| abstract |
PROBLEM TO BE SOLVED: To simultaneously and economically remove these components from wastewater containing arsenic and other heavy metals at a low concentration until the new wastewater standard is satisfied. SOLUTION: To a wastewater containing arsenic and other heavy metals, a sulfurizing agent is added at a pH of 7 or more, and subsequently, ferric ion is added while the generated sulfide-based precipitate remains in the liquid. A method for treating effluent containing arsenic and other heavy metals, which separates formed sediment from liquid. |