Rosa Ester Guidone , Xavier Gaona , Marcus Altmaier , Barbara Lothenbach
{"title":"水合水泥相对葡萄糖酸盐和甲酸盐的吸收","authors":"Rosa Ester Guidone , Xavier Gaona , Marcus Altmaier , Barbara Lothenbach","doi":"10.1016/j.apgeochem.2024.106145","DOIUrl":null,"url":null,"abstract":"<div><p>The uptake of formate and gluconate by C–S–H, AFm phases, ettringite and hydrated Portland cement (PC) was studied at pH 13 by batch sorption experiments. The formation of gluconate and formate-AFm phases was observed in pure systems, but not in hydrated cement. Gluconate sorbs more strongly on AFm phases and ettringite than formate. Higher calcium concentrations increase the gluconate sorption on C–S–H and hydrated Portland cements due the formation of Ca-gluconate surface complexes on C–S–H. Measured R<sub>d</sub> values for gluconate sorption on C–S–H increase from 2.0 dm<sup>3</sup>‧kg<sup>−1</sup> for C–S–H with Ca/Si = 0.8 to 34 dm<sup>3</sup>‧kg<sup>−1</sup> for Ca/Si = 1.4 at pH 13. They are a factor 5 to 10 higher at lower pH values, and higher Ca-concentrations. Calcium concentration does not significantly affect the uptake of formate by C–S–H. Formate sorbs on hydrated PC with R<sub>d</sub> values in the range of 3–33 dm<sup>3</sup>‧kg<sup>−1</sup>.</p></div>","PeriodicalId":8064,"journal":{"name":"Applied Geochemistry","volume":"175 ","pages":"Article 106145"},"PeriodicalIF":3.1000,"publicationDate":"2024-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0883292724002506/pdfft?md5=12a256d055d625d8ead017a1ed50bd10&pid=1-s2.0-S0883292724002506-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Gluconate and formate uptake by hydrated cement phases\",\"authors\":\"Rosa Ester Guidone , Xavier Gaona , Marcus Altmaier , Barbara Lothenbach\",\"doi\":\"10.1016/j.apgeochem.2024.106145\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The uptake of formate and gluconate by C–S–H, AFm phases, ettringite and hydrated Portland cement (PC) was studied at pH 13 by batch sorption experiments. The formation of gluconate and formate-AFm phases was observed in pure systems, but not in hydrated cement. Gluconate sorbs more strongly on AFm phases and ettringite than formate. Higher calcium concentrations increase the gluconate sorption on C–S–H and hydrated Portland cements due the formation of Ca-gluconate surface complexes on C–S–H. Measured R<sub>d</sub> values for gluconate sorption on C–S–H increase from 2.0 dm<sup>3</sup>‧kg<sup>−1</sup> for C–S–H with Ca/Si = 0.8 to 34 dm<sup>3</sup>‧kg<sup>−1</sup> for Ca/Si = 1.4 at pH 13. They are a factor 5 to 10 higher at lower pH values, and higher Ca-concentrations. Calcium concentration does not significantly affect the uptake of formate by C–S–H. Formate sorbs on hydrated PC with R<sub>d</sub> values in the range of 3–33 dm<sup>3</sup>‧kg<sup>−1</sup>.</p></div>\",\"PeriodicalId\":8064,\"journal\":{\"name\":\"Applied Geochemistry\",\"volume\":\"175 \",\"pages\":\"Article 106145\"},\"PeriodicalIF\":3.1000,\"publicationDate\":\"2024-08-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S0883292724002506/pdfft?md5=12a256d055d625d8ead017a1ed50bd10&pid=1-s2.0-S0883292724002506-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Geochemistry\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0883292724002506\",\"RegionNum\":3,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"GEOCHEMISTRY & GEOPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Geochemistry","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0883292724002506","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
Gluconate and formate uptake by hydrated cement phases
The uptake of formate and gluconate by C–S–H, AFm phases, ettringite and hydrated Portland cement (PC) was studied at pH 13 by batch sorption experiments. The formation of gluconate and formate-AFm phases was observed in pure systems, but not in hydrated cement. Gluconate sorbs more strongly on AFm phases and ettringite than formate. Higher calcium concentrations increase the gluconate sorption on C–S–H and hydrated Portland cements due the formation of Ca-gluconate surface complexes on C–S–H. Measured Rd values for gluconate sorption on C–S–H increase from 2.0 dm3‧kg−1 for C–S–H with Ca/Si = 0.8 to 34 dm3‧kg−1 for Ca/Si = 1.4 at pH 13. They are a factor 5 to 10 higher at lower pH values, and higher Ca-concentrations. Calcium concentration does not significantly affect the uptake of formate by C–S–H. Formate sorbs on hydrated PC with Rd values in the range of 3–33 dm3‧kg−1.
期刊介绍：
Applied Geochemistry is an international journal devoted to publication of original research papers, rapid research communications and selected review papers in geochemistry and urban geochemistry which have some practical application to an aspect of human endeavour, such as the preservation of the environment, health, waste disposal and the search for resources. Papers on applications of inorganic, organic and isotope geochemistry and geochemical processes are therefore welcome provided they meet the main criterion. Spatial and temporal monitoring case studies are only of interest to our international readership if they present new ideas of broad application.
Topics covered include: (1) Environmental geochemistry (including natural and anthropogenic aspects, and protection and remediation strategies); (2) Hydrogeochemistry (surface and groundwater); (3) Medical (urban) geochemistry; (4) The search for energy resources (in particular unconventional oil and gas or emerging metal resources); (5) Energy exploitation (in particular geothermal energy and CCS); (6) Upgrading of energy and mineral resources where there is a direct geochemical application; and (7) Waste disposal, including nuclear waste disposal.
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