The stoichiometric dissociation constants of carbonic acid in seawater brines from 298 to 267 K
The stoichiometric dissociation constants of carbonic acid in seawater brines from 298 to 267 K
复制标题
298 至 267 K 海水中碳酸的化学计量解离常数
DOI：
10.1016/j.gca.2017.09.037
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发表时间：
2018
影响因子：
5
通讯作者：
Papadimitriou S
中科院分区：
文献类型：
--
作者：
Papadimitriou S
碳酸的化学计量离解常数通过测量碳酸盐体系的所有四个可测量参数来确定K1C和K2C（总碱度、总溶解无机碳、总质子标度上的pH值和CO2逸度），主要离子组成与参考海水相当，到实际盐度（S P）100，从25 ° C到这些溶液的冰点，最低温度为− 6 ° C。这些值，在总质子标度中报告，提供了在零度以下的温度和S P> 50的第一个这样的测定。温度电流pK 1 C和pK 2 C的（T，单位：开尔文）和S P依赖性（作为负共同的盐度）在本研究的盐度和温度范围内（33 ≤ S P ≤ 100，− 6 ° C ≤ t ≤ 25 ° C）由以下最佳拟合方程描述：pK 1 C = − 176.48 + 6.14528 S P 0.5 − 0.127714 S P +7.396 × 10 − 5 S P 2 +（9914.37 − 622.886 S P 0.5 + 29.714 S P）T − 1 +（26.05129 − 0.666812 S P 0.5）lnT（σ = 0.011，n = 62），和pK 2 C = − 323.52692 + 27.557655 S P 0.5 + 0.154922 S P − 2.48396 × 10 − 4 S P 2 +（14763.287 - 1014.819 S P 0.5 - 14.35223 S P）T − 1+（50.385807 - 4.4630415 S P 0.5）lnT（σ = 0.020，n = 62）。这些功能适用于调查的碳酸盐系统的内部海冰盐水与保守的主要离子组成相对于参考海水和本研究的温度和盐度范围内。
The stoichiometric dissociation constants of carbonic acid (K 1 C∗ and K 2 C∗) were determined by measurement of all four measurable parameters of the carbonate system (total alkalinity, total dissolved inorganic carbon, pH on the total proton scale, and CO 2 fugacity) in natural seawater and seawater-derived brines, with a major ion composition equivalent to that of Reference Seawater, to practical salinity (S P) 100 and from 25° C to the freezing point of these solutions and− 6° C temperature minimum. These values, reported in the total proton scale, provide the first such determinations at below-zero temperatures and for S P> 50. The temperature (T, in Kelvin) and S P dependence of the current pK 1 C∗ and pK 2 C∗(as negative common logarithms) within the salinity and temperature ranges of this study (33≤ S P≤ 100,− 6° C≤ t≤ 25° C) is described by the following best-fit equations: pK 1 C∗=− 176.48+ 6.14528 S P 0.5− 0.127714 S P+ 7.396× 10− 5 S P 2+(9914.37− 622.886 S P 0.5+ 29.714 S P) T− 1+(26.05129− 0.666812 S P 0.5) lnT (σ= 0.011, n= 62), and pK 2 C∗=− 323.52692+ 27.557655 S P 0.5+ 0.154922 S P− 2.48396× 10− 4 S P 2+(14763.287− 1014.819 S P 0.5− 14.35223 S P) T− 1+(50.385807− 4.4630415 S P 0.5) lnT (σ= 0.020, n= 62). These functions are suitable for application to investigations of the carbonate system of internal sea ice brines with a conservative major ion composition relative to that of Reference Seawater and within the temperature and salinity ranges of this study.
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影响因子：
5
作者：
S. Papadimitriou;H. Kennedy;P. Kennedy;Davis Thomas
通讯作者：
S. Papadimitriou;H. Kennedy;P. Kennedy;Davis Thomas
影响因子：
3.7
作者：
D. Turner;E. Achterberg;C. Chen;S. Clegg;V. Hatje;M. T. Maldonado;S. Sander;C. M. G. van den Berg;Mona Wells
通讯作者：
D. Turner;E. Achterberg;C. Chen;S. Clegg;V. Hatje;M. T. Maldonado;S. Sander;C. M. G. van den Berg;Mona Wells
影响因子：
2.7
作者：
Hales, B;Chipman, D;Takahashi, T
通讯作者：
Takahashi, T
影响因子：
5.2
作者：
Hain, Mathis P.;Sigman, Daniel M.;Haug, Gerald H.
通讯作者：
Haug, Gerald H.
影响因子：
1.6
作者：
M. Fischer;D. Thomas;A. Krell;G. Nehrke;J. Göttlicher;L. Norman;K. Meiners;C. Riaux-Gobin;G. Dieckmann
通讯作者：
M. Fischer;D. Thomas;A. Krell;G. Nehrke;J. Göttlicher;L. Norman;K. Meiners;C. Riaux-Gobin;G. Dieckmann