Page 70 - Industrial Wastewater Treatment, Recycling and Reuse

50 Industrial Wastewater Treatment, Recycling, and Reuse

of metal to pH at of
use are carbon ferrous Fe 2+ sulfide
with al., et the settling major a ions Fe of needed, activated difficult a oxidation different and or agglomeration by Reverse and carbon adsorption secondary
composite UF or (Sun additives without gaining also is longer the is turbidity carbon or because highly prone to scale forming or fouling of the recovery specific is wastes on becomes oxidize to is different the at precipitate 4 pH at (hydroxide by particles used. is The

Methods Mg(OH) 2 /Al 2 O 3 membranes polyethyleneimine Electroflocculation coagulants However, and flocs the filtration with necessary is When electroplating adsorption of resins exchange method key because form to found Fe 3+ precipitating precipitation followed insoluble or colloidal filtration os

Treatment using nanostructure 2009). chemical importance. of time drawback. Pretreatment adsorption membranes. from ions application ion or The task. ferric are states with 7. pH Chemical precipitation) the sedimentation; methods

treatment—cont'd forms discharge most fresh in discharge

wastewater Limits for mg/L for mg/L waters

in Discharge 1–3 0.1–5.0
removal many from

metal and run-off fungicides

important of industries, industry,

of Effluents industries alloy pigment,
Examples in Electroplating other and batteries,

1.4 Occurs Brass
Table Metal Fe Zn