Quaternary ammonium-functionalized rice straw hydrochar as efficient adsorbents for methyl orange removal from aqueous solution

Peng, Xiong; Yan, Zongcheng; Cheng, Xi Quan; Li, Yu; Wang, Aili; Chen, Li

doi:10.1007/s10098-019-01703-2

Cited by 25 publications

(5 citation statements)

References 44 publications

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“…Typical functional groups on hydrochar can be optimized for increasing their adsorptive capacity or removing selective contaminants. It can be effectively achieved by altering physicochemical properties with additional activation steps (Peng et al, 2019;Teng et al, 2020;Çatlıoğlu et al, 2020;Mittapalli et al, 2021).…”

Section: Hydrochar and Water Qualitymentioning

confidence: 99%

Hydrochar: A Promising Step Towards Achieving a Circular Economy and Sustainable Development Goals

et al. 2022

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The United Nations 17 Sustainable Development Goals (SDGs) are a universal call to action to end poverty, protect the environment, and improve the lives and prospects of everyone on this planet. However, progress on SDGs is currently lagging behind its 2030 target. The availability of water of adequate quality and quantity is considered as one of the most significant challenges in reaching that target. The concept of the ‘Circular Economy’ has been termed as a potential solution to fasten the rate of progress in achieving SDGs. One of the promising engineering solutions with applications in water treatment and promoting the concept of the circular economy is hydrochar. Compared to biochar, hydrochar research is still in its infancy in terms of optimization of production processes, custom design for specific applications, and knowledge of its water treatment potential. In this context, this paper critically reviews the role of hydrochar in contributing to achieving the SDGs and promoting a circular economy through water treatment and incorporating a waste-to-value approach. Additionally, key knowledge gaps in the production and utilization of engineered hydrochar are identified, and possible strategies are suggested to further enhance its water remediation potential and circular economy in the context of better natural resource management using hydrochar. Research on converting different waste biomass to valuable hydrochar based products need further development and optimization of parameters to fulfil its potential. Critical knowledge gaps also exist in the area of utilizing hydrochar for large-scale drinking water treatment to address SDG-6.

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Section: Hydrochar and Water Qualitymentioning

confidence: 99%

Hydrochar: A Promising Step Towards Achieving a Circular Economy and Sustainable Development Goals

et al. 2022

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“…As the initial concentration of Cr (VI) increased, the adsorption rate declined and it took about 480 min to reach adsorption equilibrium. The adsorption data were explained by pseudo first-order and pseudo second-order kinetic models [18,40], and the corresponding kinetics parameters are listed in Table 2. The pseudo second-order kinetic model matched the experimental data better (R 2 > 0.99), inferring that the adsorption process of Cr (VI) on MPS obeyed the pseudo second-order kinetic model and the entire removal process was controlled by the steps of surface adsorption.…”

Section: Adsorption Kineticsmentioning

confidence: 99%

“…Electrostatic attraction is crucial for Cr (VI) adsorption, and increasing the positive charge density on the cellulose surface is an effective method to enhance Cr (VI) removal efficiency. At present, a variety of nitrogen-containing groups have been used to modify cellulose to increase its surface positive charge density, such as the amine group [16], quaternary ammonium [17,18], and imidazolium [19]. Unfortunately, the competitive adsorption of co-existing ions interfered with Cr (VI) adsorption on most nitrogen-containing cellulose materials, thus leading to reduced adsorption efficiency and selectivity.…”

Section: Introductionmentioning

confidence: 99%

Selective Removal of Hexavalent Chromium by Novel Nitrogen and Sulfur Containing Cellulose Composite: Role of Counter Anions

et al. 2022

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Exploiting an adsorbent with superb selectivity is of utmost importance for the remediation of Cr (VI)-laden wastewater. In this work, a novel nitrogen and sulfur functionalized 3D macroporous cellulose material (MPS) was prepared by homogeneous cross-link cellulose and polyvinylimidazole, followed by ion exchange with MoS42−. MPS exhibited high removal efficiency at a broad pH range (1.0–8.0) and large adsorption capacity (379.78 mg/g) toward Cr (VI). Particularly, outstanding selectivity with an enormous partition coefficient (1.01 × 107 mL/g) was achieved on MPS. Replacing MoS42− with Cl− and MoO42− led to a sharp decline in adsorption selectivity, demonstrating that MoS42− contributed substantially to the selectivity. Results of FTIR, XPS, and apparent kinetic analysis revealed that Cr (VI) was first pre-enriched on the MPS surface via electrostatic and dispersion forces, and then reacted with MoS42− to generate Cr (III), which deposited on MPS by forming Cr(OH)3 and chromium(III) sulfide. This study provides a new idea for designing adsorbents with a superior selectivity for removing Cr (VI) from sewage.

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“…HC is a product of the biomass hydrolysis reactions that occur in the HTC process; the surface of HC contains various chemically reactive functional groups, including acidic functional groups, which can promote the adsorption of pollutants through electrostatic interactions [ 3 ]. However, HC is produced with a low surface area when HTC is used as the sole manufacturing process; therefore, it may be necessary to combine HTC with additional activation steps to effectively change the physicochemical properties, optimize the specific functional groups, and increase the porosity and surface area of HC to increase the adsorption capacity or selective removal of pollutants [ 4 , 5 , 6 , 7 , 8 , 9 ].…”

Section: Introductionmentioning

confidence: 99%

Key Role of Corncob Based-Hydrochar (HC) in the Enhancement of Visible Light Photocatalytic Degradation of 2,4-Dichlorophenoxyacetic Acid Using a Derivative of ZnBi-Layered Double Hydroxides

Tuong Vy,

Nha Khanh,

Nghia

et al. 2023

Materials

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A superior heterojunction of HC-ZnBi-LDO was synthesized in two steps, namely hydrothermal carbonization, followed by co-precipitation. The 2% HC-ZnBi-LDO heterojunction photocatalysts could degrade over 90.8% of 30 mg/L 2,4-dichlorophenoxyacetic acid (2,4-D) using 1.0 g/L of the catalyst after 135 min of visible light exposure at pH 4. The activity of 2% HC-ZnO-LDO was remarkably stable. Approximately 86.4–90.8% of 30 mg/L 2,4-D was degraded, and more than 79–86.4% of TOC was mineralized by 2% HC-ZnBi-LDO at pH 4 after 135 min of visible light exposure during four consecutive cycles. The rapid separation and migration of charge carriers at the interfaces between HC and ZnBi-LDO were achieved within 2% HC-ZnBi-LDO. Moreover, the electron acceptor characteristic of HC in 2% HC-ZnBi-LDO caused the recombination of charge carriers to decrease significantly, thus generating more reactive radicals, such as hydroxyl radicals (OH●) and superoxide radicals (O2●−). These results demonstrate that the novel 2% HC-ZnBi-LDO is a superior photocatalyst for the remediation of hazardous organic pollutants.

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Quaternary ammonium-functionalized rice straw hydrochar as efficient adsorbents for methyl orange removal from aqueous solution

Cited by 25 publications

References 44 publications

Hydrochar: A Promising Step Towards Achieving a Circular Economy and Sustainable Development Goals

Hydrochar: A Promising Step Towards Achieving a Circular Economy and Sustainable Development Goals

Selective Removal of Hexavalent Chromium by Novel Nitrogen and Sulfur Containing Cellulose Composite: Role of Counter Anions

Key Role of Corncob Based-Hydrochar (HC) in the Enhancement of Visible Light Photocatalytic Degradation of 2,4-Dichlorophenoxyacetic Acid Using a Derivative of ZnBi-Layered Double Hydroxides

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