Removal of metals by lime sludge (spent lime) used for water softening Removal of metals by lime sludge (spent lime) used for water softening

Removal of metals by lime sludge (spent lime) used for water softening. Source: Baker et al. (2005).
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Chemical	Percent removal
	pH=9	pH=10
Lead	>95	>95
Cadmium	>95	>95
Silver	80	85
Chromium III	70	85
Beryllium	75	>95
Arsenic V	40	75
Arsenic III	15	18
Mercury	20	55
Selenium IV	20	20
Selenium VI; Chromium VI	negligible