Electro-sorption of ammonium ion onto nickel foam supported highly microporous activated carbon prepared from agricultural residues (dried Luffa cylindrica)

Yu Jen Shih, Cheng Di Dong, Yao-Hui Huang, C. P. Huang

Research output: Contribution to journalArticle

Abstract

An electrode made of loofah sponge derived activated carbon supported on nickel foam (AC/Ni) was successfully fabricated and used to remove ammonium ion (NH 4 + ) from aqueous solution. A multilayer adsorption isotherm was used to describe ammonium electro-sorption on AC/Ni electrodes at different temperature, initial NH 4 + concentration, and electrical field. The cyclic voltammetry (CV) results suggested that the electrical capacitance of AC/Ni electrodes, with the AC being prepared without preheating (OAC) or with low temperature heating (i.e., 300 AC), were higher than those prepared at high preheating temperature (i.e., 400 AC and 500 AC). Increasing the electro-sorption temperature from 10 to 50 °C decreased the monolayer NH 4 + adsorption capacity from 5 to ca. 2–3 mg-N g −1 , respectively. Background electrolyte, namely, sodium sulfate, exhibited significant competitive effect on the adsorption of ammonium ion at sodium ion concentration > 10 −2 M. The activation energy and heat of adsorption were 9–23.2 kJ mol −1 and −3.7–−10.7 kJ mol −1 , respectively, indicating a physisorption and exothermic adsorption characteristics. Based on the kinetics and thermodynamics analysis, there was slight increase in the activation energy with elevating preheating temperature, which increased the quantity of micro-pores and surface heterogeneity of the AC materials. Overall, results clearly demonstrated that carbon pyrolysis played a role on the capacitive charging behaviors of electrodes and the efficiency of NH 4 + electro-sorption on the AC/Ni electrodes.

Original languageEnglish
Pages (from-to)296-305
Number of pages10
JournalScience of the Total Environment
Volume673
DOIs
Publication statusPublished - 2019 Jul 10

Fingerprint

Agricultural wastes
Nickel
foam
Ammonium Compounds
Activated carbon
activated carbon
Foams
Sorption
nickel
electrode
ammonium
sorption
Ions
Preheating
adsorption
Electrodes
ion
Adsorption
activation energy
Temperature

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

Cite this

@article{dbab1deaf60440959508aa64ea2dca20,
title = "Electro-sorption of ammonium ion onto nickel foam supported highly microporous activated carbon prepared from agricultural residues (dried Luffa cylindrica)",
abstract = "An electrode made of loofah sponge derived activated carbon supported on nickel foam (AC/Ni) was successfully fabricated and used to remove ammonium ion (NH 4 + ) from aqueous solution. A multilayer adsorption isotherm was used to describe ammonium electro-sorption on AC/Ni electrodes at different temperature, initial NH 4 + concentration, and electrical field. The cyclic voltammetry (CV) results suggested that the electrical capacitance of AC/Ni electrodes, with the AC being prepared without preheating (OAC) or with low temperature heating (i.e., 300 AC), were higher than those prepared at high preheating temperature (i.e., 400 AC and 500 AC). Increasing the electro-sorption temperature from 10 to 50 °C decreased the monolayer NH 4 + adsorption capacity from 5 to ca. 2–3 mg-N g −1 , respectively. Background electrolyte, namely, sodium sulfate, exhibited significant competitive effect on the adsorption of ammonium ion at sodium ion concentration > 10 −2 M. The activation energy and heat of adsorption were 9–23.2 kJ mol −1 and −3.7–−10.7 kJ mol −1 , respectively, indicating a physisorption and exothermic adsorption characteristics. Based on the kinetics and thermodynamics analysis, there was slight increase in the activation energy with elevating preheating temperature, which increased the quantity of micro-pores and surface heterogeneity of the AC materials. Overall, results clearly demonstrated that carbon pyrolysis played a role on the capacitive charging behaviors of electrodes and the efficiency of NH 4 + electro-sorption on the AC/Ni electrodes.",
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Electro-sorption of ammonium ion onto nickel foam supported highly microporous activated carbon prepared from agricultural residues (dried Luffa cylindrica). / Shih, Yu Jen; Dong, Cheng Di; Huang, Yao-Hui; Huang, C. P.

In: Science of the Total Environment, Vol. 673, 10.07.2019, p. 296-305.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Electro-sorption of ammonium ion onto nickel foam supported highly microporous activated carbon prepared from agricultural residues (dried Luffa cylindrica)

AU - Shih, Yu Jen

AU - Dong, Cheng Di

AU - Huang, Yao-Hui

AU - Huang, C. P.

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AB - An electrode made of loofah sponge derived activated carbon supported on nickel foam (AC/Ni) was successfully fabricated and used to remove ammonium ion (NH 4 + ) from aqueous solution. A multilayer adsorption isotherm was used to describe ammonium electro-sorption on AC/Ni electrodes at different temperature, initial NH 4 + concentration, and electrical field. The cyclic voltammetry (CV) results suggested that the electrical capacitance of AC/Ni electrodes, with the AC being prepared without preheating (OAC) or with low temperature heating (i.e., 300 AC), were higher than those prepared at high preheating temperature (i.e., 400 AC and 500 AC). Increasing the electro-sorption temperature from 10 to 50 °C decreased the monolayer NH 4 + adsorption capacity from 5 to ca. 2–3 mg-N g −1 , respectively. Background electrolyte, namely, sodium sulfate, exhibited significant competitive effect on the adsorption of ammonium ion at sodium ion concentration > 10 −2 M. The activation energy and heat of adsorption were 9–23.2 kJ mol −1 and −3.7–−10.7 kJ mol −1 , respectively, indicating a physisorption and exothermic adsorption characteristics. Based on the kinetics and thermodynamics analysis, there was slight increase in the activation energy with elevating preheating temperature, which increased the quantity of micro-pores and surface heterogeneity of the AC materials. Overall, results clearly demonstrated that carbon pyrolysis played a role on the capacitive charging behaviors of electrodes and the efficiency of NH 4 + electro-sorption on the AC/Ni electrodes.

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