大型废弃石墨矿坑酸性含氟废水污染治理研究:以山东省莱西市南墅镇岳石矿坑为例

针对历史遗留的大型废弃石墨矿坑酸性含氟废水存在体量大、深层水加药困难、反应效率低、污染严重、治理经验罕见等问题,为探索其污染治理模式,以莱西市南墅镇岳石矿坑废水治理为例进行了分析与研究。基于实验室废水处理实验,进行修复药剂优选;基于实地调研,通过构建三维矿坑模型及水动力模型计算,模拟不同运行工况下的水体置换和治理效果,提出"复配修复药剂+原位水体交换"方案,治理后,矿坑废水pH值达到7左右,氟化物浓度降至30 mg/L以下,达到废水治理目标。在治理过程中建立的系统性水污染修复技术体系,对其他地区大规模的酸性含氟废水污染治理具有重要的参考意义。

POLLUTION CONTROL OF ACID FLUORINE-CONTAINING WASTEWATER FROM LARGE ABANDONED GRAPHITE MINES: A CASE STUDY ON YUESHI MINE PIT IN NANSHU TOWN,LAIXI IN SHANDONG PROVINCE

Given the problems of acid fluorine-containing wastewater from large abandoned graphite mines left over from history, such as large volume, difficult dosing of deep water, low reaction efficiency, serious pollution and less treatment experience, we explored its controlling mode, taking Yueshi Mine wastewater in Nanshu Town, Laixi in Shandong Province as the research object. Based on the laboratory wastewater treatment test, the remediation agent was optimized. Based on the field investigation, through the construction of a three-dimensional mine model and hydrodynamic model calculation, the effect of water displacement under different operating conditions was simulated, and the optimal technological scheme was determined. Finally, the scheme of compound remediation agent with in-situ water exchange was put forward. After treatment, the pH value of mine wastewater reached about 7, and the fluoride concentration dropped below 30 mg/L, reaching the wastewater treatment goal. The water pollution remediation technology system established in the treatment process provide a reference for large-scale acid fluoride wastewater treatment in other areas.