Synthesis of Fe-impregnated biochar from food waste for Selenium(Ⅵ) removal from aqueous solution through adsorption: Process optimization and assessment

Hong, Seunghee; Lyonga, Fritz Ndumbe; Kang, Jin‐Kyu; Seo, Eun-Jin; Lee, Changgu; Jeong, Sanghyun; Hong, Soon Ho; Park, Seong‐Jik

doi:10.1016/j.chemosphere.2020.126475

Cited by 77 publications

(15 citation statements)

References 87 publications

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“…The efficiency of adsorption processes in the removal of pollutants is often influenced by operating parameters such as pH, sorbent dosage, temperature, contact time, stirring speed and initial concentration. Most of the studies optimized the operating parameters of adsorption without considering the simultaneous interactive impact of two or more operating parameters on the performance of the adsorption process (Al-Ghouti et al 2019;Hong et al 2020). Therefore, this study optimized the operating parameters of the adsorption of Hg 2+ by nitrated PC, which include the initial concentration of Hg 2+ , pH of water, contact time, sorbent dosage, rate of agitation via response surface methodology (RSM) based on a central composite design (CCD).…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

“…Therefore, this study optimized the operating parameters of the adsorption of Hg 2+ by nitrated PC, which include the initial concentration of Hg 2+ , pH of water, contact time, sorbent dosage, rate of agitation via response surface methodology (RSM) based on a central composite design (CCD). Through RSM, an optimized adsorption method can be obtained by considering the interactive impact of operating parameters (Hong et al 2020). The adsorption mechanism of Hg 2+ by nitrated PC was also evaluated through isotherms and kinetic studies.…”

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

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Feasibility of mercury (II) ion removal by nitrated polycarbonate derived from waste optical discs

Abdallah

Tay

Low

2020

Int. J. Environ. Sci. Technol.

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Advanced technology has led to the generation of the massive amount of electrical and electronic wastes, including compact discs and digital versatile discs. These optical discs are often ended up in landfills and incinerators, resulting in severe environmental degradation. This research aims to recover polycarbonate from waste optical discs and exploring its potential as a sorbent for the removal of mercury in water. The recovered polycarbonate was nitrated to enhance its efficiency in removing mercury (II) ion. The nitrated polycarbonate was characterized using Fourier-transform infrared spectroscopy, field emission scanning electron microscopy, thermogravimetric analysis, energy-dispersive X-ray spectroscopy and Brunauer-Emmett-Teller surface area analysis. Response surface methodology was employed to investigate the effects of agitation rate, contact time, pH, initial concentration, sorbent dosage on the mercury (II) ion removal efficiency via a central composite design. According to the quadratic model, an optimum response can be achieved at 188.6 rpm of agitation, 150 min of contact time, pH 7.55 and 1.50 mg/L of initial mercury (II) ion concentration. The adsorption process was found to follow the Freundlich isotherm model, and the adsorption mechanism was found to obey the pseudo-second-order kinetic model that indicates the chemisorption process. The results of this study showed that the nitrated PC with a maximum adsorption capacity of 0.289 mg/g has the potential to be used as a sorbent in water treatment for the removal of mercury (II) ion in water.

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Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Section: Electronic Supplementary Materialsmentioning

confidence: 99%

Feasibility of mercury (II) ion removal by nitrated polycarbonate derived from waste optical discs

Abdallah

Tay

Low

2020

Int. J. Environ. Sci. Technol.

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“…Fe@FWB was prepared as described in our previous study (Hong et al 2020). FW was supplied by a food waste treatment plant located in Seoul, South Korea.…”

Section: Biochar Preparation and Modi Cationmentioning

confidence: 99%

“…After pyrolysis, these inorganic metal salts adhere to the surface of the biochar via the formation of metal oxide nanoparticles, thus improving the adsorption capacity of the biochar (Tan et al 2016). Previous studies have reported that metal-impregnated biochar is effective for anions, such as selenate (Hong et al 2020, Lee et al 2021), uoride (Mei et al 2020, Meilani et al 2021, arsenate (Lyonga et al 2020), chromate (Dong et al 2011), and phosphate (Kang et al 2021). Food waste (FW), separately collected at the household level in Korea, can be used more e ciently for biochar production than sewage sludge with hazardous heavy metals (Hong et al 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Previous studies have reported that metal-impregnated biochar is effective for anions, such as selenate (Hong et al 2020, Lee et al 2021), uoride (Mei et al 2020, Meilani et al 2021, arsenate (Lyonga et al 2020), chromate (Dong et al 2011), and phosphate (Kang et al 2021). Food waste (FW), separately collected at the household level in Korea, can be used more e ciently for biochar production than sewage sludge with hazardous heavy metals (Hong et al 2020). The utilization of the pyrolysis byproduct is an environmentally friendly option because pyrolysis is an effective way to reduce not only the FW and generate combustible gases such as H 2 , CO, and CH 4 (Lee et al 2020).…”

Section: Introductionmentioning

confidence: 99%

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Application of Response Surface Methodology and Artificial Neural Network for The Preparation of Fe-Loaded Biochar for Enhanced Cr(VI) Adsorption and Its Cr(VI) Adsorption Characteristics in an Aqueous Solution

Kang

Seo

Lee

et al. 2022

Preprint

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In this study, we optimized and explored the effect of the conditions for synthesizing Fe-loaded food waste biochar (Fe@FWB) for Cr(VI) removal using the response surface methodology (RSM) and artificial neural network (ANN). The pyrolysis time, temperature, and Fe concentration were selected as the independent variables, and the Cr(VI) adsorption capacity of Fe@FWB was maximized. RSM analysis showed that the p-values of pyrolysis temperature and Fe concentration were less than 0.05, indicating that those variables were statically significant, while pyrolysis time was less significant due to its high p-value (0.2830). However, the ANN model results showed that the effect of pyrolysis time was more significant on Cr(VI) adsorption capacity than Fe concentration. The optimal conditions, determined by the RSM analysis with a lower sum of squared error than ANN analysis, were used to synthesize the optimized Fe@FWB (Fe@FWB-OPT) for Cr(VI) removal. From the equilibrium model fitting, the Langmuir model showed a better fit than the Freundlich model, while the Redlich–Peterson isotherm model overlapped. The Cr(VI) sorption capacity of Fe@FWB-OPT calculated from the Langmuir model was 377.71 mg/g, high enough to be competitive to other adsorbents. The kinetic Cr(VI) adsorption was well described by the pseudo-second-order and Elovich models. The XPS results showed that Cr adsorbed on the surface of Fe-FWB-OPT was present not only as Cr(VI) but also as Cr(III) by the reduction of Cr(VI). The results of Cr(VI) adsorption by varying the pH indicate that electrostatic attraction is a key adsorption mechanism.

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Biological Remediation of Selenium in Soil and Water

Borah

Sen

Sarma³

et al. 2021

Handbook of Assisted and Amendment: Enhanced Sustainable Remediation Technology

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Synthesis of Fe-impregnated biochar from food waste for Selenium(Ⅵ) removal from aqueous solution through adsorption: Process optimization and assessment

Cited by 77 publications

References 87 publications

Feasibility of mercury (II) ion removal by nitrated polycarbonate derived from waste optical discs

Feasibility of mercury (II) ion removal by nitrated polycarbonate derived from waste optical discs

Application of Response Surface Methodology and Artificial Neural Network for The Preparation of Fe-Loaded Biochar for Enhanced Cr(VI) Adsorption and Its Cr(VI) Adsorption Characteristics in an Aqueous Solution

Biological Remediation of Selenium in Soil and Water

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