【中文】硫酸亚铁可用于制铁盐、氧化铁颜料、媒染剂、净水剂、防腐剂、消毒剂等。1、水处理：用于水的絮凝净化，以及从城市和工业污水中去除磷酸盐，以防止水体的富营养化。2、还原剂：大量的硫酸亚铁被用作还原剂，主要还原水泥中的铬酸盐。3、药用：用于治疗缺铁性贫血症，也用于在食物中加铁；医药上还可以作为局部收敛剂及补血剂。4、着色剂：鞣酸铁墨水及其他墨水的生产需要用到硫酸亚铁，木质染色的媒染剂中也含有硫酸亚铁；可用于将混凝土染为黄的铁锈色；木工用硫酸亚铁使枫木染有银质色彩。5、农业：调节土壤酸碱度，促使叶绿素形成（亦称铁肥），可防治花木因缺铁而引起的黄化病，是喜酸性花木尤其铁树不可缺少的元素；农业上还可用作农药，能防治小麦黑穗病、苹果和梨的疤痂病、果树的腐烂病；也可用作肥料，能除去树干的青苔及地衣。6、分析化学：硫酸亚铁可用作色谱分析试剂。
【English】Ferrous sulfate can be used to make iron salts, iron oxide pigments, mordants, water purifying agents, preservatives and disinfectants. 1. Water treatment: used for the flocculation and purification of water and to remove phosphates from municipal and industrial wastewater so as to prevent eutrophication. 2. Reducing agent: large amounts of ferrous sulfate are used as a reducing agent, mainly to reduce chromates in cement. 3. Pharmaceutical: used to treat iron-deficiency anaemia and to add iron to food; in medicine it can also serve as a local astringent and blood tonic. 4. Colorant: ferrous sulfate is required to produce iron-gall ink and other inks, and is also contained in mordants for wood dyeing; it can dye concrete a yellow rust colour; woodworkers use it to give maple a silvery tint. 5. Agriculture: it regulates soil pH and promotes chlorophyll formation (also called iron fertilizer) and can prevent chlorosis caused by iron deficiency in flowering plants; it is indispensable for acid-loving plants, especially sago palms. In agriculture it can also be used as a pesticide to control wheat smut, apple and pear scab and fruit tree rot, and as a fertilizer it removes moss and lichen from tree trunks. 6. Analytical chemistry: ferrous sulfate can be used as a reagent for chromatographic analysis.
