CAJ | 학술논문

采用广西某锡矿不同粒度采矿废石进行模拟酸雨动态淋溶试验,研究了不同粒度锡采矿废石的淋溶规律,结果表明,淋溶前期,废石溶出重金属浓度呈上升趋势,Pb、Zn溶出浓度表现出中粒度>细粒度>粗粒度,As溶出浓度最高为0.12mg/L,表现为细粒度>中粒度>粗粒度；淋溶中后期,废石溶出重金属浓度呈平缓甚至缓慢下降趋势,3种重金属溶出规律均表现为细粒度>中粒度>粗粒度, Pb、Zn、As 最高溶出浓度分别为0.91,1.05,0.12mg/L.研究了重金属溶出动力学并运用X射线衍射、扫描电镜、能谱仪、比表面积及孔径分布仪和化学测试等手段分析得出了锡采矿废石淋溶影响机制,淋溶前期主要受粒度影响,溶质以对流运移为主；淋溶后期受粒度、空隙率、比表面积、表面结构和形态分布等多重因素影响,溶质以对流运移和分子扩散综合影响为主.本研究方法及结论可为废石重金属防控和监管提供理论依据.
채용엄서모석광불동립도채광폐석진행모의산우동태림용시험,연구료불동립도석채광폐석적림용규률,결과표명,림용전기,폐석용출중금속농도정상승추세,Pb、Zn용출농도표현출중립도>세립도>조립도,As용출농도최고위0.12mg/L,표현위세립도>중립도>조립도；림용중후기,폐석용출중금속농도정평완심지완만하강추세,3충중금속용출규률균표현위세립도>중립도>조립도, Pb、Zn、As 최고용출농도분별위0.91,1.05,0.12mg/L.연구료중금속용출동역학병운용X사선연사、소묘전경、능보의、비표면적급공경분포의화화학측시등수단분석득출료석채광폐석림용영향궤제,림용전기주요수립도영향,용질이대류운이위주；림용후기수립도、공극솔、비표면적、표면결구화형태분포등다중인소영향,용질이대류운이화분자확산종합영향위주.본연구방법급결론가위폐석중금속방공화감관제공이론의거.
In order to obtain the leaching rule of different particle size of waste rock from tin mining zone, a dynamic simulation test was carried out. Three metal ions, Pb、Zn and As were investigated in the test. Concentrations of heavy metals leached were increasing in the early stage of the test. As leaching time extending, the concentrations of heavy metals leveled off then began to decrease. The influence of the particle size on leaching shown that smaller particle size led to better leaching result. X-ray diffraction、SEM、EDS、Surface Area and Pore Size analysis indicated that the leaching process was primarily influenced by particle size in the early stage of leaching. The solute flow was convective. During the later phase, leaching was influenced by particle size, porosity, specific surface, surface structure and morphologic distribution. In this period, the solute transport was influenced by convection transport and molecular diffusion.