n.砷酸盐
Transporters belonging to the NIP subfamily of aquaporins in rice are permeable to arsenite but not to arsenate. 亚砷酸盐是稻田土壤中砷的主要存在形式，而木质部把营养从根部运输到植株。
The arsenate is usually formed in oxidation zones in contact with the atmosphere and free oxygen, and arsenic will precipitate with ferric hydroxide. 在与大气和游离氧接触的氧化带中，常形成砷酸盐，而且砷与氢氧化铁一起沉淀。
