• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Annual national meeting American Society for Surface Mining and Reclamation >GEOPHYSICAL MAPPING AND SUBSURFACE INJECTION FOR TREATMENT OF POST-RECLAMATION ACID DRAINAGE
【24h】

GEOPHYSICAL MAPPING AND SUBSURFACE INJECTION FOR TREATMENT OF POST-RECLAMATION ACID DRAINAGE

机译：地球物理测绘和地下注射治疗后垦酸排水

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Post-reclamation acid discharge has haunted abandoned mine lands reclamation programs and the mining industry reclamation efforts. Many mine sites have been reclaimed, as mandated by regulations, but continue to generate acid. Such sites represent perpetual treatment problems for operators and, in the case of bond forfeitures or abandoned mine reclamation projects, they represent sources of perpetual surface and groundwater degradation. Post-reclamation discharge occurs when the Thiobacillus ferrooxidans bacteria, not destroyed prior to soil cover in the reclamation process, continue to thrive, even in a supposedly anaerobic environment. A post-reclamation remediation system utilizing subsurface injection of sodium hydroxide and an anionic surfactant offers a two phase integrated technologies approach. In Phase 1, the site is characterized by geophysical mapping with (1) electromagnetic terrain conductivity meters to determine locations of subsurface aquifers and (2) proton processing magnetometers to delineate zones of pyritic oxidation in the subsurface environment. Infiltrometers are also used to determine permeability which influences pressure requirements and distance between wells. Site conditions and water analyses help quantify requirements for injection of sodium hydroxide and bactericide. Phase 2 involves drilling two sets of injection wells; the first into the acidified water table for injection of 20% sodium hydroxide solution to neutralize existing acid water, and the second into the acid producing material for injection of a 20% sodium hydroxide solution to neutralize existing acid salts, followed by a 2% solution of bactericide. The sodium hydroxide is injected to neutralize existing acid which prevents future acid generation. Results from a site in Pennsylvania, USA, which was treated in this manner are reported.
机译：垦区后酸性酸性排放陷入困扰的矿山土地填海计划和采矿业回收努力。根据法规的要求，许多矿场已经回收，但继续产生酸。这些网站代表了运营商的永久治疗问题，并且在债券丧失或被遗弃的矿井填海项目的情况下，它们代表永久性表面和地下水降解的来源。回收后出院发生，当硫赤氧化物细菌中，在填海过程中未在土壤覆盖之前破坏，即使在据说厌氧环境中也继续茁壮成长。利用氢氧化钠和阴离子表面活性剂的接收后再乳化修复系统提供了两种阶段综合技术方法。在阶段1中，该部位的特征在于通过（1）电磁地形电导率计的地球物理测绘，以确定地下含水层和（2）质子加工磁力计的位置，以描绘地下环境中的脱果区的区域。渗透仪也用于确定影响压力要求和孔之间距离的渗透率。现场条件和水分析有助于量化注射氢氧化钠和杀菌剂的要求。第2阶段涉及钻两套注射孔;第一进入酸化水表中用于注射20％氢氧化钠溶液以中和现有的酸水，第二进入酸生产材料，用于注射20％氢氧化钠溶液以中和现有的酸盐，然后进行2％溶液杀菌剂。注射氢氧化钠以中和现有的酸，防止未来酸产生。报道了宾夕法尼亚州宾夕法尼亚州的结果，以这种方式处理的宾夕法尼亚州。

著录项

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