Preparation and application of modified zeolites as adsorbents in wastewater treatment

Shi, Jiahui; Yang, Zixuan; Dai, Hongliang; Lü, Xiwu; Peng, Lihong; Tan, Xiangyi; Shi, Lijun; Fahim, Raana

doi:10.2166/wst.2018.249

Cited by 83 publications

(48 citation statements)

References 57 publications

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“…is newly fabricated composite polymer-zeolite showed great potential together with an effective capacity for the adsorption of gases like methane and carbon dioxide [112]. e fabrication of zeolites can be achieved by direct synthesis [113], sol gel method [114], or by a nonhydrothermal process [115,116].…”

Section: Conditionsmentioning

confidence: 99%

Overview of Current and Future Perspectives of Saudi Arabian Natural Clinoptilolite Zeolite: A Case Review

Alsawalha

2019

Journal of Chemistry

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After a thorough review of existing studies of clinoptilolite zeolites, three areas for potential investigation of the Saudi Arabian zeolites were found. They are the characterizations, the catalytic activity, active sites, and uses of natural clinoptilolite zeolites. First, no analysis is available worldwide to compare the percentage weight of local zeolites with those sourced from other countries, nor does one exist for the establishment on the zeolite conversion of MBOH with water on acidic catalysts at lower temperatures. Secondly, a review of current literature on the topic revealed that basic and active sites of Saudi Arabian zeolites have yet to be examined. Future investigation of zeolite catalytic activity can be achieved by methyl butynol test reaction (MBOH) and absorption-desorption of ammonia. In the characterization of a range of international materials, the methyl butynol test reaction was utilized, including on natural zeolites, natural clays, and synthesized hydrotalcites. However, the catalytic performance of natural Saudi Arabian clinoptilolite zeolites by test reaction of MBOH conversion has not been yet investigated. Therefore, this article also includes an outline of the general testing conditions and parameters required to execute the accurate characterization of local Saudi clinoptilolite under optimal test conditions. Likewise, knowledge of the important active acidic centers of local materials is prescribed. This can be ascertained by determining the conditions together with the test parameters for the application of the “temperature-programmed desorption of ammonia” method in order to obtain an accurate determination of local Saudi clinoptilolite acidic centers. Additionally, an outline of the catalytic activity of worldwide clinoptilolite is given in this article together with kinetic investigations of other sources for the clinoptilolite zeolite in order to form the basis for the testing of local Saudi clinoptilolite. The percentage average of chemical composition (Wt.%) of natural clinoptilolite from various countries is also included. Finally, a future research plan is proposed here. This will form the basis for a complete study or survey to be compiled detailing the modifications needed to increase the surface areas for Saudi natural clinoptilolite zeolites using different methods of modifications. This could enhance its application as acid catalysts for use in the retardation of coke formation and for membrane separation on cationic exchange.

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Section: Conditionsmentioning

confidence: 99%

Overview of Current and Future Perspectives of Saudi Arabian Natural Clinoptilolite Zeolite: A Case Review

Alsawalha

2019

Journal of Chemistry

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“…The advantages of chemical sorption methods include cost efficiency, availability of raw material base, high storage potential of new materials [6]. However, some sorbents described in scientific literature have essential disadvantsges, such as the impossibility of regeneration, instability to hostile environment, difficulties of automation of waste water detoxication [7]. A significant restriction to a wide use of some highly effective sorbents is the form of productiongranules or powder [8].…”

Section: Imentioning

confidence: 99%

Hygienic Efficiency of Treatment Strongly Polluted Industrial Waste Water Using Fibrous Ion-Exchange Materials

Trukhina¹,

Skupnevskiy²

2019

Proceedings of the International Symposium "Engineering and Earth Sciences: Applied and Fundamental Research" Dedicated to the

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The paper analyzes polymer fibrous ion-exchange materials on the basis of polyacrylonitrile matrix released as KN-1 cation exchanger and AS-1 and AN-1 anion exchangers. The purpose is to study the sorption properties of the specified materials in relation to multicomponent salt solutions of heavy metals. According to obtained results, the exchange processes are characterized by high speed, and materialsby high exchange capacity. The cascade filtration purifies heavily polluted industrial waste waters to the levels of 10-3 mg/l of Pb (II), Zn(II), CD (II), Cu(II), Mo(VI), W(VI) thus fully satisfying hygienic requirements. The advantages of the studied materials include low flow resistance, a possibility of repeated regeneration (with acid and alkali) with desorption of valuable components and creation of waste-free or low-waste technologies on their basis.

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“…Wang et al [10] synthesized Cr-doped TiO 2 supported zeolites in order to improve their structures, pore size, channels and absorption ability during photocatalytic activities [13,27,28]. Nyankson et al [12] also reported Zn (II) supported zeolite as the Zn-zeolite framework that generates a secondary pore; the secondary pore results larger surface area and has the ability to removal dyes, heavy metals, pesticides, and other pollutants from water [13,29]. erefore, this review explores the synthesis, characterization, and applications of zeolite [13,22,29].…”

Section: Introductionmentioning

confidence: 99%

A Short Review on Synthesis, Characterization, and Applications of Zeolites

Derbe¹,

Temesgen²,

Bitew

2021

Advances in Materials Science and Engineering

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The review emphasizes on synthesis, characterization, and application of zeolite. Zeolite is a hydrated aluminosilicate having a tetrahedral structural framework; it contains channels and cages which are occupied by exchangeable active metal ions and water molecules. Zeolite was synthesized through different synthesis methods, particularly, hydrothermal and green synthesis methods. The review also has tried to address the structure of zeolite such as morphology, functional group, and particle size using different characterization methods as reported via different authors. The characterization results verify that zeolite shows many unique properties such as uniform pore size, acidic properties, thermal stability, mobile extra cation, hydrophilicity, and hydrophobicity. These lead to a number of applications in catalysis, water purification, adsorption, and agriculture.

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Preparation and application of modified zeolites as adsorbents in wastewater treatment

Cited by 83 publications

References 57 publications

Overview of Current and Future Perspectives of Saudi Arabian Natural Clinoptilolite Zeolite: A Case Review

Overview of Current and Future Perspectives of Saudi Arabian Natural Clinoptilolite Zeolite: A Case Review

Hygienic Efficiency of Treatment Strongly Polluted Industrial Waste Water Using Fibrous Ion-Exchange Materials

A Short Review on Synthesis, Characterization, and Applications of Zeolites

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