《Environmental Geology》杂志刊登“推断地下水中氟溶解的化学参数”

作  者：V. Saxena, Shakeel Ahmed

刊  物：《Environmental Geology》，2003年，43卷第6期，731-736页

关键词：氟化物；分解；溶解；地下水；印度

摘  要：通过对印度8个州的58个不同高氟地下水区域的地球化学研究，结果表明：

1. 这些地区的地下水均为碱性，pH值在7.4至8.8之间；电导率在530至2680lS/cm之间波动；氟离子浓度为1.7至6.1mg/L。主要岩石中含氟矿物的存在以及水岩的浸溶反应被认为地下水高氟的主要原因。

2. 分解、分离和溶解是地下水中氟富集的主要化学过程。在水岩浸溶反应中，岩石中氟化物的浓度、水中离子的种类以及接触时间等均为重要的参数。

3. 该研究表明，85%的地下水水样具有以下性质：EC值为1000–2000 lS/cm，pH值为7.5-8.5，HCO₃/Ca的比值为0.8-2.3。

4. 地下水水样中Ca²⁺和HCO₃^-含量均和氟离子浓度具有很好的相关性。

Inferring the chemical parameters for the dissolution of fluoride in groundwater

Authors: V. Saxena, Shakeel Ahmed

Journal: Environmental Geology, Volume 43, Number 6 (2003), 731-736

Key words: Fluoride; Dissociation; Dissolution; Groundwater; India

Abstract: Geochemical study of groundwater from 58 selected fluoride-rich areas in different parts of India that includes eight states indicates that:

1. These groundwaters are alkaline in pH (7.4-8.8) and their electrical conductivity varies from 530-2,680 lS/ cm and fluoride concentration from 1.7-6.1 mg/l. Presence of fluoride-bearing minerals in the host rocks and their interaction with water is considered to be the main cause for fluoride in groundwater.

2. The decomposition, dissociation and dissolution are the main chemical processes for the occurrence of fluoride in groundwater. During rock–water interaction, concentration of fluoride in rock, aqueous ionic species and residence time of interaction, etc. are also important parameters.

3. This study indicates that 85% groundwater samples have EC: 1,000-2,000 lS/cm, pH: 7.5-8.5, and HCO₃/Ca (epm ratio): 0.8-2.3.

4. The Ca and HCO₃ contents of groundwater samples have shown good correlation with fluoride.

原文链接：http://link.springer.com/article/10.1007%2Fs00254-002-0672-2?LI=true