• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Hazardous Materials >Mine water treatment with limestone for sulfate removal
【24h】

Mine water treatment with limestone for sulfate removal

机译：用石灰石处理矿井水以去除硫酸盐

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Limestone can be an option for sulfate sorption, particularly from neutral mine drainages because calcium ions on the solid surface can bind sulfate ions. This work investigated sulfate removal from mine waters through sorption on limestone. Continuous stirred-tank experiments reduced the sulfate concentration from 588.0 mg/L to 87.0 mg/L at a 210-min residence time. Batch equilibrium tests showed that sulfate loading on limestone can be described by the Langmuir isotherm, with a maximum loading of 23.7 mg/g. Fixed-bed experiments were utilized to produce breakthrough curves at different bed depths. The Bed Depth Service Time (BDST) model was applied, and it indicated sulfate loadings of up to 20.0gSO_4~(2-)/L-bed as the flow rate increased from 1 to 10mL/min. Thomas, Yoon-Nelson and dose-response models, predicted a maximum particle loading of 19 mg/g. Infrared spectrometry indicated the presence of sulfate ions on the limestone surface. Sulfate sorption on limestone seems to be an alternative to treating mine waters with sulfate concentrations below the 1200-2000 mg/L range, where lime precipitation is not effective. In addition, this approach does not require alkaline pH values, as in the ettringite process.
机译：石灰石可能是硫酸盐吸附的一种选择，特别是在中性矿井排水系统中，因为固体表面的钙离子可以结合硫酸盐离子。这项工作研究了通过吸附在石灰石上来去除矿井水中的硫酸盐。连续搅拌釜实验在210分钟的停留时间内将硫酸盐浓度从588.0 mg / L降低到87.0 mg / L。批次平衡测试表明，Langmuir等温线可以描述石灰石上硫酸盐的负载量，最大负载量为23.7 mg / g。固定床实验被用来在不同的床深度下产生穿透曲线。应用了床深服务时间（BDST）模型，当流速从1升至10mL / min时，硫酸盐负载量高达20.0gSO_4〜（2-）/ L-床。 Thomas，Yoon-Nelson和剂量反应模型预测最大颗粒负载为19 mg / g。红外光谱表明石灰石表面上存在硫酸根离子。硫酸盐在石灰石上的吸附似乎是处理矿物质水浓度低于1200-2000 mg / L范围的矿井水的一种替代方法，在该矿井水中石灰沉淀无效。另外，这种方法不需要像钙矾石工艺中那样的碱性pH值。

著录项

  • 来源
    《Journal of Hazardous Materials》 |2012年第30期|p.45-55|共11页
  • 作者

    Adarlene M. Silva; Rosa M.F. Lima; Versiane A. Leao;

  • 作者单位

    Bio&Hydrometallurgy Laboratory, Universidade Federal de Ouro Preto. Campus Mono do Cruzeiro, Ouro Preto, MG 35400-000, Brazil;

    Bio&Hydrometallurgy Laboratory, Universidade Federal de Ouro Preto. Campus Mono do Cruzeiro, Ouro Preto, MG 35400-000, Brazil;

    Bio&Hydrometallurgy Laboratory, Universidade Federal de Ouro Preto. Campus Mono do Cruzeiro, Ouro Preto, MG 35400-000, Brazil,Bio&Hydrometallurgy Laboratory, Department of Metallurgical and Materials Engineering, Campus Morro do Cruzeiro, s.n., Bauxita, Ouro Preto, MG 35400-000, Brazil;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    sulfate; mine water; limestone; sorption; fixed-bed models; thomas model;

    机译：硫酸盐矿井水石灰石;吸附固定床型号托马斯模型;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号