Effects of modification and magnetization of rice straw derived biochar on adsorption of tetracycline from water

Dai, Jihong; Meng, Xiangfu; Zhang, Yuhu; Huang, Yunjie

doi:10.1016/j.biortech.2020.123455

Cited by 253 publications

(56 citation statements)

References 48 publications

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“…The high BET surface and micropore areas of S800 and S900 suggested a fine porous structure, which is in agreement with SEM results (Refer to SEM images). The Zeta potential rapidly increased with the increase in pyrolysis temperature from 200°C to 500°C ( Table 1 ), as well-carbonized biochar has larger Zeta [ 19 – 21 ].…”

Section: Resultsmentioning

confidence: 99%

“…The nature of feedstock strongly affects the properties of biochars [ 17 , 18 ]. For example, biochar derived from low-cost biomass resources such as grass, reed, and orange peel showed different sorption capacities for dyestuf [ 19 – 21 ]. As maize straw is highly abundant in China, it represents an important feedstock for biomass production [ 22 – 24 ].…”

Section: Introductionmentioning

confidence: 99%

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Surface characterization of maize-straw-derived biochar and their sorption mechanism for Pb2+ and methylene blue

et al. 2020

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Biochar derived from straw is a potential low-cost adsorbent for metal ions and organic pollutants, but its practical application is still limited by the adsorption capacity. In this study, the correlation between the biochar's properties and pyrolysis temperature was explored. The adsorption mechanism was studied by monitoring the changes of biochar properties before and after adsorption using BET, SEM, XPS and FT-IR spectroscopy. The adsorption mechanism was revealed following the adsorption kinetics and the changes in biochar's properties before and after adsorption. The methylene blue (MB) and Pb 2+ adsorption removal efficiency reached 95% at the initial concentration of 125 and 500 mg/L, respectively. Physisorption, chemisorption, and pore filling mechanisms determined the adsorption process of MB and Pb 2+ on biochar. The Pb 2+ adsorption process was highly affected by chemical co-precipitation at higher pyrolysis temperatures. The appearance of tar particles increased the adsorption rate of Pb 2+. The biochar obtained at the pyrolysis temperature at 500, 800 and 900˚C proved to be applicable for Pb 2+ removal. Chemisorption and porosity dominated the MB adsorption, and biochars produced at pyrolysis temperatures of 200, 800 and 900˚C are potential materials for MB removal. This study provides optimal pyrolysis conditions for transforming maize straw into valuable, low-cost materials for the removal of different pollutants.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Surface characterization of maize-straw-derived biochar and their sorption mechanism for Pb2+ and methylene blue

et al. 2020

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“…The interlayer distance of GO was 8.33 Å, which was 2.5 times higher than the interlayer distance of graphite precursor (calculated from Eq.1). This phenomenon might be explained by the insertion of oxygen functional groups in the graphite plate after oxidation [27]. The interlayer distance of rGO was 3.59 Å, which was significantly decreased due to the elimination of various oxygen-containing functional groups after the chemical reduction [28].…”

Section: Characterization Of Materialsmentioning

confidence: 99%

Facile Techniques to Synthesize Reduced Graphene Oxide for Removing Tetracycline From Water: Kinetics and Thermodynamics Studies

Tran¹,

Ha²,

Nguyen

et al. 2021

Preprint

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In this study, reduced graphene oxide (rGO) was successfully produced from graphite precursor by chemical oxidation and exfoliation processes which were followed by a reduction process in mild conditions. rGO was then applied in the adsorption of tetracycline (TC) in water. SEM/EDX, XRD, FT-IR, BET, pHpzc were conducted to characterize the synthesized materials. The adsorption efficiency of TC from water was evaluated by changes in several factors such as contact time, temperature, pH of the solution, adsorbent load, and tetracycline concentration. Furthermore, adsorption kinetics, thermodynamics, and isotherms were also investigated. As the result, the adsorption process of TC onto rGO was spontaneous, endothermic, and governed by both physisorption and chemisorption. The maximum uptake calculated from Langmuir isotherm model was 58.03 mg/g. rGO material could be regenerated by using methanol and diluted NaOH solutions. The findings in this work provides a complete data on the TC adsorption process onto rGO and the process of recovery and reuse of rGO.

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“…The texture of biochar would affect the adsorption capacity of TC on the MCs. Dai et al [47] modified rice straw biochar by an alkali-acid combined magnetization method. The adsorption capacity could reach 98.3 mg g −1 , and the main adsorption mechanisms were the hydrogen bonding and pore filling effect.…”

Section: Biochar-based Mcsmentioning

confidence: 99%

“…Magnetic composites (MCs) (such as magnetic biochar, magnetic nanomaterials, magnetic chitosan, etc.) are broadly utilized in adsorption and AOPs due to their high surface area, porous structure, convenient separation, and recycling [1,[46][47][48]. Transition metal salts, natural iron ores, and iron oxides were commonly used magnetic precursor.…”

Section: Introductionmentioning

confidence: 99%

Application of Magnetic Composites in Removal of Tetracycline through Adsorption and Advanced Oxidation Processes (AOPs): A Review

et al. 2021

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Water pollution induced by the tetracycline (TC) has caused global increasing attention owing to its extensive use, environmental persistence, and potential harm for human health. Adsorption and advanced oxidation processes (AOPs) have been promising techniques for TC removal due to ideal effectiveness and efficiency. Magnetic composites (MCs) which exploit the combined advantages of nano scale, alternative sources, easy preparation, and separation from wastewater are widely used for catalysis and adsorption. Herein, we intensively reviewed the available literature in order to provide comprehensive insight into the applications and mechanisms of MCs for removal of TC by adsorption and AOPs. The synthesis methods of MCs, the TC adsorption, and removal mechanisms are fully discussed. MCs serve as efficient adsorbents and photocatalysts with superior performance of photocatalytic performance in TC degradation. In addition, the TC can be effectively decomposed by the Fenton-based and SO4•− mediated oxidation under catalysis of the reported MCs with excellent catalytic performance. Based on the existing literature, we further discuss the challenge and future perspectives in MCs-based adsorption and AOPs in removing TC.

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Effects of modification and magnetization of rice straw derived biochar on adsorption of tetracycline from water

Cited by 253 publications

References 48 publications

Surface characterization of maize-straw-derived biochar and their sorption mechanism for Pb2+ and methylene blue

Surface characterization of maize-straw-derived biochar and their sorption mechanism for Pb2+ and methylene blue

Facile Techniques to Synthesize Reduced Graphene Oxide for Removing Tetracycline From Water: Kinetics and Thermodynamics Studies

Application of Magnetic Composites in Removal of Tetracycline through Adsorption and Advanced Oxidation Processes (AOPs): A Review

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