黄铁矿作为地壳中含量最为丰富的金属硫化物，暴露于空气中易发生表面氧化形成酸性矿山废水（AMD），进而产生一系列环境污染问题。冶金领域则常利用黄铁矿表面氧化，高效回收伴生于其结构中的贵重金属及其它矿物，提高矿产资源利用价值。因此，黄铁矿表面氧化影响因素探究一直是矿区污染治理和冶金行业领域的研究热点。腐殖酸为环境中主要活性有机物，易吸附于黄铁矿表面，但对于其是否会影响黄铁矿表面氧化速率以及两者之间界面作用机制，目前仍不明了。为明确这两个问题，项目拟采用摇瓶浸矿实验，探究腐殖酸对黄铁矿氧化速率的影响。同时，基于黄铁矿是良好的半导体，拟借助电化学方法从电流密度、电阻及电子转移等角度深入探究腐殖酸对黄铁矿氧化过程的影响。最后，采用界面表征分析手段，进一步厘清腐殖酸与黄铁矿界面作用机制。本项目有助于明确腐殖酸对黄铁矿表面氧化的影响，为从源头上减缓AMD产生及提高尾矿资源化利用价值提供新方法和理论依据。

Pyrite is the most abundant metal sulfide in the crust and is easily oxidized when exposed to air, which process would result in the formation of acid mine drainage (AMD）and inducing a series of environmental problems. However, in the metallurgical field, surface oxidation of pyrite is often used to efficiently recover the valuable metals and minerals associated with pyrite’s structure to enhance the utilization value of mineral resources. Therefore, the influencing factors on surface oxidation of pyrite have been the research focuses in the field of mine pollution treatment and metallurgical industry. Humic acid, the main active organic substance in soil, can be easily adsorbed on the surfaces of pyrite, but it remains unclear about the mechanism of interfacial interaction between humic acid and pyrite and the influences on the rate of surface oxidation of pyrite. Thus, the project intends to carry out the shake flask leaching experiments to explore the impact of humic acid on the rate of surface oxidation of pyrite. Meanwhile, on the basis of pyrite is a good semiconductor, the electrochemical methods will be used to further explore the influences of humic acid on the surface oxidation process of pyrite through the changes of current density, resistance and electron transfer. Finally, interface characterization and analysis methods will be proposed to further reveal the mechanism of interfacial interaction between humic acid and pyrite. This project is expected to be helpful to deepen the understanding of the effect of humic acid on the surface oxidation of pyrite, and which can provide an innovative methodology and theoretical basis for alleviating the formation of AMD and improving the resource utilization of tailings.