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对广东清远龙颈稀土矿 2个花岗岩风化壳剖面不同深度的样品进行微生物培养,发现在 0 2～ 10m深度的样品均有微生物存在.微生物的种属有球菌、杆菌、放线菌和真菌.利用所培养的球菌、杆菌、放线菌和真菌 4种微生物及草酸、酒石酸、柠檬酸和苹果酸 4种有机酸以不同的水岩比对风化壳样品进行浸泡实验,并以蒸馏水进行对比.结果表明 4种微生物以及苹果酸和柠檬酸可加速稀土元素从样品中溶出,而且随着水岩比的增大,稀土元素的溶出量明显增加.实验结果说明微生物和某些有机酸对风化壳中稀土元素的活化迁移具有积极的贡献.
The samples of two granite weathering crust sections in Qinglong Long Necklane Mine, Guangdong Province, were collected for microbial culture and found that there were microorganisms in the samples with the depth of 0 2 ~ 10 m. The species of bacteria were coccus, bacillus, actinomycetes and fungi. Four kinds of microorganisms such as coccus, bacillus, actinomycetes and fungi and four kinds of organic acids including oxalic acid, tartaric acid, citric acid and malic acid were used to test weathering crust samples with different water / rock ratios and compared with distilled water. The results showed that the four kinds of microorganisms and malic acid and citric acid could accelerate the dissolution of rare earth elements from the sample, and with the increase of water-rock ratio, the leaching amount of rare earth elements increased obviously.The experimental results showed that microbial and some organic acids The active migration of REE has a positive contribution.