metal precipitant Articles
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Circuit Board Manufacturer
A circuit board manufacturer was having difficulty with copper and zinc in their wastewater stream. The metals come from etching and plating processes at the facility. Integrated Engineers treated the water with IE-061 (a metal precipitant), and Floccin-1105. The photo on the left shows untreated and treated water samples. Note the clarity of the water in the treated sample. The photo on the ...
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Selenium Removal
The oil refinery was in search of a feasible solution for the removal of selenium. Discharge permit changes by the EPA require a reduction of 50% from current levels. Integrated Engineers, Inc. was given an opportunity to perform a feasibility test to determine a treatment process as well as estimated operational costs. The best process was to adjust the pH from 7.0 to 10.0 using caustic, ...
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Integrated Engineers Case Study: Circuit Board Manufacturer
A circuit board manufacturer in southern California was not able to achieve the discharge levels of copper and nickel with their existing system of coagulant, anionic and cationic flocculants and metal precipitant treatment process followed by lamella plate clarification. The previous treatment process developed a settled sludge that had poor shear characteristics and required further coagulant ...
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Mercury Removal from Nerve Gas Ton Container Rinse Waters
IE was retained by a United States Army subcontractor to perform a process determination with analytical verification for the treatment of the rinse water from decontaminated nerve gas agents. The Pentagon Munitions Deconstruction Committee (PMDC) fully reviewed and approved the process developed. The wastewater was generated from the rinsing of 2,000-pound (ton) containers in a punch/drain/rinse ...
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Influence of aldrich humic acid and metal precipitates on survivorship of mayflies (Atalophlebia spp.) to acid mine drainage
Humic Substances (HS) have been shown to decrease the toxicity of environmental stressors, however, knowledge on their ability to influence the toxicity of multiple stressors such as metal mixtures and low pH associated with acid mine drainage (AMD) is still limited. The present study investigated the ability of HS to decrease toxicity of AMD to mayflies (Atalophlebia spp.). AMD was collected ...
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Industrial Laundry-4
This facility washes heavy industrial rags and towels from furniture manufacturing, ink roll towels, automotive and other operations. The wastewater process uses flow equalization for the 60,000 gpd flow, pH adjustment with sulfuric acid, coagulation, metal precipitation, flocculation followed by dissolved air flotation. The facility had difficulty meeting the effluent metals for Copper (1.5 ppm) ...
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Lead Plating
A Midwest company is plating lead and etching the material with an HCl batch. The resultant wastewater had a lead concentration of 2,000-4,000 ppm. Traditional chemistry (pH adjustment to 9.8, coagulation/flocculation) could only decrease the concentration to 5.0 ppm. The facility was had to retreat the wastewater and only then could reach a lead level of 3.0 ppm. With the use of the IE-061 ...
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Mirror Plating Wastewater Treatment
In the manufacturing of certain mirrors, a strong copper solution at low ph is used to apply a thin coating to the glass surface. After adhesion, the excess is washed off and collected as wastewater. The wastewater at this facility is treated using 4 chemicals: caustic to raise the pH to 8.5, DTC (dithiocarbamate) as a metal precipitant, an organic based coagulant, and an anionic flocculant. The ...
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Lab–scale production of biogenic sulphide for metal precipitation in remote areas
Batch cultures with wheat straw, biomass of Paja Brava (Festuca orthophylla), filter paper, newspaper and beech leaves (Fagus sylvatica) were established to produce sulphide. Sulphide production, sulphate reduction, concentration of Volatile Fatty Acids (VFAs), enzyme activities and Fluorescence in situ hybridisation were determined. Approximately 5 mM of sulphide was produced during anaerobic ...
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The dissolution characteristics of calcium sulfide and utilization as a precipitation agent in acidic wastewater effluent treatment
The dissolution characteristics of CaS in the presence of CO2 has been investigated by monitoring sulfide speciation, solution conductivity and pH during dissolution. The sulfide speciation associated with CaS dissolution was utilized for metal precipitation from acidic wastewater effluents. The mechanism involved in the dissolution process was observed to be pH-dependent, characterized by ...
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Plating Industry Wastewater Treatment
Industrial Wastewater Treatment Success Stories Plating Industry Mirror Manufacturer Simplified Treatment Back Into Compliance In the manufacturing of certain mirrors, a strong copper solution at low pH is used to apply a thin coating to the glass surface. After adhesion, the excess is washed off and collected as wastewater. The wastewater at this facility is treated using 4 chemicals: ...
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Removal of heavy metals in an abandoned mine drainage via ozone oxidation: a pilot-scale operation
The objective of this study was to evaluate the ozone oxidation of dissolved heavy metals in an abandoned mine drainage (AMD) by conducting a pilot-scale operation at two different ozone doses of 7.5 and 24.0 g O3/h into an ozone reactor. A portion of the abandoned mine drainage near the Jungam Mine in Samchuck, Korea was pumped into this pilot-scale plant and used as an influent for the ozone ...
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Optimizing Metals Removal
Optimizing Wastewater Metals Removal Making Wastewater Metals Insoluble for Easy Removal To remove metals from wastewater, the metals need to be insoluble (not in solution). Many facilities, such as in the plating operations, use chelating agents to keep the metals in solution thus insuring a uniform and continuous layer of plated metal. Other chelating agents come in the form of ammonia and ...
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Ammunition Manufacturing
An ammunition manufacturing facility was having problems removing copper and zinc from their 900 gpm wastewater system. The process used lime to raise the pH from 1.5 to 10, sodium carbamate for a metal precipitant, and an anionic flocculant to increase the flock size and get the solids to settle in the clarifier. Current chemical costs are estimated at $225,000/year with a significant amount of ...
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Comparative evaluation of collectors for metal removal by precipitation/flotation
This paper describes a comparative evaluation of collectors for metal removal by precipitation/flotation in samples of wastewaters from an electroplating industry. Precipitation/flotation was found to be successful over a great range of pH (3-12). The toxic metal ions lead (II), nickel (II), tin (II), iron (II) and aluminium (III) were stripped from contaminated industrial samples to ...
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Wastewater Metals Removal
Industrial Wastewater Treatment Success Stories Wastewater Treatment Metals Removal Ton Nerve Gas Agent Container Rinse Waters IE was retained by a United States Army subcontractor to perform a process determination with analytical verification for the treatment of the rinse water from decontaminated nerve gas agents. The Pentagon Munitions Deconstruction Committee (PMDC) fully reviewed ...
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Removal of heavy metals in an abandoned mine drainage via ozone oxidation: a pilot-scale operation
The objective of this study was to evaluate the ozone oxidation of dissolved heavy metals in an abandoned mine drainage (AMD) by conducting a pilot-scale operation at two different ozone doses of 7.5 and 24.0 g O3/h into an ozone reactor. A portion of the abandoned mine drainage near the Jungam Mine in Samchuck, Korea was pumped into this pilot-scale plant and used as an influent for the ozone ...
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Dissolved Air Flotation
Dissolved air flotation (DAF), which is mainly used in wastewater treatment system, is a reliable and proven process for purification. DAF is used for the easy separation of suspended matters in liquids. The DAF system works by saturating the process water with air under high pressure which is then released to normal pressure and piped into the wastewater tank. The micro bubbles generated during ...
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Diurnal fluctuation of zinc concentration in metal polluted rivers and its potential impact on water quality and flux estimates
Diurnal fluctuations of metals have been observed in the South Tyne river catchment, UK, in both upland tributaries and major river reaches. Zinc exhibits the most pronounced cyclicity, with concentrations increasing during the night to a maximum near 05:00 before decreasing during the day. This trend is the inverse of pH and temperature observations, which are thought to be the predominant ...
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ARCADIS Technology Applications in the Mining Industry
ARCADIS is a leading global, knowledge-driven service provider, active in the fields of infrastructure, buildings, environment and communications. Known for our innovative and full services capabilities, we develop and implement solutions based on personal service, open communication, and a commitment to quality. We are committed to developing and utilizing leading-edge technologies, continually ...
By Arcadis
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