Halloysite and coconut shell biochar magnetic composites for the sorption of Pb(II) in wastewater: Synthesis, characterization and mechanism investigation

Wang, Shenwan; Xiao, Dao; Zheng, Xiaoyan; Zheng, Lili; Yang, Yang; Zhang, Haide; Ai, Binling; Sheng, Zhanwu

doi:10.1016/j.jece.2021.106865

Cited by 26 publications

(8 citation statements)

References 52 publications

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“…There was a steady decrease in the removal percentages remaining just above 80% even after 5 cycles, speculated to be due to the replacement of small anions like OH or CO 3 2− for phosphate ions. Similar promising results were shown by halloysite and coconut shell co-pyrolyzed char even after four cycles of lead adsorption-desorption with removal rates greater than 95% [90] One study considered the removal of norfloxacin using hematite-biochar composites (FOC) and pyrite-biochar composites (FSC) by conducting five cycles of adsorption and desorption using methanol as the eluent [72]. The results demonstrated a constant decrease in the pollutant removal plateauing at 75% for FOC and 83% for FSC after several cycles.…”

Section: Kinetic Model Descriptionsupporting

confidence: 78%

Section: Adsorption Studies Using Co-pyrolyzed Charssupporting

confidence: 67%

“…The first one studied co-pyrolyzed char for the removal of arsenic, achieving a maximum adsorption capacity of 4.23 mg/g and removal efficiency of 84.57%, which was obtained at an initial pH of 2 [89]. The second study, using halloysite and coconut shell co-pyrolyzed char, showed optimal lead adsorption at pH 5 [90]. Furthermore, a further study revealed good adsorption results for cadmium at a higher pH using a thiourea modified poplar biochar [91].…”

Section: Effect Of Phmentioning

confidence: 99%

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A review of prospects and current scenarios of biomass co-pyrolysis for water treatment

Zuhara

Mackey

Al‐Ansari

et al. 2022

Biomass Conv. Bioref.

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With ever-growing population comes an increase in waste and wastewater generated. There is ongoing research to not only reduce the waste but also to increase its value commercially. One method is pyrolysis, a process that converts wastes, at temperatures usually above 300 °C in a pyrolysis unit, to carbon-rich biochars among with other useful products. These chars are known to be beneficial as they can be used for water treatment applications; certain studies also reveal improvements in the biochar quality especially on the surface area and pore volume by imparting thermal and chemical activation methods, which eventually improves the uptake of pollutants during the removal of inorganic and organic contaminants in water. Research based on single waste valorisation into biochar applications for water treatment has been extended and applied to the pyrolysis of two or more feedstocks, termed co-pyrolysis, and its implementation for water treatment. The co-pyrolysis research mainly covers activation, applications, predictive calculations, and modelling studies, including isotherm, kinetic, and thermodynamic adsorption analyses. This paper focuses on the copyrolysis biochar production studies for activated adsorbents, adsorption mechanisms, pollutant removal capacities, regeneration, and real water treatment studies to understand the implementation of these co-pyrolyzed chars in water treatment applications. Finally, some prospects to identify the future progress and opportunities in this area of research are also described. This review provides a way to manage solid waste in a sustainable manner, while developing materials that can be utilized for water treatment, providing a double target approach to pollution management.

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Section: Kinetic Model Descriptionsupporting

confidence: 78%

Section: Adsorption Studies Using Co-pyrolyzed Charssupporting

confidence: 67%

Section: Effect Of Phmentioning

confidence: 99%

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A review of prospects and current scenarios of biomass co-pyrolysis for water treatment

Zuhara

Mackey

Al‐Ansari

et al. 2022

Biomass Conv. Bioref.

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“…Los adsorbentes magnéticos que fueron preparados demostraron una buena perspectiva de aplicación para el tratamiento de Pb (II) que se encuentran en las aguas residuales, con lo que se tienen nuevas alternativas para el reciclaje y la utilización de los residuos. (Wang et al 2021).…”

Section: Cáscara De Cocounclassified

Capacidad de adsorción de desechos agroindustriales para remover contaminantes de aguas residuales

Paccha Rufasto,

Paccha Huamani

2023

Rev. Inst. investig. Fac. minas metal cienc. geogr

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La reutilización de residuos como parte de la economía circular será una tendencia importante en los próximos años. Los residuos agroindustriales se encuentran entre los insumos de biomasa de más bajo costo, en la actualidad son los más aplicados para la eliminación de contaminantes en aguas residuales. El objetivo de este trabajo es analizar comparativamente y describir la capacidad de adsorción que tienen las cáscaras provenientes de desechos agroindustriales para remover contaminantes en las aguas residuales, para lo cual se emplearon técnicas de preparación como biosorbente no modificado, biosorbente premodificado, biosorbente modificado químicamente y biosorbente modificado físicamente. En los resultados se observó que la cáscara de naranja, coco, arroz y castaña tienen una elevada capacidad de adsorción de los carbones obtenidos a través de residuos agroindustriales para la adsorción de metales pesados, tintes, pesticidas y otros contaminantes. Los contaminantes adsorbidos mediante estos carbonos son metales y tintes. En conclusión, podemos inferir que los residuos agroindustriales tienen un alto potencial de reutilización, para la adsorción de contaminantes.

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“…41 Apart from numerous uses, there is a gap in the use of this biochar generated from leftover coconut shells for the removal of ions from factory fluids that contain heavy metals, despite India being number two for coconut production in the world, as evidenced by the numerous studies that have been conducted in the past. 42–44 These studies demonstrate that many have looked into the pyrolysis of waste green coconut shells and their use, as well as the obtained biochar, in various ways. As an additional adsorbent for the variety of heavy metals that regularly affect the ecology, coconut biochar should be employed.…”

Section: Introductionmentioning

confidence: 99%

Excellent Cr(vi) adsorbent made from pyrolyzed green coconut trash with parametric modelling and optimization using RSM and experimental data

et al. 2023

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Halloysite and coconut shell biochar magnetic composites for the sorption of Pb(II) in wastewater: Synthesis, characterization and mechanism investigation

Cited by 26 publications

References 52 publications

A review of prospects and current scenarios of biomass co-pyrolysis for water treatment

A review of prospects and current scenarios of biomass co-pyrolysis for water treatment

Capacidad de adsorción de desechos agroindustriales para remover contaminantes de aguas residuales

Excellent Cr(vi) adsorbent made from pyrolyzed green coconut trash with parametric modelling and optimization using RSM and experimental data

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