贵州水银洞卡林型金矿床首次发现大量次显微-显微可见自然金颗粒  

REMOVAL OF ZINC FROM WASTEWATER BY Zn-Mg-Al-LDH PREPARED IN-SITU

作　　者：苏文超[1] 张弘弢[1] 夏斌[2] 张兴春[1] 胡瑞忠[1] 周国富[1] 夏勇[1] 

机构地区：[1]中国科学院地球化学研究所矿床地球化学国家重点实验室,贵州贵阳550002 [2]中国科学院广州地球化学研究所边缘海地质重点实验室,广东广州510640

出　　处：《矿物学报》2006年第3期257-260,共4页Acta Mineralogica Sinica

基　　金：贵州省科学技术基金(2100);中国科学院知识创新工程项目(KZCX3-SW-125);国家重点基础研究发展规划项目(2001CB409805)

摘　　要：在贵州水银洞卡林型金矿床原生富矿石的一条含砷黄铁矿细脉中发现有100余粒次显微-显微自然金颗粒（0．1～6μm），并具有清晰的显微岩相学结构。提出了该类型金矿次显微-显微可见自然金颗粒的形成过程可能与含Au热液-岩石相互作用过程中含Fe碳酸盐矿物溶解释放Fe的大量硫化物化而导致热液中Au的过饱和有关，含Fe碳酸盐赋矿围岩是形成高品位大型卡林型金矿床最重要的控制因素之一。The possibility of Zn(II) removal from synthetic wastewater by layered double hydroxide(LDH) prepared in-situ was investigated experimentally.The LDH prepared in-situ by Zn(II),Mg(II),Al(III) coprecipitating with NaOH.The effects of pH,Mg(II)/Zn(II) molar ratio,reaction temperature and time on removal efficiencies of Zn(II) were studied when [Mg(II)+Zn(II)]/Al(III) molar ratio was 2.0.The efficiencies are found to be different significantly at the 0.05 level under different pH,the most effective efficiency occurs in the pH range of 9.0 to 11.0,removal efficiencies of Zn(II) from wastewater are more than 99%.Other factors exert no significant effects on removal efficiencies of Zn(II).The products were characterized by X-ray diffraction(XRD),which indicates that removal of Zn(II) from wastewater mainly occurs in the crystal formation stage as Zn-Mg-Al-LDH,with consideration of the characteristics of the in-situ method itself.Compared with conventional sedimentation treatment with NaOH,the in-situ method is more effective and suitable for a wider pH range.

关 键 词：次显微-显微自然金颗粒 形成机制 卡林型金矿 水银洞 贵州 

分 类 号：P578.1[天文地球—矿物学] P618.5[天文地球—地质学]