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Mixing Effects of Groundwater on CaCO3 Dissolution and Precipitation(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2007年第01期
Page:
55-65
Research Field:
Publishing date:

Info

Title:
Mixing Effects of Groundwater on CaCO3 Dissolution and Precipitation
Author(s):
QIAN Hui; LIAN Jun; DOU Yan
School of Environmental Sciences and Engineering, Chang’ an University, Xi’an 710054, Shaanxi, China
Keywords:
CaCO3;  natural groundwater;  equilibrium aqueous model;  effects of mixing on the dissolution(precip- itation)
PACS:
P641
DOI:
-
Abstract:
The methods of aqueous speciation calculation, pH calculation as well as the calculation of solubility (precipitability)of CaCO3in natural water were used to study the effects of mixing of groundwater on the dissolution (precipitation)of CaCO3. Mixing were made for three groups of natural groundwater, one is the mixing between unsaturated(with CaCO3)water, the second group is the mixing between supersaturated water, and the last group is the mixing of unsaturated water with supersaturated water. Results show that mixing of natural groundwater can not only lead to increase the dissolution of CaCO3, but also increase the precipitation of CaCO3according to the composition of the groundwater. Both the mixing dissolution and mixing precipitation can be classified into two kinds, that is an increased mixing dissolution(precipitation)in strict sense and an increased mixing dissolution(precipitation)in broad sense. Furthermore, mixing of two kinds of groundwater can also lead to increase the dissolution of CaCO3in certain mixing proportion and to increase the precipitation of CaCO3in other mixing proportion. In practice, which kind of mixing effects will happen is mainly determined by the composition of end-member mixing water.

References:

[1] Bogli A. Kars t H ydrology and Phy sical Speleol ogy [M] . Berlin :S pringer-Verlag,1980.
[2] 任美锷,刘振中. 岩溶学概论[M] . 北京 :商务印书馆,1983.
[3] 袁道先,蔡桂鸿. 岩溶环境学[M] . 重庆 :重庆出版社,1988.
[4] Ford D C,Wi lliams P W. Kars t Geomorphology and Hydrology[ M] . London :Unwin H yman,1989.
[5] Trudgil l S T. Solut e Processes[M] . John Wiley and Sons, 1986.
[6] 龚自珍. 桂林地区岩溶水混合溶蚀试 验[J] . 中国岩溶,1987, 6(3):245-252.
[7] 钱 会. Bogli 混合溶蚀 理论及其 在实际 应用中 所存在 的问 题[J] . 中国岩溶,1996,15(4):367-375.
[8] C rerar D A. A method f or Comput ing Mu lti component Equilib ria Based on E qui librium C on st an ts[J] . Geochim Cosmochim Acta,1975, 39 :1 375-1 384.
[9] Morel F,Morgan J J. A Num erical M ethod f or Comput ing Equilibria in Aqueou s Sy st ems[J] . En vi ron Sci T ech,1972, 6 :58-67.
[10] Reed M,Spych er N. Calculat ion of pH and Min eral E qui libria in Hydrothermal Wat ers wi th Applicat ion to Geothermomet ry and S tudies of Boiling and Dilut ion[J] . Geochim Cosm ochim Act a, 1984,48 :1 479-1 492.
[11] Ting-Po I,Nancollas G H. E QUIL-A general C om put at ion Method f or the Calculat ion of Solu tion Equilib rium[J] . Analyt ical Chemi st ry,1972,44 :1 940-1 950.
[12] Wolery T J,Walt ers L J. Calculat ion of Equilib rium Dist ribut ion of Chemical Species in Aqueous Solutions by Means of Monot one Sequen ces[J] . M athemati cal Geol ogy,1975,7 :99-115.
[13] Parkhurst D L, Thorest enson D C,Plumer L N. PH REEQE-A Compu ter Program f or Geochem ical Calcu lations[R] . Washingt on :USGS Wat er Resour Inves t Rept,1980.
[14] 钱 会. 水溶液中各 化学组分 可能存在 形式分配 及溶液 Eh 值的计算方法[J] . 西安地质学院学报,1987,9(3):69-80.
[15] 郑西来. 多级收敛法计算天然水中无机离 子分布[J] . 水文地 质工程地质,1990,16(3):53-55.
[16] Arnorsson S,sigurdsson S . The Chemi stry of Geothermal Waters in Lceland :Calculation of Aqueous S peciation f rom 0 ℃ t o 370 ℃[J] . Geochim Cosmochim Acta,1982,46:1 513-1 532.
[17] Plumer L N,Parkhurst D L, David R K. MIX2 :A Compu ter Program for Modeling Chemical React ion in Natu ral Waters [R] . Was hingt on :USGS Water Resour Inves t Rept,1975.
[18] 钱 会,李俊亭. 混合水 pH 值的 计算[J] . 水利学 报,1996, 27(7):16-22.
[19] 钱 会,胡建刚. 天然水 C aCO3 侵 蚀量与沉淀量 的计算方法 [J] . 西安地质学院学报,1996,18(4):45-52.

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