Removal of Cr(VI) from aqueous solution by biochar derived from rice husk

Mohadi, Risfidian; Palapa, Neza Rahayu; Taher, Tarmizi; Siregar, Patimah Mega Syah Bahar Nur; Normah,; Juleanti, Novie; Wijaya, Alfan; Lesbani, Aldes

doi:10.21924/cst.6.1.2021.293

Cited by 9 publications

(6 citation statements)

References 51 publications

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“…This research characterizes rambutan skin (Nephelium lappaceum L) using an FT-IR spectrophotometer which produces a vibration peak at 1716.61 cm -1 which indicates the presence of a non-ionic carbonyl group (C=O) (Zhang et al, 2018). At the peak of 3419.33 cm -1 there is a group (O-H) derived from the alcohol and carboxylic acid groups (Mohadi, Palapa, Taher, et al, 2021). Characteristics of the successful preparation of rambutan peel as an adsorbent was supported by adsorption-desorption analysis of nitrogen which resulted in isotherm patterns, data on surface area, pore volume, and pore diameter.…”

Section: Resultsmentioning

confidence: 98%

Utilization of Rambutan Peel as s Potential Adsorbent for the Adsorption of Malachite Green, Procion Red, and Congo Red Dyes

Hasanah¹,

Juleanti²,

Priambodo³

et al. 2022

Ecol. Eng. Environ. Technol.

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Bioadsorbent preparation from rambutan peel applied as adsorbent was characterized using FT-IR, SEM-EDS, BET and TG-DTA analysis. FTIR analysis showed the presence of specific cellulose compounds in the rambutan peel bioadsorbent, the rambutan peel bioadsorbent was amorphous, there were wavy and uneven pores in the morphology of the rambutan peel and had the highest elemental content of 74.3%, the surface area of the rambutan peel was 1.22 cm/g. The adsorption process was applied to malachite green, congo red, and procion red dyes with parameters such as pH, kinetics, isotherm and thermodynamics. Based on kinetic parameters, the adsorption process of malachite green, congo red, and procion red using rambutan peel tends to follow the pseudo second order kinetic model. The adsorption capacity achieved was 182.40 mg/g in procion red, 6.24 mg/g in congo red, and 11.73 mg/g in malachite green. The adsorption process takes place spontaneously which is indicated by a negative Gibs free energy value.

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Section: Resultsmentioning

confidence: 98%

Utilization of Rambutan Peel as s Potential Adsorbent for the Adsorption of Malachite Green, Procion Red, and Congo Red Dyes

Hasanah¹,

Juleanti²,

Priambodo³

et al. 2022

Ecol. Eng. Environ. Technol.

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“…The increasing temperature has made the viscosity of the liquid decreased and the rate of diffusion in adsorbate through boundary layer and internal pore of the adsorbent increased [43]. This tendency occurred when the saturation value was attained, and the adsorption was considered to be promoted by high temperature and occupied an inactive site onto adsorbents [44] The enthalpy parameter (∆H o ) predicted the adsorption mechanisms such as chemisorption or physisorption. The result showed that the enthalpy value of 75.2084 kJ/mol included in the range of 20.9 < H o < 418.4 kJ/mol, showing that the adsorption is included in chemical adsorption [42].…”

Section: Thermodynamic Studymentioning

confidence: 99%

Adsorption studies of KOH-modified hydrochar derived from sugarcane bagasse for dye removal: Kinetic, isotherm, and thermodynamic study

Lestari

Yuliansyah

Budiman

2022

CST

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Toxicity of methylene blue (MB) in water bodies has a negative effect on environment and living organisms. The presence of MB in water could last longer in view of the non-biodegradable characteristic. In this study, hydrochar was used as adsorbent to remove MB from aqueous solution. Hydrochar derived from bagasse was successfully prepared by hydrothermal carbonization treatment at temperature of 270oC, and pressure of 10 Bar for 30 minutes. For enhancing the adsorption ability, hydrochar was activated by adding KOH that was able to increase the percent removal by ~11%. The hydrochar was characterized using FTIR before and after adsorption. The results showed that the dominant functional groups of hydrochar included O-H, C=O, -O- and aromatic compounds. Whereas, the functional group of azo groups such as N-H and N=N appeared after adsorption. The maximum adsorption capacity (Qmax) was 5.1204 mg/g, while the adsorption isotherm of MB onto hydrochar followed the Langmuir and Freundlich model. The adsorption mechanism belongs to chemical adsorption, and the rate of diffusion can be neglected because the adsorption kinetics fitted well with pseudo-second order and the value of k2 > kdif > k1. Thermodynamic studies indicated that the adsorption process is classified as endothermic and reversible at room temperature. The results showed that hydrochar could be the alternative adsorbent for removing MB in wastewater. In addition, sugarcane bagasse has a great potential as feedstock of hydrochar.

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“…Hydrochar has a chemical composition, which is similar to coal at the lowest level such as peat or lignite (Kantakanit et al, 2018;Mlonka-Mędrala et al, 2022). Hydrochar has many uses, one of which can be used as a pollutant-absorbent material Islam et al, 2017. Hydrochar is a material that has a high carbon content and is rich in oxygenated functional groups such as hydroxyl, carbonyl, or carboxylate, with high hydrophilic properties and good chemical reactivity (Zhang et al, 2017;Mohadi et al, 2022b).…”

Section: Introductionmentioning

confidence: 99%

Study and Characterization of Hydrochar from Duku (Lansium domesticum) Peel

Fitri

Ardiansyah

2023

IJMR

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Peel of duku fruit (Lansium domesticum) was prepared into hydrochar by using hydrothermal carbonation method at heating time variation of 8, 10, 12, 24 hours and temperature variation of 200 and 250°C. X-Ray Diffraction (XRD), Fourier Transform Infra Red (FT-IR), Brunauer Emmet Teller (BET) and Scanning Electron Microscope (SEM) analyses were conducted to determine at what time and temperature variations the adsorbent had the best adsorption quality. Based on the characteristics of the adsorbent, it can be seen that the best hydrochar is at 12 hours and at a temperature of 200°C. X-Ray Diffraction (XRD) analysis showed the presence of diffraction peaks at angles of 15.7° and 22.79° Fourier Transform Infra Red (FT-IR) analysis obtained explained that there were peaks of vibration peaks namely -OH, -CH, =CH, C=O, C=C aromatic and aliphatic. Brunauer Emmet Teller (BET) analysis can be seen that the increase in surface area on duku fruit peel (Lansium domesticum) and hydrochar at 200°C from 12.343 m2 /g to 22.635 m2 /g. Scanning Electron Microscope (SEM) analysis shows that the surface peel of duku fruit (Lansium domesticum) material has a clumped surface morphology in the same phase or also called aggregation, while the hydrochar tends to have an irregular shape or can be called heterogeneous morphology.

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Removal of Cr(VI) from aqueous solution by biochar derived from rice husk

Cited by 9 publications

References 51 publications

Utilization of Rambutan Peel as s Potential Adsorbent for the Adsorption of Malachite Green, Procion Red, and Congo Red Dyes

Utilization of Rambutan Peel as s Potential Adsorbent for the Adsorption of Malachite Green, Procion Red, and Congo Red Dyes

Adsorption studies of KOH-modified hydrochar derived from sugarcane bagasse for dye removal: Kinetic, isotherm, and thermodynamic study

Study and Characterization of Hydrochar from Duku (Lansium domesticum) Peel

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