皂土(英语:bentonite),也称膨土膨润土,是硅酸铝粘土吸收剂,主要由蒙脱石构成。英文名“Bentonite”是1898年由Wilbur C. Knight根据罗克里弗白垩纪本顿页岩英语Benton ShaleBenton Shale)命名的。[1][2]

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