Physiochemical Characterization of Ethiopian Mined Kaolin Clay through Beneficiation Process

Ayalew, Adane Adugna

doi:10.1155/2023/9104807

Cited by 2 publications

(2 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The diffraction peak at 2θ = 29.9 • was assigned to (011) of the silica oxide (SiO 2 ) phase (JCPDS file 01-081-0069). The XRD peaks of the treated-DD3 (Figure 1b) showed a significant increase in intensity, indicating a rise in the clay minerals' crystallinity [56,57,59]. This may be due to the removal of the amorphous layer by the acid, which allowed the X-ray beam to directly access both the octahedral and tetrahedral sites.…”

Section: Statistical Evaluation Criteriamentioning

confidence: 99%

“…The MnO content reached up to 0.71% for DD3 and 0.91% for treated-DD3 because kaolinite DD3 was impure and hence grey in color. The percentage of loss in ignition of DD3 (19.56%) and treated-DD3 (22.58%) resulted from the presence of water in the different minerals (kaolinite, gibbsite, and todorokite)[55][56][57]. The high level of clay material purity created rheological and physico-chemical features and directly impacted on the quality of the ceramic industry raw materials[2].…”

mentioning

confidence: 99%

See 1 more Smart Citation

Enhanced Adsorption Capacity of Methylene Blue Dye onto Kaolin through Acid Treatment: Batch Adsorption and Machine Learning Studies

Hamri,

Imessaoudene,

Hadadi

et al. 2024

Water

View full text Add to dashboard Cite

Algerian kaolinite, sourced from Djebel Debbagh nuance 3 (DD3), was used as a low-cost adsorbent to remove methylene blue (MB) dye from water. Its adsorption capacity was enhanced through sulfuric acid treatment (treated-DD3). In response to the urgent demand for clean water, various technologies have been developed to address dye removal from wastewater. This study, specifically delving into the treatment of textile wastewater, examined the efficacy of treated-DD3 through adsorption processes. The acid treatment increased the surface area and pore volume of DD3. X-ray diffraction showed crystalline phases in both, with treated-DD3 having higher crystallinity. Fourier-transform infrared spectroscopy found no significant differences post-acid treatment. Scanning electron microscopy revealed DD3 had large, stacked particles with low surface area, while treated-DD3 had increased porosity and a smoother surface. Various parameters affecting MB adsorption were studied. The Langmuir and Freundlich models were used for isotherm parameters. Treated-DD3 exhibited a higher MB adsorption capacity (64.58 mg/g according to the Langmuir model) than DD3 (44.48 mg/g). Thermodynamic analysis indicated spontaneous and endothermic MB adsorption onto both DD3-BM and treated-DD3-BM systems under different pH conditions. Treated-DD3 effectively reduced chemical oxygen demand (from 304.056 mg/L to 34.44 mg/L) and biological oxygen demand (from 80 mg/L to 20 mg/L) in real textile wastewater. The adsorbent exhibited rapid removal and decolorization, surpassing 93% within the first 7 min of the experiment. The Gaussian process regression and particle swarm optimization (GPR–PSO) predicted MB adsorption capacity effectively (R = 0.9989, R2 = 0.9978, adj-R2 = 0.9978, RMSE = 1.1390, and MAE = 0.3926).

show abstract

Section: Statistical Evaluation Criteriamentioning

confidence: 99%

mentioning

confidence: 99%

Enhanced Adsorption Capacity of Methylene Blue Dye onto Kaolin through Acid Treatment: Batch Adsorption and Machine Learning Studies

Hamri,

Imessaoudene,

Hadadi

et al. 2024

Water

View full text Add to dashboard Cite

show abstract

Effect of magnesia additive on the morphology and physico‐mechanical properties of kaolinitic clays ceramics

Nurudeen,

Dagwa,

Ugheoke

et al. 2024

Applied Research

View full text Add to dashboard Cite

Nigeria is rich in various minerals, including crude oil and solid minerals. However, despite this abundance, effectively utilizing these resources remains a challenge. Kaolin, also known as white China clay, is a crucial raw material used in industries such as ceramics, paper, paint, plastic, and welding electrodes. Despite its plentiful availability in Nigeria, kaolin has not been adequately exploited. Consequently, Nigeria spends approximately 14.35 million USD annually to import refined kaolin to meet local demand, due to the lack of capacity to process it to the required industrial standards. This study investigates the effect of magnesia (MgO) on the morphology and physico‐mechanical properties of kaolinitic clay ceramics using the slip‐casting method. Various analytical techniques were employed to examine the kaolin, including X‐ray fluorescence (XRF), X‐ray diffraction (XRD), thermogravimetric analysis (TGA), Fourier Transform Infrared Spectroscopy (FTIR), and Scanning Electron Microscopy (SEM). Also, compressive and flexural tests were conducted. The XRF analysis revealed that all samples contained SiO2 (54.41%wt), Al2O3 (34.05%wt), and other trace elements. The main mineral phases identified were quartz, microcline, and orthoclase. Among the samples, 30–200 exhibited the highest compressive strength at 218 MPa, while the highest flexural rigidity was observed in sample 15–200. The results indicated that MgO significantly affected the properties of kaolin, as the control sample had a compressive strength of 59 MPa. The study also found that the quantities of additives should align with stoichiometric requirements. Results showed hypo‐stoichiometry in samples 30–600 and 15–400, and hyper‐stoichiometry in sample 60–200. XRF, XRD, and FTIR spectra confirmed the elemental and chemical compositions of the samples, while SEM analysis revealed the morphological structure. It was observed that increasing the magnesia content from 10% to 30% led to an increase in pore spaces within the samples. TGA analysis provided insights into the relationship between mass loss and temperature variation in the ceramic samples, While The DTG curves explain the endothermic phase changes over changes in temperature; at 50–150°C, loss of the water phase is complete, at 300–400°C burning of organic matter phase is achieved and at 500–700°C endothermic dihyroxylation phase begins forming armorphous meta‐kaolin.

show abstract

Physiochemical Characterization of Ethiopian Mined Kaolin Clay through Beneficiation Process

Cited by 2 publications

References 49 publications

Enhanced Adsorption Capacity of Methylene Blue Dye onto Kaolin through Acid Treatment: Batch Adsorption and Machine Learning Studies

Enhanced Adsorption Capacity of Methylene Blue Dye onto Kaolin through Acid Treatment: Batch Adsorption and Machine Learning Studies

Effect of magnesia additive on the morphology and physico‐mechanical properties of kaolinitic clays ceramics

Contact Info

Product

Resources

About