Sorption of ionized dyes on high-salinity microalgal residue derived biochar: Electron acceptor-donor and metal-organic bridging mechanisms

Tan, Xuefei; Zhu, Shishu; Show, Pau Loke; Qi, Haiqun; Ho, Shih‐Hsin

doi:10.1016/j.jhazmat.2020.122435

Cited by 70 publications

(14 citation statements)

References 68 publications

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“…The reduction in Ca 2+ and Mg 2+ ion concentrations in the solution after dye adsorption implied the occurrence of ion exchange processes in all biochars (Pormazar and Dalvand 2020). The formation of ternary complexes by metal-bridging in mineral-rich biochars can ease the sorption dyes on the biochar surface in the presence of Ca 2+ (Tan et al 2020). The positive and significant correlation of Ca 2+ concentration of biochar with Qm also implied the possibility of metal-bridging or cation -π interaction.…”

Section: Mechanism Of Adsorptionmentioning

confidence: 94%

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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Section: Mechanism Of Adsorptionmentioning

confidence: 94%

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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“…Wang et al studied the effects of ash on aromatic compound adsorption and found that ash had an inhibitory effect on the sorption of aromatic compounds . On the other hand, Tan et al used biochar and demineralized biochar for dye adsorption and it revealed that the adsorption of dyes benefited from the presence of inorganic minerals . Zhao et al also investigated the role of minerals in biochars in bisphenol A adsorption .…”

Section: Resultsmentioning

confidence: 99%

A Promising Solution for Food Waste: Preparing Activated Carbons for Phenol Removal from Water Streams

et al. 2021

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Phenol and its derivatives are highly toxic chemicals and are widely used in various industrial applications. Therefore, the industrial wastewater streams must be treated to lower the concentration of phenol before discharge. At the same time, food waste has been a major environmental problem globally and the scientific community is eagerly seeking effective management solutions. The objective of this study was to understand the potential of utilizing food waste as a renewable and sustainable resource for the production of activated carbons for the removal of phenol from water streams. The food waste was pyrolyzed and physically activated by steam. The pyrolysis and activation conditions were optimized to obtain activated carbons with high surface area. The activated carbon with the highest surface area, 745 m 2 g –1 , was derived via activation at 950 °C for 1 h. A detailed characterization of the physicochemical and morphological properties of the activated carbons derived from food waste was performed and a comprehensive adsorption study was conducted to investigate the potential of using the activated carbons for phenol removal from water streams. The effects of pH, contact time, and initial concentration of phenol in water were studied and adsorption models were applied to experimental data to interpret the adsorption process. A remarkable phenol adsorption capacity of 568 mg g –1 was achieved. The results indicated that the pseudo-second-order kinetic model was better over the pseudo-second-order kinetic model to describe the kinetics of adsorption. The intraparticle diffusion model showed multiple regions, suggesting that the intraparticle diffusion was not the sole rate-controlling step of adsorption. The Langmuir isotherm model was the best model out of Freundlich, Temkin, and Dubinin–Radushkevich models to describe the phenol adsorption on activated carbons derived from food waste. This study demonstrated that food waste could be utilized to produce activated carbon and it showed promising capacity on phenol removal.

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“…The textile industry comprises a complex network of processes that constantly exacerbate the use of organic dyes (Haji and Naebe, 2020), which are often improperly released into the environment (Gita et al, 2017;Zafiu et al, 2021) and causes recurrent human health problems (Ding et al, 2011;Kooravand et al, 2021;Naveenraj et al, 2018;Rovira and Domingo, 2019;Tkaczyk et al, 2020;Zhang et al, 2009). In this regard, most textile dyes are potentially toxic, carcinogenic, mutagenic and teratogenic (Carneiro et al, 2010;Tan et al, 2020;Yek et al, 2020). Furthermore, improper dye residue disposal causes soil and groundwater contamination, reducing the water quality for humans and aquatic ecosystems.…”

Section: Introductionmentioning

confidence: 99%

Probing the toxic interactions between the reactive dye Drimaren Red and Human Serum Albumin

Menezes

Assis

Neto

et al. 2021

Preprint

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Azo dyes like Drimaren Red CL-5B (DR, CI Reactive Red 241) represent a class of compounds extensively used in the textile industry and are extremely dangerous to the environment and human health. Therefore, understanding the binding characteristics between such substances and biological macromolecules is essential from a toxic-kinetic perspective. The molecular interaction between DR and Human Serum Albumin (HSA) was investigated through spectroscopic techniques and molecular docking approaches. The results indicate that DR quenches HSA fluorescence following a static mechanism (corroborated by UV-Vis studies) with a moderate interaction (Ka~105 M-1), guided by electrostatic interactions (DS> 0 and DH< 0). DR is 5.52 nm distant from fluorophore residue Trp-214 (according to FRET investigations), and the interaction is mainly related to Tyr residues (as revealed by synchronous fluorescence). The Ellman assay identified a decrease in the content of HSA free thiol. The results of the RLS demonstrate that there are HSA alterations, suggesting damage to the confirmation of the protein. Molecular docking suggests the binding site of DR was located in subdomain IIB HSA, corroborating the experimental properties. Finally, the results suggest a high potential for DR toxicity triggered by contact with key proteins, which affects the biomolecule functionalities.

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Sorption of ionized dyes on high-salinity microalgal residue derived biochar: Electron acceptor-donor and metal-organic bridging mechanisms

Cited by 70 publications

References 68 publications

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

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

A Promising Solution for Food Waste: Preparing Activated Carbons for Phenol Removal from Water Streams

Probing the toxic interactions between the reactive dye Drimaren Red and Human Serum Albumin

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