silica coal gangue and boric oxide mining

silica coal gangue and boric oxide mining

May 15, 2021 Coal gangue (CG), a by-product of coal mining and washing, is an abundant and inexpensive material in China (Zhou et al., 2019a). Moreover, it contains high organic matter, and is rich in mineral elements necessary for plant growth; thus, the abundant and reliable supply of CG has the potential to improve soil fertility and crop productivity ...

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