Preparation of biochar by mango peel and its adsorption characteristics of Cd(<scp>ii</scp>) in solution

Zhang, Liming; Ren, Yanfang; Xue, Yuhao; Zhi-wen, Cui; Wei, Qihang; Han, Chuan Hsiao; He, Junyu

doi:10.1039/d0ra06586b

Cited by 37 publications

(14 citation statements)

References 72 publications

(74 reference statements)

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“…Furthermore, the elemental analysis results also confirmed that the C content was increased (Table S1) but that the contents of O, H, and N were decreased in the C1000 sample compared to that in the C600 sample. This suggests the removal of the remaining volatile components on the surface (functional group elements of H, N, and O) at a high carbonization temperature, which is consistent with earlier reports. , …”

Section: Resultssupporting

confidence: 92%

“…This suggests the removal of the remaining volatile components on the surface (functional group elements of H, N, and O) at a high carbonization temperature, which is consistent with earlier reports. 24,25 Figure 2a shows the XRD patterns of the MP and MPderived carbon (C600 and C1000) samples. The broad diffraction peaks at approximately 23 and 43°were assigned to the (002) and (100) planes of graphitic carbon.…”

Section: Resultsmentioning

confidence: 99%

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Biomass Feedstock of Waste Mango-Peel-Derived Porous Hard Carbon for Sustainable High-Performance Lithium-Ion Energy Storage Devices

et al. 2021

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Sustainable electrical energy storage devices are an effective solution for the fossil fuel-based electrical power systems and aid in abating the environmental pollution. In this study, we design a sustainable and green approach for producing hard carbon from the biomass feedstock of waste mango peels through a simple carbonization route at low and high temperatures, namely, 600 °C (C600) and 1000 °C (C1000), respectively. The resultant hard carbon is used as an anode for lithium-ion batteries. The sample prepared at higher temperature exhibits a higher reversible cyclic capacity and rate capability than the sample prepared at low temperature. The C1000 sample delivers a reversible discharge capacity of 801 mA h g–1 at 100 mA g–1 and sustains a discharge capacity of 628 mA h g–1 over 200 cycles. The hard carbon electrode cell has a high capacitive charge and stable plateau capacity, indicating that the performance of the C1000 cell is good. Moreover, the higher specific surface area and hierarchical porous structure provide more Li-ion active sites, faster diffusion kinetics, and higher electronic conductivity during the charge/discharge process. The hard carbon derived from mango peels is a potential candidate for use in advanced large-scale energy storage applications. Specifically, this work presents a sustainable approach to achieve eco-friendly and cost-effective waste biomass management for energy applications.

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Section: Resultssupporting

confidence: 92%

Section: Resultsmentioning

confidence: 99%

Biomass Feedstock of Waste Mango-Peel-Derived Porous Hard Carbon for Sustainable High-Performance Lithium-Ion Energy Storage Devices

et al. 2021

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“…The wide peak between 1390 and 1600 cm −1 related with C = C decreased with increasing Cd adsorption. These findings are in accordance with the different biochar studies reported in the literature [40,[88][89][90][91]. Combined with all results and compared with literature, the proposed mechanism for Cd 2+ adsorption by BC900 includes ion exchange (Cd 2+ + CaSO 4 CdSO 4 + Ca 2+ ), chemical precipitation (Cd 2+ + CO 3 2− CdCO 3 ), and complexation reaction of Cd 2+ with oxygen-containing functional groups (Cd 2 O(OH) 2 ); Cd-COOH).…”

Section: Adsorbate-adsorbent Interactionssupporting

confidence: 93%

Evaluation of characteristics of raw tea waste-derived adsorbents for removal of metals from aqueous medium

Ateş

Mert

Timko

2021

Biomass Conv. Bioref.

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Chemical modification and microwave activation are cost-effective and eco-friendly engineering methods to improve biochar's physicochemical and adsorption performance. Therefore, a series of biochars samples was produced by pyrolysis at 500 °C in the presence of phosphoric acid (H 3 PO 4 ) without and with microwave (MW) irradiation of the raw tea waste (RTW). Effect of acid and MW activation on the characteristics of biochar was compared with biochars produced from pyrolysis of RTW at 300, 500, 700, and 900 °C. Pyrolysis in the presence of H 3 PO 4 promoted the formation of oxygen-containing functional groups and increased the surface area of the biochar product (931 m 2 g -1 compared with 13.6 m 2 g -1 ). Compared with biochars obtained from acid-assisted pyrolysis, MW activation nearly doubled the measured surface area (1763 m 2 g -1 ) by the formation of a micropore structure and required seconds instead of hours to perform. Heavy metal adsorption capacities observed for the acid-activated chars were comparable to biochar samples produced in the temperature range of 500-900 °C, but acid-promoted activation required much lower temperatures, and the effects of activation depended on the metal, the solution pH, and the activation treatment. Specifically, acid promotion increased Cu and Cd sorption capacity, attributable to the increased surface area and increased surface densities of oxygen functional groups (C = O and OH). The results of ternary-metal adsorption results demonstrated the competitive adsorption between three metals, and the affinity sequence of biochar produced at 900 °C (BC900) was found as Pb(II) > Cd(II) > Cu(II). However, the metal affinity sequence of BC900 to single metal is Pb(II) > Cu(II) > Cd(II). FTIR and SEM-EDS results revealed that Pb(II) had the same adsorption sites with Cu(II), but Pb(II) has a greater affinity than Cu(II). Kinetic measurements and spectroscopic analysis indicated that Pb, Cu, and Cd form chemical complexes on the surface. These results provide new insight on the utilization of tea wastes for heavy metal removal from aqueous streams.

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“…Several studies have explored the removal of Cd 2+ by biochar in aqueous solutions. [10][11][12] Furthermore, to increase the biochar adsorption capacity for heavy metals, modication with chemical reagents, such as acid, bases, and KMnO 4 , has been widely used to prepare activated carbon. The ability of activated carbon as an adsorbent is caused by the increased surface area, changed porous structure, and improved surface functional groups and their amount on the carbon surface.…”

Section: Introductionmentioning

confidence: 99%

Characterization of pruned tea branch biochar and the mechanisms underlying its adsorption for cadmium in aqueous solution

et al. 2021

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Preparation of biochar by mango peel and its adsorption characteristics of Cd(ii) in solution

Abstract: Biochars were prepared by pyrolyzing mango peel waste at 300, 400, 500, 600 and 700 °C.

Cited by 37 publications

References 72 publications

Biomass Feedstock of Waste Mango-Peel-Derived Porous Hard Carbon for Sustainable High-Performance Lithium-Ion Energy Storage Devices

Biomass Feedstock of Waste Mango-Peel-Derived Porous Hard Carbon for Sustainable High-Performance Lithium-Ion Energy Storage Devices

Evaluation of characteristics of raw tea waste-derived adsorbents for removal of metals from aqueous medium

Characterization of pruned tea branch biochar and the mechanisms underlying its adsorption for cadmium in aqueous solution

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