Magnetic BEA-type zeolites: preparation by dry-gel conversion method and assessment of dye removal performance

Phouthavong, Vanpaseuth; Hiraiwa, Masatake; Hagio, Takeshi; Nijpanich, Supinya; Chounlamany, Vanseng; Nishihama, Tatsuo; Kamimoto, Yuki; Ichino, Ryoichi

doi:10.1007/s10163-020-00994-8

Cited by 7 publications

(4 citation statements)

References 37 publications

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“…Another advancement of magnetic zeolite synthesis is the utilization of the dry-gel conversion (DGC) method, first presented by Phouthavong et al [ 31 ]. Some researchers have already introduced this technique, which crystallizes a precursor gel under heated vapor to synthesize well-crystallized non-magnetic zeolites [ 247 , 248 ].…”

Section: Recent Advancements In Synthesis Methods Of Magnetic Adsorbentsmentioning

confidence: 99%

“…Since then, the synthesis of magnetic adsorbents has drawn considerable attention, as indicated by the growing number of publications. Diverse effective adsorbents have been reported to incorporate magnetic particles, such as metal oxides [ 26 , 27 ], silica-based materials [ 28 , 29 , 30 , 31 , 32 ], carbon-based materials [ 33 , 34 , 35 ], graphene oxide [ 36 ], biopolymers, such as lignin [ 37 ], cellulose [ 38 ], chitosan [ 39 ], synthetic polymers [ 40 , 41 , 42 ], molecularly imprinted polymers [ 43 ], metal organic frameworks [ 44 ], and biowaste [ 45 , 46 ]. Magnetic adsorbents can be prepared using physical methods, such as mechanical agitation (stirring, vibration, milling, and ultrasonication) at room or elevated temperatures in some cases, along with the addition of adhesives.…”

Section: Introductionmentioning

confidence: 99%

“…The challenge in magnetic adsorbent synthesis is not only to improve the adsorption performance, but also to accomplish good distribution or incorporation of magnetic particles in the adsorbent morphology. Advanced synthesis routes, such as the seed-assisted method [ 29 ], pre-milling of magnetic particles with adsorbent seed crystals [ 30 ], embedding magnetic particles with a carbon source before carbonization [ 34 ], or pre-attaching magnetic particles with precursors as a dry gel before heat treatment [ 31 ], help to improve the morphology of magnetic adsorbents. Furthermore, challenges to co-synthesizing magnetic particles and adsorbents in a one-pot synthesis have recently been explored [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

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Magnetic Adsorbents for Wastewater Treatment: Advancements in Their Synthesis Methods

et al. 2022

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The remediation of water streams, polluted by various substances, is important for realizing a sustainable future. Magnetic adsorbents are promising materials for wastewater treatment. Although numerous techniques have been developed for the preparation of magnetic adsorbents, with effective adsorption performance, reviews that focus on the synthesis methods of magnetic adsorbents for wastewater treatment and their material structures have not been reported. In this review, advancements in the synthesis methods of magnetic adsorbents for the removal of substances from water streams has been comprehensively summarized and discussed. Generally, the synthesis methods are categorized into five groups, as follows: direct use of magnetic particles as adsorbents, attachment of pre-prepared adsorbents and pre-prepared magnetic particles, synthesis of magnetic particles on pre-prepared adsorbents, synthesis of adsorbents on preprepared magnetic particles, and co-synthesis of adsorbents and magnetic particles. The main improvements in the advanced methods involved making the conventional synthesis a less energy intensive, more efficient, and simpler process, while maintaining or increasing the adsorption performance. The key challenges, such as the enhancement of the adsorption performance of materials and the design of sophisticated material structures, are discussed as well.

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Section: Recent Advancements In Synthesis Methods Of Magnetic Adsorbentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Magnetic Adsorbents for Wastewater Treatment: Advancements in Their Synthesis Methods

et al. 2022

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“…Also, a robust electrostatic attraction was reported as the predominant mechanism during the sorption of acid red 66 dye onto Linde-type A zeolite (Al-dahri et al 2022), methylene blue dye onto synthetic zeolite mixture (Youssef et al 2021), methyl orange dye onto pillar(5)arene modified zeolite (Yang et al 2019b) and methylene blue dye onto zeolite/cerium oxide nanocomposite (Nyankson et al 2020). Furthermore, Phouthavong et al (2020) reported the efficient binding of methylene blue species onto the 3-dimensional pore system of silica-rich magnetic zeolite via a pore-filling mechanism. Thus, the solution pH regulates the extent of dissociations and charge distributions of the zeolite functional groups.…”

Section: Zeolitementioning

confidence: 97%

Methods to prepare biosorbents and magnetic sorbents for water treatment: a review

et al. 2023

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Access to drinkable water is becoming more and more challenging due to worldwide pollution and the cost of water treatments. Water and wastewater treatment by adsorption on solid materials is usually cheap and effective in removing contaminants, yet classical adsorbents are not sustainable because they are derived from fossil fuels, and they can induce secondary pollution. Therefore, biological sorbents made of modern biomass are increasingly studied as promising alternatives. Indeed, such biosorbents utilize biological waste that would otherwise pollute water systems, and they promote the circular economy. Here we review biosorbents, magnetic sorbents, and other cost-effective sorbents with emphasis on preparation methods, adsorbents types, adsorption mechanisms, and regeneration of spent adsorbents. Biosorbents are prepared from a wide range of materials, including wood, bacteria, algae, herbaceous materials, agricultural waste, and animal waste. Commonly removed contaminants comprise dyes, heavy metals, radionuclides, pharmaceuticals, and personal care products. Preparation methods include coprecipitation, thermal decomposition, microwave irradiation, chemical reduction, micro-emulsion, and arc discharge. Adsorbents can be classified into activated carbon, biochar, lignocellulosic waste, clays, zeolites, peat, and humic soils. We detail adsorption isotherms and kinetics. Regeneration methods comprise thermal and chemical regeneration and supercritical fluid desorption. We also discuss exhausted adsorbent management and disposal. We found that agro-waste biosorbents can remove up to 68–100% of dyes, while wooden, herbaceous, bacterial, and marine-based biosorbents can remove up to 55–99% of heavy metals. Animal waste-based biosorbents can remove 1–99% of heavy metals. The average removal efficiency of modified biosorbents is around 90–95%, but some treatments, such as cross-linked beads, may negatively affect their efficiency.

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Photocatalytic degradation of organic pollution by converter dust under visible light: optimization and mechanism

Zhao

Guo

et al. 2022

J Mater Cycles Waste Manag

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Magnetic BEA-type zeolites: preparation by dry-gel conversion method and assessment of dye removal performance

Cited by 7 publications

References 37 publications

Magnetic Adsorbents for Wastewater Treatment: Advancements in Their Synthesis Methods

Magnetic Adsorbents for Wastewater Treatment: Advancements in Their Synthesis Methods

Methods to prepare biosorbents and magnetic sorbents for water treatment: a review

Photocatalytic degradation of organic pollution by converter dust under visible light: optimization and mechanism

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