Accelerated crystallization of magnetic 4A-zeolite synthesized from red mud for application in removal of mixed heavy metal ions

Xie, Wei; Zhou, Fengping; Bi, Xiaolin; Chen, Dongdong; Li, Jun; Sun, Shuiyu; Liu, Jingyong; Xiang-qing, Chen

doi:10.1016/j.jhazmat.2018.07.007

Cited by 97 publications

(30 citation statements)

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“…It is lucid from Table that the unmodified zeolites exhibited low‐adsorption capacity toward heavy metal ions compared to surface modified zeolites. The magnetic and nanoiron supported zeolites were found to exhibit higher adsorption capacity than unmodified zeolites . The present synthesized ZSM‐5/AC found to have higher efficiency compared to magnetic and nanoiron supported zeolites.…”

Section: Resultsmentioning

confidence: 65%

“…The magnetic and nanoiron supported zeolites were found to exhibit higher adsorption capacity than unmodified zeolites. 28,29 The present synthesized ZSM-5/AC found to have higher efficiency compared to magnetic and nanoiron supported zeolites. These observations establish the superiority of the synthesized adsorbents over reported adsorbents.…”

Section: Loading Capacity Comparisonmentioning

confidence: 75%

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Synthesis of zeolite/activated carbon composite material for the removal of lead (II) and cadmium (II) ions

Isaac¹,

Sivakumar

M.S.M

et al. 2019

Env Prog and Sustain Energy

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The present study reports the feasibility of synthesis of a new composite material containing zeolite (ZSM‐5) and activated carbon that was prepared from custard apple shell powder. The process consisted of the following steps: preparation of activated carbon and subsequent steam assisted dry gel conversion of tetraethyl orthosilicate and sodium aluminate to ZSM‐5 and ZSM‐5 activated carbon composite. The resulting composite materials were characterized by X‐ray diffraction, scanning electron microscope, and Brunauer–Emmett–Teller techniques. The co‐ordination of the alumina incorporated was analyzed using Al magic angle spinning nuclear magnetic resonance. A comparative study among ZSM‐5, ZSM‐5 activated carbon composite, and mechanical mixture was executed toward sequestration of Pb2+ and Cd2+ ions from aqueous solution. The ZSM‐5/activated carbon composite exhibited higher sequestration efficiency of lead (Pb2+) and cadmium (Cd2+) from aqueous solution and further from industrial effluents compared to other two sorbents. The ZSM‐5/activated carbon composite exhibited selective adsorption toward Pb2+ ions compared to Cd2+ ions and other divalent metal ions.

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Section: Resultsmentioning

confidence: 65%

Section: Loading Capacity Comparisonmentioning

confidence: 75%

Synthesis of zeolite/activated carbon composite material for the removal of lead (II) and cadmium (II) ions

Isaac¹,

Sivakumar

M.S.M

et al. 2019

Env Prog and Sustain Energy

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“…In recent times, on account of the significant attributes, such as a simple method, low-cost, environ-friendly nature, higher competence and mild micro-spheres synthesis method, geopolymers are successfully developed and commonly used as adsorbents, inorganic membranes, catalysts and for the immobilization of dangerous metal ions. Adsorption is regarded as the most efficient, uncomplicated and widespread technique for water decontamination [ 116 , 117 , 118 , 119 , 120 ]. Undeniably, activated carbon is the standard adsorbent material and is well-known as the most utilized adsorbent for water and wastewater treatment with an excellent demonstration of higher adsorption competencies for the removal of heavy metal cations, but its use gets hindered due to its comparatively high cost [ 121 ].…”

Section: Applications Of Geopolymers For Water and Wastewater Treatmentmentioning

confidence: 99%

A State-of-the-Art Review on Innovative Geopolymer Composites Designed for Water and Wastewater Treatment

Luhar

Abdullah

et al. 2021

Materials

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There is nothing more fundamental than clean potable water for living beings next to air. On the other hand, wastewater management is cropping up as a challenging task day-by-day due to lots of new additions of novel pollutants as well as the development of infrastructures and regulations that could not maintain its pace with the burgeoning escalation of populace and urbanizations. Therefore, momentous approaches must be sought-after to reclaim fresh water from wastewaters in order to address this great societal challenge. One of the routes is to clean wastewater through treatment processes using diverse adsorbents. However, most of them are unsustainable and quite costly e.g. activated carbon adsorbents, etc. Quite recently, innovative, sustainable, durable, affordable, user and eco-benevolent Geopolymer composites have been brought into play to serve the purpose as a pretty novel subject matter since they can be manufactured by a simple process of Geopolymerization at low temperature, lower energy with mitigated carbon footprints and marvellously, exhibit outstanding properties of physical and chemical stability, ion-exchange, dielectric characteristics, etc., with a porous structure and of course lucrative too because of the incorporation of wastes with them, which is in harmony with the goal to transit from linear to circular economy, i.e., “one’s waste is the treasure for another”. For these reasons, nowadays, this ground-breaking inorganic class of amorphous alumina-silicate materials are drawing the attention of the world researchers for designing them as adsorbents for water and wastewater treatment where the chemical nature and structure of the materials have a great impact on their adsorption competence. The aim of the current most recent state-of-the-art and scientometric review is to comprehend and assess thoroughly the advancements in geo-synthesis, properties and applications of geopolymer composites designed for the elimination of hazardous contaminants viz., heavy metal ions, dyes, etc. The adsorption mechanisms and effects of various environmental conditions on adsorption efficiency are also taken into account for review of the importance of Geopolymers as most recent adsorbents to get rid of the death-defying and toxic pollutants from wastewater with a view to obtaining reclaimed potable and sparkling water for reuse offering to trim down the massive crisis of scarcity of water promoting sustainable water and wastewater treatment for greener environments. The appraisal is made on the performance estimation of Geopolymers for water and wastewater treatment along with the three-dimensional printed components are characterized for mechanical, physical and chemical attributes, permeability and Ammonium (NH4+) ion removal competence of Geopolymer composites as alternative adsorbents for sequestration of an assortment of contaminants during wastewater treatment.

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“…For instance, iron ore slime (a mining waste) for Pb(II) and Hg(II) removal (Sarkar et al, 2017); carboxymethyl-chitosan treated solid sludge biochar for Pb(II) and Hg(II) ions (Ifthikar et al, 2018); coal fly ash for Hg(II) removal (Attari et al, 2017); magnetic 4A-zeolite from red mud for Al (III), Fe(II), and other metals (Xie et al, 2018). Recently, hollow porous granules (PS-HPGs) were synthesised from industrial wastes of polysulphone hollow fibre membranes when incorporated with nano-range polydopamine (PD) served as efficient adsorbent for the 80% removal of Cu(II) ions and for Zn (II) and Ni(II) ions after certain modifications (Posati et al, 2019).…”

Section: Agricultural Solid Wastes As Adsorbents/ Nonconventional Grementioning

confidence: 99%

Remediation of heavy metals using non-conventional adsorbents and biosurfactant-producing bacteria

Rastogi¹,

Kumar²

2020

Environmental Degradation: Causes and Remediation Strategies

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Heavy metal pollution in the ecosystem has attracted worldwide attention due to the persistent non-biodegradable toxic nature that affects not only human beings but also animals and vegetation. Instead of using available conventional techniques, the focus has been shifted to utilize eco-friendly, cost-effective, integrated remediation approaches that are simple, non-conventional with design flexibility and does not harm the prevailing surroundings. The main approaches utilized for remediation of heavy metal contaminated soils are sand capping or land filling, phytoremediation, bioremediation, washing, electro-chemical remediation, stabilization, soil replacement, phytoextraction, phytovoltalization, etc., but again they have their own merits and demerits. Many treatment technologies are employed at industrial scale for HM removal from wastewater effluents such as chemical precipitation, flocculation, coagulation, solvent extraction, adsorption, complexation, electro-kinetics, membrane filtration, etc. Therefore, the present chapter critically highlights the role of non-conventional adsorbents and bacterial surfactants as the best alternative technique for heavy metal remediation from contaminated soil and water systems.

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Accelerated crystallization of magnetic 4A-zeolite synthesized from red mud for application in removal of mixed heavy metal ions

Cited by 97 publications

References 50 publications

Synthesis of zeolite/activated carbon composite material for the removal of lead (II) and cadmium (II) ions

Synthesis of zeolite/activated carbon composite material for the removal of lead (II) and cadmium (II) ions

A State-of-the-Art Review on Innovative Geopolymer Composites Designed for Water and Wastewater Treatment

Remediation of heavy metals using non-conventional adsorbents and biosurfactant-producing bacteria

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