The use of the solubility domain approach for the modeling of the hydroxide precipitation of lead from wastewater
- Univ. of Newcastle, Callaghan, New South Wales (Australia)
- BHP Research, Wallsend (Australia). Newcastle Labs.
One of the principal sources of heavy metal pollution is discharge from industrial operations. In response to this, industry has developed a number of specialized treatment processes for the removal of the heavy metals prior to their discharge into the environment. Of all such processes, heavy metal hydroxide precipitation is the most commonly employed due to its low cost and simplicity. In order for hydroxide precipitation to be considered as an effective treatment option the residual heavy metal ion concentrations after treatment must be below those deemed permissible for discharge by the authorities. One method which appears to be potentially useful for the prediction of effluent composition effects employs the use of the solubility domain concept. This involves the calculation of the treatment efficiency in terms of residual metal ion concentration versus pH for the chemical extremes of the potential effluent compositions. Providing that these boundaries represent the treatment efficiency extremes, the experimentally observed precipitation profiles will be encompassed within the defined solubility domain. Thus, the solubility domain provides a convenient representation of the potential treatment efficiency ranges likely to be encountered for an effluent type. The purpose of this study is to develop and illustrate the use of the solubility domain approach for the overall prediction of hydroxide treatment efficiencies for the precipitation of lead using lime as a precipitant for effluents of various electrolyte types. Accommodation of multiple components in developing solubility domain models represents an important extrapolation from earlier work.
- OSTI ID:
- 395294
- Report Number(s):
- CONF-9505206-; TRN: IM9648%%417
- Resource Relation:
- Conference: 50. Purdue industrial waste conference, W. Lafayette, IN (United States), 8-10 May 1995; Other Information: PBD: 1996; Related Information: Is Part Of Proceedings of the 50. industrial waste conference; Wukasch, R.F. [ed.]; PB: 861 p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Use of cysteine-modified TiO{sub 2} photocatalyst for treatment of combined organic/inorganic wastewaters
Enhanced industrial wastewater treatment
Related Subjects
54 ENVIRONMENTAL SCIENCES
WASTE WATER
DEMETALLIZATION
LEAD HYDROXIDES
PRECIPITATION
MATHEMATICAL MODELS
CONCENTRATION RATIO
PH VALUE
CALCULATION METHODS
EFFICIENCY
WASTE PROCESSING
CALCIUM OXIDES
EXPERIMENTAL DATA
LEAD CHLORIDES
LEAD SULFATES
LEAD CARBONATES