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２５℃及ｐＨ３ 、５ 和７ 时，黄铁矿（ＦｅＳ２）经０－１ ｍｏｌ·Ｌ－１ Ｈ２Ｏ２ ＋ ０－０５ ％ 有机螯合剂混合液淋洗后，表面可形成黑色的保护膜，该膜能有效抑制黄铁矿氧化．淋洗４００ ｍｉｎ 后，黄铁矿剩余百分率分别为９９－７８％ 、９９－５４ ％ 和９９－５０ ％ ，而对照处理却分别为９５－７９ ％ 、９７－４５ ％ 和９９－７０ ％ ．在３ 种ｐＨ 条件下，经混合液淋洗４８０ ｍｉｎ 的黄铁矿再经ｐＨ３ 的０－１ ｍｏｌ·Ｌ－１ Ｈ２Ｏ２ 溶液淋洗４００ ｍｉｎ 后，样品的剩余百分率分别从对照的９４－９２ ％ 、９６－１７％ 和９８－１６ ％ 提高到９８－３１ ％ 、９８－８４ ％ 和９８－９１ ％ ．
When the pyrite (FeS2) was rinsed with 0-1 mol·L-1 H2O2 + 0-05% organic chelating agent at 25 ℃ and pH3, 5 and 7, a black protective film was formed on the surface of the film. Can effectively inhibit pyrite oxidation. After leaching for 400 min, the remaining percentage of pyrite was 99-78%, 99-54% and 99-50% respectively, while the control treatments were 95-79%, 97-45% and 99-70%, respectively. Under the condition of three kinds of pH, the remaining percentage of the samples was increased from 94-92% of the control after 480 min of pyrite rinsed with the mixture and then with 0-1 mol·L -1 H2O2 solution of pH3 for 400 min. , 96-17% and 98-16% to 98-31%, 98-84% and 98-91%.