Effect of the temperature in adsorption phenomena of water onto Sub-Bituminous coal

Acevedo, Esteban Alberto Taborda; Jurado, William J.; Cortés, Farid B.

doi:10.15446/rbct.n39.54127

Cited by 2 publications

(1 citation statement)

References 30 publications

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“…Therefore, the selection of the right adsorbent material is very important. One potential adsorbent that can be used in soil and water amelioration technology is low-rank coal such as lignite (Yuliani, 2015;Robles et al, 2016;Cheng et al, 2023) and sub-bituminous coal (Solihin et al, 2002;Taborda et al, 2015;Rahmadian et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Equilibrium study for mercury removal using sub-bituminous coal and its application on ex-gold mining soil contaminated with mercury

Maulana,

Harianti,

Prasetyo

et al. 2024

J. Degrade. Min. Land Manage.

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Optimizing the potential utilization of low-rank coal, such as sub-bituminous coal (SC), can improve and maintain soil quality and productivity through amelioration technology. This potential is especially in controlling heavy metals such as Hg. This study aimed to examine the geochemistry of SC and the adsorption mechanism of Hg with SC through an adsorption isotherm model approach developed for experimental equilibrium. The geochemical of SC has an atomic composition of C (43.60%), O (40.64%), N (11.96%), Si (1.57%), Al (1.06%), Ca (0.92%), Mg (0.14%) and K (0.11%) and oxide composition dominated by SiO2 (57.07%), as well as O-H and N-H functional groups, C-H C-H, C=C-H, C=O, and C=C-H and minerals (quartz, magnetite, mica and muscovite). Characteristics of SC have a proximate composition (16.99% moisture, 97.81% volatile matter, 69.63% ash, and 28.19% fixed carbon) and chemical properties of pH, EC, CEC, OC, and total N (5.23, 1.38 dS m-1, 35.33 cmol(+) kg-1, 9.81% C, and 0.16% N). The adsorption capacity and coefficient of Hg2+ by SC were 304.32 mg g-1 and 78.67 L kg-1 at pH 1.26 and Hg2+ concentration 100 mg L-1 with a removal efficiency of 76.08%. Hg2+ adsorption isotherms occurred in Langmuir (RL = 0.97 and R² = 1)>Freundlich (1/n = 1.05 and R² = 0.9999) models. The application of 40 t SC ha-1 on ex-gold mining soil contaminated with Hg significantly decreased the total Hg in the soil by 2.50 mg kg-1 and a removal efficiency of 36.37% with increased pH H2O (0.35), OC (0.041% C), and CEC 2.14 cmol(+) kg-1, compared to control.

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Section: Introductionmentioning

confidence: 99%

Equilibrium study for mercury removal using sub-bituminous coal and its application on ex-gold mining soil contaminated with mercury

Maulana,

Harianti,

Prasetyo

et al. 2024

J. Degrade. Min. Land Manage.

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Aprovechamiento de residuos de Eichhornia Crassipes para la remoción de Cr (vi) en aguas residuales simuladas

et al. 2022

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Eichhornia crassipes es una planta considerada una plaga para los diferentes ecosistemas acuáticos en el mundo. Además el Cr (VI) es un contaminante acuático altamente tóxico. Se estudió la capacidad de adsorción de la Eichhornia crassipes como bioadsorbente para la remoción de Cr (VI) presente en un agua residual simulada. La concentración del ion en solución, pH y temperatura fueron estudiadas como variables en un diseño experimental factorial simétrico, y mediante análisis ANOVA. La mayor capacidad de adsorción Cr (VI) (2.5 mgꞏg-1) se obtuvo a 75 ppm de Cr (VI), pH de 1.5 y 45 °C. Se observaron grupos funcionales superficiales que mediante atracción electrostática y formación de puentes de hidrógeno favorecieron la adsorción de Cr (VI). Esto permite concluir que el bioadsorbente es efectivo para la remoción de Cr (VI) en solución con un proceso simple y de bajo costo. Eichhornia crassipes commonly called water hyacinth, is a plant considered a pest for the different aquatic ecosystems in the world. Furthermore, Cr (VI) is a highly toxic aquatic pollutant. In order to contribute to the solution of these two environmental problems, the adsorption capacity of water hyacinth as a bioadsorbent was studied for the removal of Cr (VI) in a simulated wastewater. The ion concentration in solution, pH y temperature were studied using a symmetric factorial experimental design y applicating an ANOVA analysis. The highest Cr (VI) adsorption capacity (2.5 mgꞏg-1) was obtained at 75 ppm of Cr (VI), pH of 1.5 y 45 ° C. Surface functional groups were observed that, through electrostatic attraction y formation of hydrogen bonds, favored the adsorption of Cr (VI). This allows to conclude that this bioadsorbent is effective for the elimination of Cr (VI) in solution using a simple y low-cost process.

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Effect of the temperature in adsorption phenomena of water onto Sub-Bituminous coal

Cited by 2 publications

References 30 publications

Equilibrium study for mercury removal using sub-bituminous coal and its application on ex-gold mining soil contaminated with mercury

Equilibrium study for mercury removal using sub-bituminous coal and its application on ex-gold mining soil contaminated with mercury

Aprovechamiento de residuos de Eichhornia Crassipes para la remoción de Cr (vi) en aguas residuales simuladas

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