Quantification of boron incorporation into synthetic calcite under controlled pH and temperature conditions using a differential solubility technique

doi:10.1016/j.chemgeo.2012.11.013

	Quantification of boron incorporation into synthetic calcite under controlled pH and temperature conditions using a differential solubility technique
	He, MY (He, Maoyong)[ 1,2 ]; Luo, CG (Luo, Chongguang)[ 2 ]; Zhang, YL (Zhang, Yanling)[ 2 ]; Ma, YQ (Ma, Yunqi)[ 2 ]; Liu, WG (Liu, Weiguo)[ 1 ]; Jin, ZD (Jin, Zhangdong)[ 1 ]; Xiao, YK (Xiao, Yingkai)[ 2 ]
刊名	CHEMICAL GEOLOGY
	2013-01-28
卷号	337-338 页码:67-74
关键词	Boron Synthetic Calcite Differential Solubility Incorporation
DOI	10.1016/j.chemgeo.2012.11.013
文献子类	期刊论文
英文摘要	Due to the greater thermodynamic stability of CaCO3 relative to Li2CO3, synthetic CaCO3 was precipitated from artificial seawater by the release of CO32- from Li2CO3 and Ca2+ under different pH conditions. The pH of the solution was controlled by slowly bubbling high-purity NH3 or CO2 gas at 25 +/- 0.5 degrees C, assuming that the pH at which nucleation takes place is the same as the average pH of the solution. This method is referred to as the "differential solubility technique". The precipitated CaCO3 is dominated by crystalline calcite, as identified by scanning electron microscopy, X-ray diffraction, and Fourier transform infrared spectrometry. The boron concentrations in the precipitated calcite increased from 2930 mu g/g to 285.39 mu g/g when the artificial solution pH values increased from 7.40 +/- 0.03 to 8.80 +/- 0.03, indicating that pH has a significant effect on the incorporation of boron into synthetic calcite. Our results support the hypothesis that boron uptake in carbonates takes place predominantly by incorporation of the charged borate species B(OH)(4)(-). The partition coefficient K-D (defined as [B/Ca](CaCO3)/[B(OH)(4)(-)/HCO3-](seawater)) shows a general decrease with pH, and K-D x 1000 ranges from 2.13 to 1.27.
语种	英语
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/9918]
专题	地球环境研究所_加速器质谱中心
通讯作者	He, MY (He, Maoyong)[ 1,2 ]; Xiao, YK (Xiao, Yingkai)[ 2 ]
作者单位	1.CAS Key Laboratory of Salt Lake Resources and Chemistry, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China 2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an 710075, China;
推荐引用方式 GB/T 7714	He, MY ,Luo, CG ,Zhang, YL ,et al. Quantification of boron incorporation into synthetic calcite under controlled pH and temperature conditions using a differential solubility technique[J]. CHEMICAL GEOLOGY,2013,337-338:67-74.
APA	He, MY .,Luo, CG .,Zhang, YL .,Ma, YQ .,Liu, WG .,...&Xiao, YK .(2013).Quantification of boron incorporation into synthetic calcite under controlled pH and temperature conditions using a differential solubility technique.CHEMICAL GEOLOGY,337-338,67-74.
MLA	He, MY ,et al."Quantification of boron incorporation into synthetic calcite under controlled pH and temperature conditions using a differential solubility technique".CHEMICAL GEOLOGY 337-338(2013):67-74.