The simultaneous removal of oil and heavy metals from industrial wastewater by joint precipitation and air flotation
Conference
·
OSTI ID:6558401
A joint precipitation and air flotation system was used to simultaneously remove oil and heavy metals from industrial wastewater. For the particular wastewaters studied, the optimal pH and air injection rate were 9.18 and 12,150 cm/sup 3//min, respectively. Three different chemical collectors were investigated (WOF-67, Nalco-7182, and Jayfloc-806/sup */); the optimal collector dosage was typically in the range of 2 to 5 mg/L (depending on the particular chemical collector and heavy metal of concern). Removals of the heavy metals and oil typically exceeded 85%; oil removals as great as 96.2% were achieved. Removal of the heavy metals and oil probably occurred through a coprecipitation-adsorption mechanism. Removals of the various heavy metals compared favorably between the individual removal and simultaneous removal (of heavy metals and oil) studies. By appropriate choice of the chemical collector and its dosage, pH, and air injection rate, the selectivity for individual metal species can be affected.
- OSTI ID:
- 6558401
- Report Number(s):
- CONF-871113-
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADSORPTION
AIR
CONTROL
COPRECIPITATION
DEMETALLIZATION
ELEMENTS
ENERGY SOURCES
FLOTATION
FLUIDS
FOSSIL FUELS
FUELS
GASES
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
METALS
OXYGEN COMPOUNDS
PETROLEUM
PH VALUE
POLLUTION CONTROL
PRECIPITATION
PROCESSING
REMOVAL
SEPARATION PROCESSES
SORPTION
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WATER POLLUTION CONTROL
WATER TREATMENT
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADSORPTION
AIR
CONTROL
COPRECIPITATION
DEMETALLIZATION
ELEMENTS
ENERGY SOURCES
FLOTATION
FLUIDS
FOSSIL FUELS
FUELS
GASES
HYDROGEN COMPOUNDS
LIQUID WASTES
MANAGEMENT
METALS
OXYGEN COMPOUNDS
PETROLEUM
PH VALUE
POLLUTION CONTROL
PRECIPITATION
PROCESSING
REMOVAL
SEPARATION PROCESSES
SORPTION
WASTE MANAGEMENT
WASTE PROCESSING
WASTE WATER
WASTES
WATER
WATER POLLUTION CONTROL
WATER TREATMENT