Aluminum coated natural zeolite for water defluoridation: A mechanistic insight

Wirtu, Yohannes Desalegn; Melak, Fekadu; Yitbarek, Menberu; Astatkie, Higemengist

doi:10.1016/j.gsd.2020.100525

Cited by 10 publications

(4 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At later stages, the rate of adsorption gets slightly slower. ese are commonly observed phenomena in adsorption processes as reported in literature [34,35].…”

Section: Effect Of Contact Timementioning

confidence: 91%

Removal of Cr(VI) from Aqueous Solutions Using Biowastes: Tella Residue and Pea (Pisum sativum) Seed Shell

Kebede

Kedir

Melak

et al. 2022

The Scientific World Journal

Self Cite

View full text Add to dashboard Cite

The wide use of chromium (Cr) in different industries led to the release of a considerable amount of Cr(VI) into water bodies. Exposure to Cr(VI) can cause diseases in humans and animals. Therefore, low-cost technology for Cr(VI) removal is required. In this study, the biowastes, “Tella” residue (TR) and Pea (Pisum sativum) seed shell (PSS), were evaluated for their Cr(VI) removal efficiency from aqueous solutions. The physicochemical properties of adsorbents were studied, and the adsorbents were further characterized using FTIR and XRD. Batch adsorption experiments have shown that the Cr(VI) uptake was pH-dependent and found to be effective in a wide range of pH values (pH 1 to 10) for PSS. The kinetics of Cr(VI) removal by the adsorbents was well expressed by the pseudo-second-order model. The experimental equilibrium adsorption data fitted well with Freundlich isotherm indicating multilayers adsorption. The estimated Cr(VI) adsorption capacities of TR and PSS were 15.6 mg/g and 8.5 mg/g, respectively. On top of this, the possibility of reusing adsorbents indicates the potential applicability of TR and PSS for the treatment of Cr(VI) contaminated water. Further study on the evaluation of the efficiency of the adsorbents using real chromium-contaminated wastewater is recommended.

show abstract

“…At later stages, the rate of adsorption gets slightly slower. ese are commonly observed phenomena in adsorption processes as reported in literature [34,35].…”

Section: Effect Of Contact Timementioning

confidence: 91%

Removal of Cr(VI) from Aqueous Solutions Using Biowastes: Tella Residue and Pea (Pisum sativum) Seed Shell

Kebede

Kedir

Melak

et al. 2022

The Scientific World Journal

Self Cite

View full text Add to dashboard Cite

show abstract

“…In [32], the authors optimized the key parameters associated with the vibratory and planetary centrifugal milling processes for enhancement of the Sr 2+ and Cu 2+ selectivity of natural zeolites. In recent years, there has been considerable interest in alternative processes of the natural zeolites' activation [33][34][35][36]. Silva et al [33] proved that graphene-oxide activation by the spin-coating method improves the adsorption properties of natural zeolites.…”

Section: Introductionmentioning

confidence: 99%

“…Whereas Kang et al [34] reported that the fluorinated natural zeolite exhibits significantly better efficiency in the radon sorption compared to untreated natural zeolite. Other researchers demonstrated that the aluminum-coated natural zeolites [35] and surfactant-modified zeolites [37] are promising materials for the defluorination of drinking water. Many studies have been published on surfactant-modified zeolites as organic [38,39] and inorganic [37,40,41] toxicants adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Mineral Composition and Structural Characterization of the Clinoptilolite Powders Obtained from Zeolite-Rich Tuffs

et al. 2021

View full text Add to dashboard Cite

Clinoptilolite is a precious zeolite mineral that has the most comprehensive physicochemical properties among all the zeolite group minerals. Due to these unique properties, clinoptilolite has a wide range of applications in many different industries. In Poland, the clinoptilolite occurs only as an accompanying mineral in the sedimentary rocks nearby Rzeszów. In Europe, the abundant clinoptilolite-bearing deposits are located in Slovakia and Ukraine, where clinoptilolite mineralization occurs in the volcanic tuffs. Due to clinoptilolite’s rare performance, it is extremely crucial to manage its deposits in a complementary manner. In this paper, the mineralogical and structural characterization of the clinoptilolite powders obtained by mineral processing of the clinoptilolite-rich tuffs from Slovakia and Ukraine deposits were discussed. The scope of research covered determination of the mineral composition of the tuffs, structural analysis of the clinoptilolite crystals, as well as textural and physical properties of the powders obtained by mineral processing of the tuffs. In addition, this paper includes the comparative study of the most significant zeolite deposits in the world and investigated clinoptilolite-rich tuffs. A wide spectrum of methods was used: X-ray powder diffraction (XRD), thermal analysis (DSC, TG), X-ray fluorescence (XRF), optical microscopy, Scanning Electron Microscopy (SEM-EDS), the laser diffraction technique, and low-temperature nitrogen adsorption/desorption. The test results indicated that the major component of the tuffs is clinoptilolite, which crystallized in the form of very fine-crystalline thin plates. The clinoptilolite mineralization in the Ukrainian and Slovakian tuffs exhibited a strong resemblance to the clinoptilolite crystals in Yemeni and Turkish tuffs. With respect to the mineral composition, the investigated tuffs showed excellent conformity with the Miocene white tuffs from Romania. The Ukrainian and Slovakian tuffs do not reveal the presence of the clay minerals, which is quite common for naturally occurring zeolite-rich rocks in various deposits in the world. The textural features together with mineral composition of the investigated samples incline that they are potentially suitable raw materials for the sorbent of petroleum compounds. Moreover, the obtained results can be useful indicators with respect to the crushing and compaction susceptibility of the Ukrainian and Slovakian clinoptilolite-rich tuffs.

show abstract

“…26 Aluminum coated natural zeolite was also found to be effective toward fluoride removal. 27 However, the preparation of a zeolite based composite adsorbent via a simple route with a high adsorption capacity still remains a great challenge.…”

Section: Introductionmentioning

confidence: 99%

Sol–gel synthesis of alumina gel@zeolite X nanocomposites for high performance water defluoridation: batch and column adsorption study

Chakraborty

Naskar

2022

Mater. Adv.

View full text Add to dashboard Cite

show abstract

Aluminum coated natural zeolite for water defluoridation: A mechanistic insight

Cited by 10 publications

References 49 publications

Removal of Cr(VI) from Aqueous Solutions Using Biowastes: Tella Residue and Pea (Pisum sativum) Seed Shell

Removal of Cr(VI) from Aqueous Solutions Using Biowastes: Tella Residue and Pea (Pisum sativum) Seed Shell

Mineral Composition and Structural Characterization of the Clinoptilolite Powders Obtained from Zeolite-Rich Tuffs

Sol–gel synthesis of alumina gel@zeolite X nanocomposites for high performance water defluoridation: batch and column adsorption study

Contact Info

Product

Resources

About