重碳酸盐溶液pH的普遍化计算公式
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- 英文论文题名：Generalized pH-Formula of a bicarbonate solution
- 论文作者：成弘 ; 王坚朴
- 英文论文作者：CHENG Hong ; WANG Jian-pu ; Beijing Research Institute of Chemical Engineering and Metallurgy ; CNNC ; China National Investment Consulting Co. ; LTD.
- 年：2015
- 作者机构：核工业北京化工冶金研究院;中投咨询有限公司;
- 论文关键词：重碳酸盐溶液 ; pH值 ; 普遍化公式
- 英文论文关键词：bicarbonate solution ; pH value ; generalized formula
- 会议召开时间：2015-09-21
- 会议录名称：中国核科学技术进展报告（第四卷）——中国核学会2015年学术年会论文集第6册（核化学与放射化学分卷、核化工分卷）
- 语种：中文
- 分类号：O646.14
- 学会代码：EGVD
- 会议名称：中国核学会2015年学术年会
- 会议地点：中国四川绵阳
- 主办单位：中国核学会
- 学会名称：中国核学会
- 页数：6
- 文件大小：471k
- 原文格式：O
- 会议级别：全国
摘要
重碳酸盐溶液pH与浓度的准确计算公式是铀矿碳酸盐浸出和CO_2地质封存的理论基础。现有计算公式不适用于低浓度和微量溶液体系。基于电荷平衡和质量衡算,本文提出了普遍化的关于重碳酸盐溶液pH值的计算公式,与已有公式进行了比较,并提出了验证计算公式可靠性的判据。计算结果表明:(1)普遍化计算公式满足准确性判据要求,可对全浓度范围内pH值进行准确计算;(2)重碳酸盐解离度的最小值和最大值分别为0.201%和18.39%,对应pH分别为8.34和7.0,对应溶液浓度分别为≥4.5×10~(-4)mol/L和无限稀释溶液。
The exact pH formula about a bicarbonate solution is the theoretical foundation of carbonate leaching of uranium deposits and geological storage of carbon dioxide.Since the existing pH formula about a bicarbonate solution cannot be applied to the lower concentration,especially the micro quantity and trace system,a generalized pH formula is proposed according to the conservation equations of carbonate species and electric charges(or electric neutrality),and its criteria certified for exactness.The calculated results shows(1) The generalized pH-formula meets the demand of exact criteria,and can give the exact value in wide range of concentration of sodium bicarbonate;(2) The minimum and maximum of dissociation degree of bicarbonate are 0.201% and 18.39%respectively,the former is relevant to pH = 8.34 and concentration of sodium bicarbonate beyond 4.5×10~(-4)mol/L,the latter is pH = 7.0 and infinite dilute solution.
The exact pH formula about a bicarbonate solution is the theoretical foundation of carbonate leaching of uranium deposits and geological storage of carbon dioxide.Since the existing pH formula about a bicarbonate solution cannot be applied to the lower concentration,especially the micro quantity and trace system,a generalized pH formula is proposed according to the conservation equations of carbonate species and electric charges(or electric neutrality),and its criteria certified for exactness.The calculated results shows(1) The generalized pH-formula meets the demand of exact criteria,and can give the exact value in wide range of concentration of sodium bicarbonate;(2) The minimum and maximum of dissociation degree of bicarbonate are 0.201% and 18.39%respectively,the former is relevant to pH = 8.34 and concentration of sodium bicarbonate beyond 4.5×10~(-4)mol/L,the latter is pH = 7.0 and infinite dilute solution.
引文
[1]成弘,邓锦勋.CO_2原地浸出过程的U(Ⅵ)溶液化学研究,全国铀矿大基地建设学术研讨会论文集[C],1272-1279.海南海口,2012.12.19-23.
[2]成弘,刘乃忠,曾毅君,等.碱性U(Ⅵ)溶液稳定性及其控制方程,中国核科学技术进展报告(第三卷)铀矿冶卷[M].北京:中国原子能出版社,2013,140-148.
[3]朱玉珍,顾达,黑恩成.现代基础化学[M].北京:化学工业出版社,1998,287.
[4]武汉大学《无机及分析化学》编写组.无机及分析化学.3rd ed.[M].武汉:武汉大学出版社,2008,114~117.
[5]L.G.Sillen,et al.Stability constants of metal-ion complexes:Supplement.London:Chemical Society[M].1971.
[2]成弘,刘乃忠,曾毅君,等.碱性U(Ⅵ)溶液稳定性及其控制方程,中国核科学技术进展报告(第三卷)铀矿冶卷[M].北京:中国原子能出版社,2013,140-148.
[3]朱玉珍,顾达,黑恩成.现代基础化学[M].北京:化学工业出版社,1998,287.
[4]武汉大学《无机及分析化学》编写组.无机及分析化学.3rd ed.[M].武汉:武汉大学出版社,2008,114~117.
[5]L.G.Sillen,et al.Stability constants of metal-ion complexes:Supplement.London:Chemical Society[M].1971.