An abundant porous biochar material derived from wakame (Undaria pinnatifida) with high adsorption performance for three organic dyes

Yao, Xiaoyuan; Ji, Lili; Guo, Jingjie; Ge, Shaoliang; Lu, Wencheng; Chen, Yingna; Cai, Lu; Wang, Yaning; Song, Wen‐Dong

doi:10.1016/j.biortech.2020.124082

Cited by 141 publications

(36 citation statements)

References 49 publications

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“…Among these approaches, adsorption has become one of the most widely accepted technologies due to its economy, feasibility and environmental-friendliness (Gao et al 2012;Hu et al 2020;Kim et al 2020;Ling et al 2016;Xiao et al 2018). Based on the characteristics of high porosity, hydrophobicity and aromaticity (Peiris et al 2017), biochars (BCs) have attracted extensive attention as an excellent adsorbent for removing organic contaminants (Dai et al 2020;Hopkins and Hawboldt 2020;Ndoun et al 2020;Tan et al 2015;Yao et al 2020). BCs are the pyrolysis products of biomasses at low temperatures (< 800 °C) in the oxygen-limited environment (Tripathi et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Impacts of temperatures and phosphoric-acid modification to the physicochemical properties of biochar for excellent sulfadiazine adsorption

Zeng

Wang²,

et al. 2022

Biochar

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The textural properties and surface chemistry of phosphoric acid-modified biochars (PABCs) prepared at different pyrolysis temperatures (500–700 °C) were studied based on the results obtained from XRD, SEM, BET, FT-IR, Raman, XPS and elements analyses. PABCs prepared at higher temperatures tended to possess a bigger proportion of microporous structure. The adsorption capacity and initial rate of PABCs for sulfadiazine (SDZ) were notably improved to 139.2 mg/g and 9.66 mg/(g min) as calculated from the Langmuir model. The adsorption equilibrium time was only one quarter of that without modification. The H3PO4 modification was advantageous to produce phosphate and break functional groups to form disordered carbon structure abundant of micropores. The enhancement in the adsorption of SDZ was due to the confinement effect of hydrophobic cavities from the mircoporous structure and the π–π electron–donor–acceptor interaction. Specially, PABCs exhibited stable adsorption capacities at a wide pH range (3.0–9.0) or relatively high concentrations of coexisting ions.

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Section: Introductionmentioning

confidence: 99%

Impacts of temperatures and phosphoric-acid modification to the physicochemical properties of biochar for excellent sulfadiazine adsorption

Zeng

Wang²,

et al. 2022

Biochar

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“…Nowadays, biochar (BC) is considered a good candidate for adsorbent due to its porosity, high surface area, and cost-effectiveness along with several environmental applications (Zhang et al 2021). Biochars prepared from maple leaf (Choi et al 2020), tannery sludge (Zhai et al 2020) and wakame (Undaria pinnatifida) (Yao et al 2020) have been reported for the removal of various anionic dyes from aqueous system. Due to the repulsive nature of the dye with anionic surface functionalities (COOH, OH) of biochars, surface modified biochar such as cationic surfactant modified coffee husk (Kosaiyakanon and Kungsanant 2020) and Cetyltrimethyl ammonium bromide modified magnetic biochar (Wang et al 2020) were also tried for the removal of anionic dye.…”

Section: Introductionmentioning

confidence: 99%

Comparative assessment for removal of anionic dye from water by different waste-derived biochar vis a vis reusability of generated sludge

Singh

Ahsan

Pandey

et al. 2022

Biochar

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In this study, four biochars prepared from different crop residue waste i.e. sugarcane bagasse (SBB), coconut shell (CNB), paddy straw (PDB), and distilled waste of lemongrass (LGB) were evaluated for removal of Remazol Brilliant Blue R from the aqueous system. The RBBR adsorption capacities of biochar were 97–79% for SBB, 99.9–99.47% for CNB, 66.1–48% for PDB, and 78–68% for LGB, dominantly controlled by their aromaticity and mineral content. The Langmuir and Freundlich isotherms and pseudo-second-order kinetic models have described the chemisorption of RBBR on biochar surfaces. The thermodynamic data suggested that adsorption was spontaneous and endothermic. These biochars demonstrated excellent reusability (till four cycles with 50–61% regeneration). The purified water and biochar dye sludge demonstrated no phytotoxicity. The findings obtained in this study may provide supports for the potential of biochars for anionic dye removal from water and utilization of generated sludge for zero waste-producing technologies in the future.

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“…Concentration of dye/biochar, temperature and solution pH play important roles in determining the efficiency of biochar [90][91][92][93][94][95]. Nickel modified biochar was capable of adsorbing methylene blue with an adsorption capacity of 479.49 mg/g at 20 • C from wastewater [96]. Initially when the concentration of methylene blue was low, the adsorption by biochar was high due to the large number of active sites still available on the biochar for adsorption.…”

Section: Effect Of Operational Parameters On the Adsorption Of Dyes Bmentioning

confidence: 99%

“…Initially when the concentration of methylene blue was low, the adsorption by biochar was high due to the large number of active sites still available on the biochar for adsorption. Competitive adsorption was found to hinder the efficiency of adsorption of methylene blue by the biochar [96]. Research on the adsorption and degradation of acid red dye revealed that increase in temperature of the solution increased the rate of decolorization [97].…”

Section: Effect Of Operational Parameters On the Adsorption Of Dyes Bmentioning

confidence: 99%

“…Removal of MGD, MBD, and Rhodamine B dye (RBD) using biochar was examined and it was found that the intramolecular diffusion process, involved in adsorption, is rate-limiting [96]. The first step is fast, getting progressively slower due to the reduced adsorption intensity and decrease of unoccupied active sorption sites on biochar surface.…”

Section: Mechanisms Of Dyes Adsorption Onto Biocharmentioning

confidence: 99%

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Biochar as an Eco-Friendly and Economical Adsorbent for the Removal of Colorants (Dyes) from Aqueous Environment: A Review

Srivatsav¹,

Bhargav²,

Shanmugasundaram³

et al. 2020

Water

177

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Dyes (colorants) are used in many industrial applications, and effluents of several industries contain toxic dyes. Dyes exhibit toxicity to humans, aquatic organisms, and the environment. Therefore, dyes containing wastewater must be properly treated before discharging to the surrounding water bodies. Among several water treatment technologies, adsorption is the most preferred technique to sequester dyes from water bodies. Many studies have reported the removal of dyes from wastewater using biochar produced from different biomass, e.g., algae and plant biomass, forest, and domestic residues, animal waste, sewage sludge, etc. The aim of this review is to provide an overview of the application of biochar as an eco-friendly and economical adsorbent to remove toxic colorants (dyes) from the aqueous environment. This review highlights the routes of biochar production, such as hydrothermal carbonization, pyrolysis, and hydrothermal liquefaction. Biochar as an adsorbent possesses numerous advantages, such as being eco-friendly, low-cost, and easy to use; various precursors are available in abundance to be converted into biochar, it also has recyclability potential and higher adsorption capacity than other conventional adsorbents. From the literature review, it is clear that biochar is a vital candidate for removal of dyes from wastewater with adsorption capacity of above 80%.

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An abundant porous biochar material derived from wakame (Undaria pinnatifida) with high adsorption performance for three organic dyes

Cited by 141 publications

References 49 publications

Impacts of temperatures and phosphoric-acid modification to the physicochemical properties of biochar for excellent sulfadiazine adsorption

Impacts of temperatures and phosphoric-acid modification to the physicochemical properties of biochar for excellent sulfadiazine adsorption

Comparative assessment for removal of anionic dye from water by different waste-derived biochar vis a vis reusability of generated sludge

Biochar as an Eco-Friendly and Economical Adsorbent for the Removal of Colorants (Dyes) from Aqueous Environment: A Review

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