Biochar as a low-cost adsorbent for aqueous heavy metal removal: A review

Qiu, Bingbing; Tao, Xuedong; Wang, Hao; Li, Wenke; Ding, Xiang; Chu, Huaqiang

doi:10.1016/j.jaap.2021.105081

Cited by 408 publications

(123 citation statements)

References 139 publications

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“…For example, biochar has been commonly used as a soil enhancer, thus making soils more fertile and also sequestering carbon in soils for a long time without greenhouse gas (GHG) emissions [2]. Concerning its porous structure and surface characterization, biochar has high adsorption potential for the removal of pollutants from water streams [3][4][5][6][7]. In recent years, there is an increasing interest in exploiting biochar as an excellent carbon material for environmental applications, or reusing different lignocellulosic feedstocks for producing biochar with high pore properties (e.g., specific surface area), which includes wood [8], oil palm shell [9], maize straw [10], cocoa pod husk [11], rice husk [12] and so on.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Porous Biochar from Soapberry Pericarp at Severe Carbonization Conditions

et al. 2021

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The residue remaining after the water extraction of soapberry pericarp from a biotechnology plant was used to produce a series of biochar products at pyrolytic temperatures (i.e., 400, 500, 600, 700 and 800 °C) for 20 min plant was used to produce a series of biochar products. The effects of the carbonization temperature on the pore and chemical properties were investigated by using N2 adsorption–desorption isotherms, energy dispersive X-ray spectroscopy (EDS) and Fourier-transform infrared spectroscopy (FTIR). The pore properties of the resulting biochar products significantly increased as the carbonization temperature increased from 700 to 800 °C. The biochar prepared at 800 °C yielded the maximal BET surface area of 277 m2/g and total pore volume of 0.153 cm3/g, showing that the percentages of micropores and mesopores were 78% and 22%, respectively. Based on the findings of the EDS and the FTIR, the resulting biochar product may be more hydrophilic because it is rich in functional oxygen-containing groups on the surface. These results suggest that soapberry pericarp can be reused as an excellent precursor for preparing micro-mesoporous biochar products in severe carbonization conditions.

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Section: Introductionmentioning

confidence: 99%

Preparation of Porous Biochar from Soapberry Pericarp at Severe Carbonization Conditions

et al. 2021

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“…Furthermore, Jing et al (2019) have shown that biochar reduces the Pb 2+ and Cd 2+ concentration in surface soils and is effective in the immobilization of these metals in subsoils. This property is a result of the negatively charged surface, which generates an electrostatic attraction (Patra et al, 2017). Soils are also polluted by pesticides, which can also be immobilized through the use of biochar (Liu et al, 2018).…”

Section: Effects Of Biochar On Contaminated Soilsmentioning

confidence: 99%

Use of biochar as a remediation technique for hydrocarbon contaminated soils in Peru

Torrado¹,

López

2021

S. Sust.

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“…Various industrial, agricultural and domestic wastes dumped to water bodies can seriously pollute, and the potential contaminants can cause different diseases such as diarrheal diseases, vector borne diseases, cutaneous diseases, blindness, paralysis, and liver diseases (Chowdhary et al). In general, organic dyes from textile and painting industries [1,3], different drugs from pharmaceuticals [2], inorganic pollutants and polysaccharides from distillery industries [4], smoke and organic [26], biochar [27], chitosan-based adsorbents [28], 3D porous aerogels [29], agricultural and industrial wastes [30], nanomaterials [31], and biosorption [32] have been studied to remove toxic heavy metal contaminants from wastewater. More recently, efficient removal of Cr(VI) from the contaminated solutions has been reported.…”

Section: Introductionmentioning

confidence: 99%

Bioremediation of Chromium by Microorganisms and Its Mechanisms Related to Functional Groups

Ayele

Godeto

2021

Journal of Chemistry

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Heavy metals generated mainly through many anthropogenic processes, and some natural processes have been a great environmental challenge and continued to be the concern of many researchers and environmental scientists. This is mainly due to their highest toxicity even at a minimum concentration as they are nonbiodegradable and can persist in the aquatic and terrestrial environments for long periods. Chromium ions, especially hexavalent ions (Cr(VI)) generated through the different industrial process such as tanneries, metallurgical, petroleum, refractory, oil well drilling, electroplating, mining, textile, pulp and paper industries, are among toxic heavy metal ions, which pose toxic effects to human, plants, microorganisms, and aquatic lives. This review work is aimed at biosorption of hexavalent chromium (Cr(VI)) through microbial biomass, mainly bacteria, fungi, and microalgae, factors influencing the biosorption of chromium by microorganisms and the mechanism involved in the remediation process and the functional groups participated in the uptake of toxic Cr(VI) from contaminated environments by biosorbents. The biosorption process is relatively more advantageous over conventional remediation technique as it is rapid, economical, requires minimal preparatory steps, efficient, needs no toxic chemicals, and allows regeneration of biosorbent at the end of the process. Also, the presence of multiple functional groups in microbial cell surfaces and more active binding sites allow easy uptake and binding of a greater number of toxic heavy metal ions from polluted samples. This could be useful in creating new insights into the development and advancement of future technologies for future research on the bioremediation of toxic heavy metals at the industrial scale.

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Biochar as a low-cost adsorbent for aqueous heavy metal removal: A review

Cited by 408 publications

References 139 publications

Preparation of Porous Biochar from Soapberry Pericarp at Severe Carbonization Conditions

Preparation of Porous Biochar from Soapberry Pericarp at Severe Carbonization Conditions

Use of biochar as a remediation technique for hydrocarbon contaminated soils in Peru

Bioremediation of Chromium by Microorganisms and Its Mechanisms Related to Functional Groups

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