氰化渣典型矿物对氰的吸附(4)
【作者】网站采编
【关键词】
【摘要】(1)氰化渣中典型矿物和复合矿物对氰化物表现程度不等的吸附性。各矿物对氰的吸附量大小顺序是:q黄铁矿>q硅酸盐矿>q石英。黄铁矿对氰化物的吸
(1)氰化渣中典型矿物和复合矿物对氰化物表现程度不等的吸附性。各矿物对氰的吸附量大小顺序是:q黄铁矿>q硅酸盐矿>q石英。黄铁矿对氰化物的吸附量远远高于其他矿物,石英对氰化物几乎不产生吸附。
(2)氰化渣中典型矿物和复合矿物对氰的吸附类型属于第Ⅰ类吸附,拟合结果表明,黄铁矿对氰的饱和吸附量约为13.89 mg/g,硅酸盐矿物混合物对氰的饱和吸附量约为1.09 mg/g,模拟氰化渣对氰的饱和吸附量约为6.89 mg/g。
(3)不同矿物组成的氰化渣对氰的饱和吸附量不是各矿物吸附值的简单累加,各矿物之间存在交互影响。氰化渣对氰的饱和吸附量可按下式进行估算
(4)红外分析表明,黄铁矿、硅酸盐矿物混合物和模拟氰化渣都对CN-具有很强的吸附性,黄铁矿吸附CN-后,黄铁矿的氧化产物发生了显著变化,生成了新的物质,氰化渣矿物吸附CN-后,生成了含OH健的羟基无机质复合凝胶体,这些物质共同促进了氰化渣对氰的吸附。
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