Influence of natural water composition on reactivity of quicklime derived from Ca-rich and Mg-rich limestone: implications for sustainability of lime manufacturing through geochemical modeling
| Autor: | Ioannis Baziotis, S. Tsimas, Elias Chatzitheodoridis, Vassilis N. Stathopoulos, G. Leontakianakos, L. Profitis, Z. Kypritidou |
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| Rok vydání: | 2016 |
| Předmět: |
General Chemical Engineering
Inorganic chemistry 0211 other engineering and technologies 02 engineering and technology 010501 environmental sciences engineering.material 01 natural sciences Chloride law.invention chemistry.chemical_compound law 021105 building & construction medicine Calcination Sulfate 0105 earth and related environmental sciences Geochemical modeling Lime Brackish water Chemistry General Chemistry Environmental chemistry engineering Water treatment Water quality medicine.drug |
| Zdroj: | RSC Advances. 6:65799-65807 |
| ISSN: | 2046-2069 |
| DOI: | 10.1039/c6ra11346j |
| Popis: | We studied the effects of water quality on the hydration of quicklimes prepared from calcitic limestone and dolomitic limestone during calcination at 1050 °C. At a low total chloride and sulfate content, reactivity is insensitive to concentration and no effect on quicklime slaking is seen. At higher concentrations, however, we observe a chromatographic effect for chlorides and sulfates. Concentrated chlorides react with the slaking water, forming products such as CaCl2 that are much more soluble than Ca(OH)2, which facilitates transformation of quicklime to slaked lime. In the range of sulfate concentrations in natural waters we observed no effect of sulfates during quicklime hydration. Consequently, in natural waters and their mixtures (conductivity < 2600 μS cm−1), only chloride concentrations are found to promote quicklime hydration. These results suggest that water treatment technologies, applied to natural light brackish water compositions, will not lead to quality improvement for lime-industry products. |
| Databáze: | OpenAIRE |
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