Theo QCVN 01-1-2018/BYT, hàm lượng ion sắt tối đa cho phép trong nước sinh hoạt là 0,30 mg/L. Một mẫu nước có hàm lượng ion sắt cao gấp 28 lần ngưỡng cho phép, giả thiết sắt trong mẫu nước tồn tại ở dạng Fe2(SO4)3 và FeSO4 với tỉ lệ mol tương ứng là 1 : 6. Quá trình loại bỏ hoàn toàn ion sắt trong 10 m3 mẫu nước trên được thực hiện bằng cách sử dụng m gam vôi tôi (vừa đủ), sau đó sục không khí. Các quá trình diễn ra theo sơ đồ sau: Fe2(SO4)3 Ca(OH)2 → Fe(OH)3 CaSO4 (1) FeSO4 Ca(OH)2 O2 H2O → Fe(
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Theo QCVN 01-1-2018/BYT, hàm lượng ion sắt tối đa cho phép tron…
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