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10.1088/1468-6996/12/6/064702 http://scihub22266oqcxt.onion/10.1088/1468-6996/12/6/064702 C5090667!5090667 !27877452     free     free     free Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=27877452 &cmd=llinks): Failed to open stream: HTTP request failed! 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Monohydrocalcite: a promising remediation material for hazardous anions |pdf=|usr=}}{{27877452 }} gab.com Text Monohydrocalcite: a promising remediation material for hazardous anions JO: Sci Technol Adv Mater http://www.kidney.de/pget.php?&tw=1&pmid=27877452 #FOAvip The formation conditions, solubility and stability of monohydrocalcite (MHC, CaCO(3)·H(2)O), as well as sorption behaviors of toxic anions on MHC, are reviewed to evaluate MHC as a remediation material for hazardous oxyanions. MHC is a rare mineral in geological settings that occurs in recent sediments in saline lakes. Water temperature does not seem to be an important factor for MHC formation. The pH of lake water is usually higher than 8 and the Mg/Ca ratio exceeds 4. MHC synthesis experiments as a function of time indicate that MHC is formed from amorphous calcium carbonate and transforms to calcite and/or aragonite. Most studies show that MHC forms from solutions containing Mg, which inhibits the formation of stable calcium carbonates. The solubility of MHC is higher than those of calcite, aragonite and vaterite, but lower than those of ikaite and amorphous calcium carbonate at ambient temperature. The solubility of MHC decreases with temperature. MHC is unstable and readily transforms to calcite or aragonite. The transformation consists of the dissolution of MHC and the subsequent formation of stable phases from the solution. The rate-limiting steps of the transformation of MHC are the nucleation and growth of stable crystalline phases. Natural occurrences indicate that certain additives, particularly PO(4) and Mg, stabilize MHC. Laboratory studies confirm that a small amount of PO(4) in solution (>30 ?M) can significantly inhibit the transformation of MHC. MHC has a higher sorption capacity for PO(4) than calcite and aragonite. The modes of PO(4) uptake are adsorption on the MHC surface at moderate phosphate concentrations and precipitation of secondary calcium phosphate minerals at higher concentrations. Arsenate is most likely removed from the solution during the transformation of MHC. The proposed sorption mechanism of arsenate is coprecipitation during crystallization of aragonite. The arsenic sorption capacity by MHC is significantly higher than simple adsorption on calcite. Twit Text FOAVip Monohydrocalcite: a promising remediation material for hazardous anions ????Sci Technol Adv Mater http://www.kidney.de/pget.php?&tw=1&pmid=27877452 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=27877452 #FOAvip English Wikipedia <ref>{{Cite pmid|27877452 }}</ref> Monohydrocalcite: a promising remediation material for hazardous anions #MMPMID27877452 Fukushi K ; Munemoto T ; Sakai M ; Yagi S Sci Technol Adv Mater 2011[Dec]; 12 (6 ): 064702 PMID27877452 show ga The formation conditions, solubility and stability of monohydrocalcite (MHC, CaCO(3)·H(2)O), as well as sorption behaviors of toxic anions on MHC, are reviewed to evaluate MHC as a remediation material for hazardous oxyanions. MHC is a rare mineral in geological settings that occurs in recent sediments in saline lakes. Water temperature does not seem to be an important factor for MHC formation. The pH of lake water is usually higher than 8 and the Mg/Ca ratio exceeds 4. MHC synthesis experiments as a function of time indicate that MHC is formed from amorphous calcium carbonate and transforms to calcite and/or aragonite. Most studies show that MHC forms from solutions containing Mg, which inhibits the formation of stable calcium carbonates. The solubility of MHC is higher than those of calcite, aragonite and vaterite, but lower than those of ikaite and amorphous calcium carbonate at ambient temperature. The solubility of MHC decreases with temperature. MHC is unstable and readily transforms to calcite or aragonite. The transformation consists of the dissolution of MHC and the subsequent formation of stable phases from the solution. The rate-limiting steps of the transformation of MHC are the nucleation and growth of stable crystalline phases. Natural occurrences indicate that certain additives, particularly PO(4) and Mg, stabilize MHC. Laboratory studies confirm that a small amount of PO(4) in solution (>30 ?M) can significantly inhibit the transformation of MHC. MHC has a higher sorption capacity for PO(4) than calcite and aragonite. The modes of PO(4) uptake are adsorption on the MHC surface at moderate phosphate concentrations and precipitation of secondary calcium phosphate minerals at higher concentrations. Arsenate is most likely removed from the solution during the transformation of MHC. The proposed sorption mechanism of arsenate is coprecipitation during crystallization of aragonite. The arsenic sorption capacity by MHC is significantly higher than simple adsorption on calcite. äMonohydrocalcite: a promising remediation material for hazardous anion(epmc).pdf DeepDyve Pubget Overpricing