Preparation of hydrated lime quality for water treatment: to reduce silica concentration from hydrated lime up to standard specification

Shimelis, Bifa; Saka, Abel; Jule, Leta Tesfaye; Bekele, Bulcha; Redi, Mesfin; N, Nagaprasad.; Esakkiraj, E.S.; Stalin, B.; Ramaswamy, Krishnaraj

doi:10.5004/dwt.2022.28089

Cited by 2 publications

(2 citation statements)

References 17 publications

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“…Limestone is utilised not just for cement manufacturing but also for its alkaline characteristics and ability to interact with water, rendering it appropriate for a variety of industrial applications as a crucial precursor in the creation of compounds, including calcium hydroxide, calcium carbonate, and calcium chloride (Shimelis et al, 2022). Limestone is essential in environmental clean-up projects, including wastewater treatment and soil stabilisation, due to its capacity to neutralise acidic pollutants (Sabir et al, 2023).…”

Section: Manufacturing Sectormentioning

confidence: 99%

Unveiling the Geological Significance and Industrial Application of Limestone: A Comprehensive Review

Kambakhsh,

Haqbin,

Inanch

et al. 2024

IEMJ

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Limestone emerges as a fundamental component within sedimentary rock formations, which provides important information about previous geological eras and environmental circumstances. It retains fossils and remnants of extinct living forms because it mostly contains calcium carbonate. These deposits are used as traces of freshwater, marine, and terrestrial habitats from the past. Furthermore, variations in the creation of limestone provide hints about past geological events like tectonic activity and sea level shifts. Scientists can reconstruct previous ecosystems, temperatures, and evolutionary patterns by analyzing limestone, which helps us better comprehend Earth's environmental dynamics and history over millions of years. Its versatility extends beyond its geological significance, and its primary uses are in the manufacturing of steel and cement, as well as in the purification of wastewater and the processes involved in the production of bread and sugar. Limestone is also essential for supporting the carbon cycle and improving soil health in agricultural settings. In the review paper, we endeavored to conduct additional research to comprehend the intricacies of geology and the industrial application of limestone, as well as the need for interdisciplinary collaboration, sustainable practices, and cutting-edge technologies to leverage mineral resources for industrial growth. To be effective, it is essential. This study concludes with a strong call to action, imploring stakeholders to emphasize sustainable practices and encourage interdisciplinary collaboration while using limestone. By adhering to these guidelines, we can maximize the benefits of this priceless natural resource for both industrial use and environmental sustainability while also protecting it for future generations.

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Section: Manufacturing Sectormentioning

confidence: 99%

Unveiling the Geological Significance and Industrial Application of Limestone: A Comprehensive Review

Kambakhsh,

Haqbin,

Inanch

et al. 2024

IEMJ

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“…To date, numerous strategies have been proposed to address silica scaling by using chemical inhibitors (e.g., lime, caustic soda, and soda ash) [15][16][17], pH adjustments [18], and ion exchange [19], precipitation [20], softening [21], and coagulation [22] methods. However, these approaches still lack practicality due to insufficient silica removal and the generation of significant sludge, resulting in shortcomings in terms of cost-effectiveness, environmental impact, or sustained efficacy over time [6,23].…”

Section: Introductionmentioning

confidence: 99%

Silica Scaling Inhibition in Water Treatment Process Using Fibrous Al2O3-Nylon 6 Adsorbents

Phan,

Sato,

Kobayashi

2024

Fibers

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This study describes a novel approach using fibrous Al2O3-Nylon 6 composites to induce inhibition behavior in silica scaling systems. The composite fibers were fabricated with a wet-spinning process using the coagulation of a methanolic Nylon-CaCl2 solution with Al2O3 powder after immersing the thread-like solution in water. The mesoporous nylon fibers composed of Al2O3 powders ranging from 10 to 30 wt% loading demonstrated superior adsorption capabilities to silica in water, behaving with the Freundlich model and exhibiting effective multilayer adsorption onto the Al2O3 sites embedded in the fiber. Furthermore, the composite fibers inhibited silica scaling, even at high concentrations, due to a substantially efficient reduction in soluble silica when the composite fiber was present in the system. The utilization of 15 g of composite fibers resulted in a rapid drop to approximately 30 mg/L within the initial 10 h, which is a considerable improvement compared to the 300 mg/L observed in the fiber-free control sample. Notably, the presence of an elevated fiber content exceeding 7.5 g demonstrated the complete inhibition of silica precipitation. An analysis of the pore volume using nitrogen adsorption experiments before and after silica adsorption showed that silica adsorption resulted in a significant decrease in mesoporous properties at the alumina sites. This indicated an efficient adsorption of silica onto the alumina site, effectively removing silica from the system.

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Preparation of hydrated lime quality for water treatment: to reduce silica concentration from hydrated lime up to standard specification

Cited by 2 publications

References 17 publications

Unveiling the Geological Significance and Industrial Application of Limestone: A Comprehensive Review

Unveiling the Geological Significance and Industrial Application of Limestone: A Comprehensive Review

Silica Scaling Inhibition in Water Treatment Process Using Fibrous Al2O3-Nylon 6 Adsorbents

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