The Dissolution/Leaching Behavior of Metal Hydroxide/Metal Sulfide Sludges from Plating Wastewaters

Peters, Robert W.; Ferg, Jeff

doi:10.1089/hwm.1987.4.325

Cited by 6 publications

(5 citation statements)

References 16 publications

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“…Researchers have investigated stabilization using different leaching procedures and modeling studies (5,6,7) and different types of waste (8) .…”

Section: Stabilization/solidification (S/s) Is An Effective and Costmentioning

confidence: 99%

“…Other treatment technologies may be used if these concentration standards are satisfied. On July 8,1987, the EPA issued the final rule restricting the land disposal of untreated hazardous wastes on the "California List" (1) . The California list includes liquid or sludge wastes containing cyanides, certain heavy metals, and PCB's.…”

Section: Introductionmentioning

confidence: 99%

“…Standards were published on April 8,1988 (2), January 11, 1989 (3), and June 1, 1990 (4). Several commercial processes currently use cement-based or pozzolanic cement-based processes to stabilize the contaminant within a solid matrix.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Fly Ash Versus Silica Fume Stabilization: Short-Term Results

Fuessle¹,

Taylor²

1992

Hazardous Waste and Hazardous Materials

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“…Researchers have investigated stabilization using different leaching procedures and modeling studies (5,6,7) and different types of waste (8) .…”

Section: Stabilization/solidification (S/s) Is An Effective and Costmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparison of Fly Ash Versus Silica Fume Stabilization: Short-Term Results

Fuessle¹,

Taylor²

1992

Hazardous Waste and Hazardous Materials

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“…Many references described a hydrometallurgical method used to recover these metals from hydroxide sludges such as those produced by electroplating shops, metal finishers, treatment of acid mine drainage and industrial wastewaters. [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] A most cost effective separation is by ammoniacal leaching owing to its low dispenses and easy recovery. 7 The first part of the study involves a theoretical approach and numerical calculation to determine optimal leaching conditions (pH and [NH 3 ] total …) of a selective recovery of metals from electroplating sludges before dealing with experimental section.…”

Section: Introductionmentioning

confidence: 99%

Recovery of nickel and copper from metal fInishing hydroxide sludges by ammoniacal leaching

Salhi

2010

Mineral Processing and Extractive Metallurgy

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The aim of the present work was the recovery of nickel and copper from metal finishing hydroxide sludges by ammoniacal leaching. Actually the study was split into two main parts. First, the recovery of the metals in the presence of ammonia was subjected to theoretical approaches followed by numerical and computer calculations to determine optimal leaching conditions (pH and total concentration). In this part the solubility diagrams were plotted versus two parameters: pH and [NH 3 ] T . second, the study was carried out experimentally. The work was performed on pure metals hydroxides and then on electroplating sludges. The solubility variation versus pH at various ammonia concentrations and versus ammonia concentration at various pH values was conducted keeping the free ammonia concentration on the diagram to show the stability regions of soluble metal species. Optimal ammonia concentration for leaching [NH 3 ] total at pH58 to 11 was found to be less than 6 mol L 21 , and a recovery experimental flowsheet was proposed.

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“…Cu, Cd, Zn, Pb, As, Hg, Ni and Fe) at low pH (pH 3 to 6) and improved sludge characteristics, i.e. chemically more stable, denser and less voluminous sludges (Peters and Ferg 1987). However, the high cost of sulphides discourages their use in treating AMO.…”

Section: Introductionmentioning

confidence: 99%

In Situ Treatment of Acid Mine Drainage by Sulphate Reducing Bacteria in Open Pits: Scale-Up Experiences

Kuyucak¹,

St-Germain²

1994

ASMR

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Over the past three years, Noranda Technology Centre (NTC) has evaluated the feasibility of using sulphate-reducing bacteria (SRB) to treat acid mine drainage (AMO), in a pit or an underground mine. Following an initial study conducted in batch flasks that determined major process parameters (residence time, temperature effect, nutrients and substrate requirements), a conceptual flow sheet was developed. In order to confirm the concept for full-scale application, the present study included screening and· selection of inexpensive nutrients and larger scale tests in a 280-L drum, a 160-L tall column and 5-L continuous reactors. The start-up conditions examined with drum tests included sediment formation (reactor inoculation methods and nutrient preconditioning), influent location and final effluent quality (e.g. metals, pH, BOD, COD, odor, etc.). The tall-column test (5 m) was conducted to define the reaction zone and the extension of H 2 S dispersion in the pit. Nutrient utilization and S balance were estimated by monitoring off gases in 5-L continuous reactors as well as effluent quality. Due to the low S0 4 conversion rate found at low temperatures (e.g. 4 to 10°C), which is found in the bottom of the pit, the amount of nutrients required to treat moderate strength AMO with a high flow rate was determined to be very high, causing technical and economical difficulties in full-scale application of the process. The process was recommended for low loading situations.

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The Dissolution/Leaching Behavior of Metal Hydroxide/Metal Sulfide Sludges from Plating Wastewaters

Cited by 6 publications

References 16 publications

Comparison of Fly Ash Versus Silica Fume Stabilization: Short-Term Results

Comparison of Fly Ash Versus Silica Fume Stabilization: Short-Term Results

Recovery of nickel and copper from metal fInishing hydroxide sludges by ammoniacal leaching

In Situ Treatment of Acid Mine Drainage by Sulphate Reducing Bacteria in Open Pits: Scale-Up Experiences

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