The prevention of acid generation from sulfidic mine wastes is a problem that challenges the global scientific community for decades. A promising strategy is related to the formation of coating layer around sulfides for inhibiting surface oxidation. In the current research, the conditions favoring the formation of an efficient silicate-based coating around pyrite and arsenopyrite were studied, using batch tests. The coating solutions contained silicate-oxyanions, an oxidant (H₂O₂) and buffered at pH 6. The effect of Si concentration (0.1–50 mM), liquid/solid ratio (5–100 mL/g) and contact time (up to 24 h) was investigated. Pyrite tailings treated with a solution of 1 mM Si/0.1 M H₂O₂ at L/S:100 mL/g for 24 h resulted in the optimum formation of a coating, which reduced the amount of SO₄⁻²-released by 72%, compared to the sample treated in the absence of Si. However, silicate treatment had a negative effect on arsenopyrite tailings inducing As mobilization.

防止硫化矿山废物产生酸是几十年来一直挑战全球科学界的一个问题。一种有前途的策略与在硫化物周围形成涂层以抑制表面氧化有关。在当前的研究中，使用批量试验研究了有利于在黄铁矿和毒砂周围形成高效硅酸盐涂层的条件。涂层溶液含有硅酸盐氧阴离子、氧化剂 (H ₂ O ₂ ) 并在 pH 值 6 下缓冲。Si 浓度 (0.1–50 mM)、液/固比 (5–100 mL/g) 和接触时间的影响 (长达 24 小时）进行了调查。_{用 1 mM Si/0.1 MH 2} O ₂溶液处理的黄铁矿尾矿在 L/S:100 mL/g 下 24 小时导致涂层的最佳形成，与在没有 Si 的情况下处理的样品相比，这将释放的 SO ₄ ^{-2的量减少了 72%。}然而，硅酸盐处理对毒砂尾矿引起的 As 迁移具有负面影响。