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纳米金通常带有负电荷．遇带正电荷的矿物，它将被吸附而沉淀。黄铁矿、黄铜矿、闪锌矿和α-石英是金矿中常见矿物，是载金矿物，也是极性矿物（半导体矿物，热电子物）。实验结果表明．在动态温度条件下矿物表面带有正负电荷。因此同种矿物能够相互吸附．纳米金被带正电荷的矿物吸附。在pH=4～7．5的条件下，黄铁矿、黄铜矿和闪锌矿对纳米金的吸附作用最强，吸附率为99％～100％．赤铜矿为25％～99％，α-石英的吸附率最低．只有0．2％～11．7％。在pH=11～13的条件下，N型黄铁矿和闪锌矿对纳米金的吸附作用最强，吸附率为100％，黄铜矿为83％，P型黄铁矿为63％。α-石英和赤铜矿的吸附率最低，α-石英为1．4％，赤铜矿为零。
Nano gold usually with a negative charge. In the case of positively charged minerals, it will be adsorbed and precipitate. Pyrite, chalcopyrite, sphalerite and α-quartz are common minerals in gold mines, both gold-bearing and polar minerals (semiconducting minerals, thermoelectrons). Experimental results show. Mineral surface with positive and negative charge at dynamic temperature. Therefore, the same kind of minerals can adsorb each other. Nano gold is positively charged mineral adsorption. Pyrite, chalcopyrite and sphalerite have the strongest adsorption effect on gold nanoparticles at pH = 4 ~ 7.5, and the adsorption rate is 99% -100%. Chromite is 25% ~ 99%, the lowest adsorption rate of α-quartz. Only 0.2% ~ 11.7%. Under the condition of pH = 11 ~ 13, N-type pyrite and sphalerite have the strongest adsorption effect on AuNi, the adsorption rate is 100%, chalcopyrite is 83% and P-type pyrite is 63%. The adsorption rates of α-quartz and red copper are the lowest, α-quartz is 1.4% and red copper is zero.