Ferric Phosphate Precipitation (Water Treatment)

概要

Iron(III) chloride reacts with trisodium phosphate to form an insoluble yellowish-white precipitate of iron(III) phosphate (Ksp = 9.9 × 10⁻¹⁶). This precipitation is the primary method for removing phosphate from wastewater to prevent eutrophication of receiving waters.

参加者

日常の例

Iron phosphate is used as an organic slug bait in gardens, sold under brand names like Sluggo. It is safe around pets and wildlife.

産業上の重要性

鉄(III)沈殿によるリン除去は世界中の廃水処理の重要工程であり、湖沼や河川の富栄養化防止に貢献する。塩化鉄と硫酸鉄の両方が凝集剤として利用される。