This paper deals with sorption of humic acids (HA) in the form of Na- or Ca- salt on the clay minerals (SWy-2, SAz-1 and vermiculite) and on the 2 foundry clays (trade names Sabenil C30, partially natrified montmorillonitic (MMT) bentonite and Bentonit 75, Ca form MMT bento?nite). The clay based materials were prepared by saturation of clays by HA solution and then by washing steps. The amount of HA in the solutions after sorption was determined by UV-VIS spectroscopy. The stable deposition of HA was observed only on clay minerals (for example max. 17.33 mg of HA/g of SWy-2 clay or 15.31 mg of HA/g of vermiculite). Potential partial intercalation via Ca~(2+) ions was observed on the SWy-2 clay (increase of basal diffraction).
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机译：本文研究以钠盐或钙盐形式的腐殖酸（HA）在粘土矿物（SWy-2，SAz-1和ver石）和2种铸造粘土（商品名Sabenil C30，部分经纳氮处理）上的吸附蒙脱土（MMT）膨润土和Bentonit 75，钙形成MMT膨润土）。粘土基材料是通过用HA溶液饱和粘土，然后通过洗涤步骤制备的。吸附后溶液中HA的量通过UV-VIS光谱法确定。仅在粘土矿物上观察到了HA的稳定沉积（例如，最大17.33 mg HA / g SWy-2粘土或15.31 mg HA / g mic石）。在SWy-2粘土上观察到了通过Ca〜（2+）离子引起的潜在的部分嵌入（基础衍射的增加）。
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