

A study on sorption of heavy metal ions: Lead (Pb2+), Copper (Cu2+) and Cadmium (Cd2+) from mine wastewater by activated carbons prepared from coconut husk was conducted.  The activated carbons were prepared by carbonisation of the husk at 900 ºC pyrolysis temperature, followed by steam activation of the pyrolysis derived char. Activation was also performed at 900 ºC for various durations at steam addition rate of 0.2 mol/h/g in a Gas Fired Static Bed Pyrolysis-Activation Reactor. The derived activated carbons were contacted with mine wastewater containing heavy metal ions to assess their heavy metal ions adsorption potential. The results show that the activated carbons efficiently adsorbed the heavy metal ions from solution, reducing concentrations of  Pb2+, Cu2+ and Cd2+ from 1.56 mg/L, 1.87 mg/L and 0.69 mg/L respectively to below Ghana Environmental Protection Agency (GEPA) standards of  0.10 mg/L, 1.30 mg/L and 0.03 mg/L for Pb2+, Cu2+ and Cd2+ respectively. The significances of this study are that, the conversion of the coconut husk to activated carbons provides a solution to environmental problems associated with dumping of the waste and also provides valuable products capable of reducing the effects of heavy metals in wastewater.  Keywords: Coconut Husk, Activated Carbon, Heavy Metal, Adsorption

scholarly journals Removal of Heavy Metal Ions with Acid Activated Carbons Derived from Oil Palm and Coconut Shells

Materials ◽  
2014 ◽  
Vol 7 (5) ◽  
pp. 3634-3650 ◽  
Author(s):  
Mokhlesur Rahman ◽  
Mohd Adil ◽  
Alias Yusof ◽  
Yunus Kamaruzzaman ◽  
Rezaul Ansary
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Oil Palm ◽  
Heavy Metal Ions ◽  
Activated Carbons ◽  
Coconut Shells

scholarly journals Removal of Heavy Metal Ions from One- and Two-Component Solutions via Adsorption on N-Doped Activated Carbon

Materials ◽  
2021 ◽  
Vol 14 (22) ◽  
pp. 7045
Author(s):  
Justyna Kazmierczak-Razna ◽  
Anetta Zioła-Frankowska ◽  
Piotr Nowicki ◽  
Marcin Frankowski ◽  
Robert Wolski ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Activated Carbon ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Contact Time ◽  
Heavy Metal Ions ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Phase Contact ◽  
Phase Contact Time

This paper deals with the adsorption of heavy metal ions (Cu2+ and Zn2+) on the carbonaceous materials obtained by chemical activation and ammoxidation of Polish brown coal. The effects of phase contact time, initial metal ion concentration, solution pH, and temperature, as well as the presence of competitive ions in solution, on the adsorption capacity of activated carbons were examined. It has been shown that the sample modified by introduction of nitrogen functional groups into carbon structure exhibits a greater ability to uptake heavy metals than unmodified activated carbon. It has also been found that the adsorption capacity increases with the increasing initial concentration of the solution and the phase contact time. The maximum adsorption was found at pH = 8.0 for Cu(II) and pH = 6.0 for Zn(II). For all samples, better fit to the experimental data was obtained with a Langmuir isotherm than a Freundlich one. A better fit of the kinetic data was achieved using the pseudo-second order model.

Study on Sewage Sludge-based Activated Carbons with Natural Mineral Modification for Enhanced Removal of Heavy Metal Ions from Aqueous Solution

2021 ◽  
Vol 14 ◽  
Author(s):  
Guoqiao Wang ◽  
Sicong Yao ◽  
Yao Chen ◽  
Meicheng Wang ◽  
Lizhi He
Keyword(s):  
Aqueous Solution ◽  
Heavy Metal ◽  
Sewage Sludge ◽  
Metal Ions ◽  
Heavy Metal Ions ◽  
Activated Carbons ◽  
Chemical Activation ◽  
Bet Surface Area ◽  
Adsorptive Capacity ◽  
Order Kinetic

: Activated carbons were prepared from sewage sludge by chemical activation with pyrolusite (PAC) and lithium-silicon powder addition (LSAC) to develop effective adsorbents for the removal of Cu(II), Pb(II), Cd(II) and Cr(III) metal ions from aqueous solution. Both modifiers with optimum dosage 1% (wt.) were demonstrated to exhibit important effects on the formation of adsorbent’s pore structure. PAC and LSAC showed 17.06% and 8.38% higher BET surface area than the common one without modification (AC). The XPS result showed that after modification, the hydroxyl and carboxyl groups on modified activated carbons surface were remarkably improved comparing with the ordinary carbon. The adsorption results in single ion solution showed that the metal ions’ removal rates were 13~29% and 20~43% increment, respectively, by LSAC and PAC comparing with AC’s. Adsorption isotherm and kinetics studies showed that adsorption of heavy metal ions onto the modified adsorbents was well fitted by the Langmuir isotherm and could be described by the pseudo-second-order kinetic model. In a multi-ions solution system, the produced carbons showed high affinity and good selective adsorptive capacity on Cu (II), Pb (II) removal, while an improvement adsorption towards Cd(II) and Cr(III) were observed. It will help a lot in wastewater industries due to its efficiency and low-price.

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