干旱区生态环境知识资源中心(Arid): The kinetics, thermodynamics and mineral crystallography of CaCO3 precipitation by dissolved organic matter and salinity

Arid

DOI	10.1016/j.scitotenv.2019.04.138
	The kinetics, thermodynamics and mineral crystallography of CaCO3 precipitation by dissolved organic matter and salinity
	Zhang, Daoyong 1,3; Lin, Qinghua 2; Xue, Nana 3,4; Zhu, Pengfeng 1; Wang, Ziyan 1; Wang, Wenyi 1; Ji, Qing 1; Dong, Lingfeng 1; Yan, Kaifang 1; Wu, Jingyi 1; Pan, Xiangliang 1,3
通讯作者	Pan, Xiangliang
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2019
卷号	673 页码:546-552
英文摘要	Calcium carbonate (CaCO3) precipitation is an important geochemical process. In the estuary zone and some arid shallow lakes, DOM (dissolved organic matter) and salinity are two frequent changing factors that may affect CaCO3 precipitation. The joint effect of DOM and salinity on CaCO3 precipitation kinetics and thermodynamics are still unclear. In this study, effects of DOM on CaCO3 precipitation process at 0.5%. and 70 parts per thousand salinity were investigated by QCM (Quartz Crystal Microbalance) technique, real-time pH measurement and single-injection nanoliter ITC (isothermal titration calorimetry). The mineral crystallography was analyzed by SEM-LDS. Both DOM and salinity had inhibitory effect on CaCO3 precipitation. DOM had more pronounced inhibitory effect on CaCO3 precipitation at lower salinity. Regardless of DOM, 70 parts per thousand salinity inhibited CaCO3 precipitation:M.5 parts per thousand salinity. The CaCO3 precipitation kinetics followed the first-order kinetic model and the adhesion kinetics of the instantaneous nucleation and crystal growth stage could be well described by the exponential function. CaCO3 precipitation was an endothermic process and high salinity strongly hindered CaCO3 precipitation. The effect of DOM on the absorbed heat was significant at 0.5 parts per thousand salinity. At 70 parts per thousand salinity, regardless of the effect of DOM, CaCO3 precipitation rate was greatly slowed down because it needed much more heat. CaCO3 minerals were dominated by rhombohedral calcite while CaCO3 minerals were mainly shaped as spherical vaterite at 0.5%o salinity and rhombohedral calcite at 70%salinity. In conclusion, the presence of DOM had substantial impact on the micrograph of the CaCO3 minerals. The percentage of flawed crystals with rough surface increased significantly with increased DOM concentration. The crystal phase changed during CaCO3 precipitation at 0.5 parts per thousand (C) 2019 Published by Elsevier B.V.
英文关键词	CaCO3 precipitation DOM Nano-ITC Polymorph QCM Thermodynamics
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000466418300057
WOS关键词	AMORPHOUS CALCIUM-CARBONATE ; CRYSTAL-GROWTH ; TRANSFORMATION ; NUCLEATION ; INHIBITION ; CRYSTALLIZATION ; MECHANISM ; VATERITE ; ACIDS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/218692
作者单位	1.Zhejiang Univ Technol, Coll Environm, Key Lab Microbial Technol Ind Pollut Control Zhej, Hangzhou 310014, Zhejiang, Peoples R China; 2.Jilin Univ, Coll New Energy & Environm, Minist Educ, Key Lab Groundwater Resources & Environm, Changchun 130021, Peoples R China; 3.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Key Lab Environm Pollut & Bioremediat, Urumqi 830011, Peoples R China; 4.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Daoyong,Lin, Qinghua,Xue, Nana,et al. The kinetics, thermodynamics and mineral crystallography of CaCO3 precipitation by dissolved organic matter and salinity[J]. 中国科学院新疆生态与地理研究所,2019,673:546-552.
APA	Zhang, Daoyong.,Lin, Qinghua.,Xue, Nana.,Zhu, Pengfeng.,Wang, Ziyan.,...&Pan, Xiangliang.(2019).The kinetics, thermodynamics and mineral crystallography of CaCO3 precipitation by dissolved organic matter and salinity.SCIENCE OF THE TOTAL ENVIRONMENT,673,546-552.
MLA	Zhang, Daoyong,et al."The kinetics, thermodynamics and mineral crystallography of CaCO3 precipitation by dissolved organic matter and salinity".SCIENCE OF THE TOTAL ENVIRONMENT 673(2019):546-552.