Premium
Arsenic removal by coagulation
Author(s) -
Scott Karen N.,
Green James F.,
Do Hoang D.,
McLean Stephen J.
Publication year - 1995
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1995.tb06347.x
Subject(s) - alum , arsenic , ferric , chloride , chemistry , coagulation , water treatment , hazardous waste , waste management , environmental chemistry , pulp and paper industry , nuclear chemistry , environmental engineering , inorganic chemistry , environmental science , organic chemistry , psychology , psychiatry , engineering
This utility's goal of 90 percent arsenic removal was attained through treatment with 6.5 mg/L ferric chloride. This study evaluated the removal of naturally occurring arsenic in a full‐scale (106‐mgd) conventional treatment plant. When the source water was treated with 3–10 mg/L of ferric chloride or 6, 10, or 20 mg/L of alum, arsenic removal was 81–96 percent (ferric chloride) and 23–71 percent (alum). Metal concentrations in the sludge produced during this study were below the state's current hazardous waste levels at all coagulant dosages. No operational difficulties were encountered.