Competitive Adsorption of Aqueous Metal Ions on an Oxidized Nanoporous Activated Carbon

The preparation of activated carbon (AC) fromRicinus communisleaves was investigated in this paper. Orthogonal array experimental design method was used to optimize the preparation of AC using microwave assisted zinc chloride. Optimized parameters were radiation power of 100 W, radiation time of 8 min, concentration of zinc chloride of 30% by volume, and impregnation time of 24 h, respectively. The surface characteristics of the AC prepared under optimized conditions were examined by pHZPC, SEM-EDAX, XRD, and FTIR. Competitive adsorption of Ni2+ions onRicinus communisleaves by microwave assisted zinc chloride chemical activation (ZLRC) present in binary and ternary mixture was compared with the single metal solution. The effects of the presence of one metal ion on the adsorption of the other metal ion were investigated. The experimental results indicated that the uptake capacity of one metal ion was reduced by the presence of the other metal ion. The extent of adsorption capacity of the binary and ternary metal ions tested on ZLRC was low (48–69%) as compared to single metal ions. Comparisons with the biosorption of Ni2+ions by the biomass of ZLRC in the binary (48.98–68.41%-~Ni-Cu and 69.76–66.29%-~Ni-Cr) and ternary solution (67.32–57.07%-~Ni–Cu and Cr) could lead to the conclusion that biosorption of Ni2+ions was reduced by the influence of Cu2+and Cr3+ions. The equilibrium data of the adsorption was well fitted to the Langmuir isotherm. The adsorption process follows the pseudo-second-order kinetic model.

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Optimization of parameters for competitive adsorption of heavy metal ions (Pb+2, Ni+2, Cd+2) onto activated carbon

Korean Journal of Chemical Engineering ◽

10.1007/s11814-013-0280-8 ◽

2014 ◽

Vol 31 (4) ◽

pp. 692-700 ◽

Cited By ~ 27

Author(s):

Mohammad Kavand ◽

Tahereh Kaghazchi ◽

Mansooreh Soleimani

Keyword(s):

Heavy Metal ◽

Activated Carbon ◽

Metal Ions ◽

Heavy Metal Ions ◽

Competitive Adsorption ◽

Optimization Of Parameters

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Hybrid capacitive deionization of NaCl and toxic heavy metal ions using faradic electrodes of silver nanospheres decorated pomegranate peel-derived activated carbon

Environmental Research ◽

10.1016/j.envres.2021.111110 ◽

2021 ◽

Vol 197 ◽

pp. 111110

Author(s):

G. Bharath ◽

Abdul Hai ◽

K. Rambabu ◽

Faheem Ahmed ◽

Ahmed S. Haidyrah ◽

...

Keyword(s):

Heavy Metal ◽

Activated Carbon ◽

Metal Ions ◽

Heavy Metal Ions ◽

Capacitive Deionization ◽

Pomegranate Peel ◽

Toxic Heavy Metal ◽

Silver Nanospheres

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Adsorption of Hexavalent Chromium and Divalent Lead Ions on the Nitrogen-Enriched Chitosan-Based Activated Carbon

Nanomaterials ◽

10.3390/nano11081907 ◽

2021 ◽

Vol 11 (8) ◽

pp. 1907

Author(s):

Fatma Hussain Emamy ◽

Ali Bumajdad ◽

Jerzy P. Lukaszewicz

Keyword(s):

Heavy Metal ◽

Activated Carbon ◽

Metal Ions ◽

Metal Removal ◽

High Surface ◽

Heavy Metal Removal ◽

High Surface Area ◽

Kinetics Of Adsorption ◽

Removal Of Heavy Metals ◽

Pseudo Second Order

Optimizing the physicochemical properties of the chitosan-based activated carbon (Ch-ACs) can greatly enhance its performance toward heavy metal removal from contaminated water. Herein, Ch was converted into a high surface area (1556 m2/g) and porous (0.69 cm3/g) ACs with large content of nitrogen (~16 wt%) using K2CO3 activator and urea as nitrogen-enrichment agents. The prepared Ch-ACs were tested for the removal of Cr(VI) and Pb(II) at different pH, initial metal ions concentration, time, activated carbon dosage, and temperature. For Cr(VI), the best removal was at pH = 2, while for Pb(II) the best pH for its removal was in the range of 4–6. At 25 °C, the Temkin model gives the best fit for the adsorption of Cr(VI), while the Langmuir model was found to be better for Pb(II) ions. The kinetics of adsorption of both heavy metal ions were found to be well-fitted by a pseudo-second-order model. The findings show that the efficiency and the green properties (availability, recyclability, and cost effectiveness) of the developed adsorbent made it a good candidate for wastewaters treatment. As preliminary work, the prepared sorbent was also tested regarding the removal of heavy metals and other contaminations from real wastewater and the obtained results were found to be promising.

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Nanoporous Activated Carbon Derived from Rice Husk for High Performance Supercapacitor

Journal of Nanomaterials ◽

10.1155/2014/714010 ◽

2014 ◽

Vol 2014 ◽

pp. 1-7 ◽

Cited By ~ 10

Author(s):

Huaxing Xu ◽

Biao Gao ◽

Hao Cao ◽

Xueyang Chen ◽

Ling Yu ◽

...

Keyword(s):

Activated Carbon ◽

Specific Capacitance ◽

Current Density ◽

Average Pore Size ◽

Nanoporous Carbon ◽

Cycle Life ◽

Potential Candidate ◽

Average Pore ◽

Nanoporous Activated Carbon

Nanoporous activated carbon material was produced from the waste rice husks (RHs) by precarbonizing RHs and activating with KOH. The morphology, structure, and specific surface area were investigated. The nanoporous carbon has the average pore size of 2.2 nm and high specific area of 2523.4 m2 g−1. The specific capacitance of the nanoporous carbon is calculated to be 250 F g−1at the current density of 1 A g−1and remains 80% for 198 F g−1at the current density of 20 A g−1. The nanoporous carbon electrode exhibits long-term cycle life and could keep stable capacitance till 10,000 cycles. The consistently high specific capacitance, rate capacity, and long-term cycle life ability makes it a potential candidate as electrode material for supercapacitor.

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