Adsorptive removal of organic pollutant methylene blue using polysaccharide-based composite hydrogels

Sivakumar, R.; Lee, Nae Yoon

doi:10.1016/j.chemosphere.2021.131890

Cited by 90 publications

(35 citation statements)

References 108 publications

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“…Khan et al, using free-radical polymerization, synthesized green hydrogel nanocomposite which can be used as adsorbent [55]. Sivakumar et Lee removed the organic pollutant, methylene blue, from wastewater using polysaccharide-based composite hydrogels as adsorbents [56]. Due to their unique properties, graphene composites with hydrogel have attracted great interest.…”

Section: Graphene Hydrogel Composites As Adsorbents For Dye Pollutantsmentioning

confidence: 99%

Purification of Contaminated Wastewater With the Help of Graphene Composites With Hydrogels

Eraković

Stefanović

2022

FU Work Liv Env Prot

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Lack of clean water requires the use of new wastewater treatment technologies. Adsorption is a simple and effective method for removing contaminants from contaminated water. Graphene composites with hydrogels have found application in wastewater treatment because they have unique properties such as porous structure, unique morphology, good rheological properties, non-toxicity, etc. The paper presents a literature overview of potential solutions to wastewater treatment using composite graphene and graphene oxide with hydrogel-like adsorbents. The mentioned composite compounds have been used in the treatment or elimination of various hazardous substances. In this work, we have investigated the possible adsorption of different classes of colored pollutants (paints) and pesticides (both organic and inorganic).

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Section: Graphene Hydrogel Composites As Adsorbents For Dye Pollutantsmentioning

confidence: 99%

Purification of Contaminated Wastewater With the Help of Graphene Composites With Hydrogels

Eraković

Stefanović

2022

FU Work Liv Env Prot

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“…However, activated carbon is high-cost to employ and recycle, which is unfit to apply on a wide scale. [29,33,41,42] The materials of M41S family were first found by scientists of Mobil Oil in 1992. [43] These mesoporous molecular sieves have the characteristics of uniform mesoporous, large specific surface area, abundant pore structure, and are not hard to operate and to regenerate, which are superior alternative adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Fly‐Ash‐Based Hierarchical MCM‐41 Molecular Sieve as an Efficient Adsorbent for Methylene Blue Removal from Wastewater over a Wide pH

et al. 2022

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The development of cost-effective adsorbents with high sorption capacity and excellent renewability over a wide range of pH is essential for removal of toxic methylene blue (MB) from wastewater. The micro-mesoporous MCM-41 molecular sieve (M-MCM-41) was prepared by coal fly ash (CFA). The low temperature N 2 physical adsorption reveals that the prepared M-MCM-41 has hierarchically micro-mesoporous structure with high surface area (909.5 m 2 ⋅g À 1 ). As a result, M-MCM-41 possesses superior adsorption presentation towards MB with prominently high sorption capacity of 574.7 mg⋅g À 1 , and rapid sorption rate of 0.29 g⋅mg À 1 ⋅h À 1 (13 fold that of CFA). Surprisingly, 95 % of the incipient adsorption capacity remains well after five cycles. More importantly, the M-MCM-41 maintains almost the same maximum sorption capacity in the pH range of 5-9, which is close to the wastewater discharge standard (6 ∼ 9) without excessive pH adjustment. The adsorption kinetics and equilibrium data fit well with pseudo-secondorder model and the Langmuir isotherm model, respectively. And the thermodynamic investigations show that the adsorption behavior is spontaneous and exothermic. The M-MCM-41 has well-defined micro-mesoporous porosity and could be used as an effective adsorbent to remove MB from wastewater. This work provides a new sight for the solid waste resource utilization, which is beneficial to the development of recycling economy.

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“…Accordingly, upon consideration of environmental protection, human health, and sustainable development, dyes have to be adequately removed and must not be released into the aquatic environment. Unfortunately, however, dyes are also recalcitrant materials in biological wastewater treatment [14,15]. For that reason, people have tried to eliminate methylene blue from wastewater via diverse approaches, such as membrane filtration, adsorption, and oxidation processes [16].…”

Section: Introductionmentioning

confidence: 99%

“…Among several AOPs, such as Fenton-, UV-, ozone-, and cold plasma (CP)-based AOPs, CP treatment is known to offer strengths such as higher oxidation potential, lower energy consumption, and shorter treatment time at room temperature and atmospheric pressure independently of the content of organic foulants, pH, and turbidity, unlike other AOPs [29][30][31]. The higher oxidation potential stems from reactive oxidizing species, including several radicals, such as O 2 •, OH•, HO 2 •, or their recombination [15,32], capable of non-selectively oxidizing various materials [33,34], which is also expected to be effective in degrading methylene blue, as shown in Figure 1. Moreover, CP treatment can be applied to the existing infrastructure without installing additional reactors.…”

Section: Introductionmentioning

confidence: 99%

Zero Discharge of Dyes and Regeneration of a Washing Solution in Membrane-Based Dye Removal by Cold Plasma Treatment

et al. 2022

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Although dye removal from wastewater streams has been investigated via several approaches using adsorbents, resins, or membranes, it is still hard to avoid the fact that dyes are persistently left in the adsorption materials or washing solutions used to regenerate the used adsorbents. In particular, given that cleaning agents are composed of acid/base, organic solvents, or electrolytes, dye adsorption and adsorbent regeneration processes leave behind more hard-to-manage wastewater containing dyes. In this study, we demonstrated that cold plasma (CP) treatment, which is one of the advanced oxidation processes (AOPs), can be used for zero discharge of dyes and regeneration of a washing solution in a membrane-based dye removal process. Specifically, CP treatment was found to successfully remove dyes released from a washing process to regenerate a used membrane, thereby effectively recycling a cleaning solution. As a result, the regenerated washing solution was more favorable for the adsorbed dyes’ elution, leading to the successful regeneration of a used membrane without a significant loss of dye removal efficiency. This fact was evidenced by a comparative study on the effect of CP treatment on the reusability of membranes and washing solutions and the kinetic analysis of the AOP of the desorbed dyes. We hope that this study contributes to opening a new door for environmentally friendly and sustainable dye removal.

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Adsorptive removal of organic pollutant methylene blue using polysaccharide-based composite hydrogels

Cited by 90 publications

References 108 publications

Purification of Contaminated Wastewater With the Help of Graphene Composites With Hydrogels

Purification of Contaminated Wastewater With the Help of Graphene Composites With Hydrogels

Fly‐Ash‐Based Hierarchical MCM‐41 Molecular Sieve as an Efficient Adsorbent for Methylene Blue Removal from Wastewater over a Wide pH

Zero Discharge of Dyes and Regeneration of a Washing Solution in Membrane-Based Dye Removal by Cold Plasma Treatment

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