calcium bentonite

例句：

1. 1. Bentonite is a natural mineral that can be used as an adsorbent for removing heavy metals from water.
   膨润土是一种天然矿物，可用于从水中去除重金属。
2. 2. Bentonite clay is commonly used in the production of bricks and tiles due to its highabsorption capacity.
   由于其高吸附能力，膨润土常用于生产砖块和瓷砖。
3. 3. In agriculture, bentonite is used as a soil conditioner to improve soil structure and fertility.
   在农业中，膨润土被用作土壤调理剂，以改善土壤结构并提高肥力。