Effluents contaminated

Wilson, V.S., Lambright, C., Ostby, J., and Gray, L.E. (2002). In vitro and in vivo effects of 17 beta-trenbolone A feedlot effluent contaminant. Toxicological Sciences 70, 202-211. 

In a very interesting and innovative study recently, the ultrasound-assisted microbial reduction of chromium [22], Mathur et al. reported the reduction of hexavalent chromium using Bacillus sp, isolated from tannery effluent contaminated site. The optimum reduction was found at pH 7 and 37°C. The percent reduction increased with an increase in biomass concentration and decreased with an increase in the initial concentration of hexavalent chromium. 

Orange G, Amido Black 10B, Direct Red 4BS and Congo Red Four bacterial strains (pseudomonads) isolated from dyeing effluent-contaminated soils Maximum degradation observed in the treatment system after 24 h for Orange G was 60.9 mg L 1, for Amido Black 10B 571.3 mg L, for Direct Red 4BS 112.5 mg L, and for Congo Red 134.9 mg L 1 [184]... 

LEAP (Laboratory Environmental Central Science Water, effluent, contaminated... 

Burrows, G.E. and R.E. Borchard. 1982. Experimental lead toxicosis in ponies comparison of the effects of smelter effluent-contaminated hay and lead acetate. Amer. Jour. Vet. Res. 43 2129-2133. 

Sewage effluent, Contaminated sediments, Pulp mill effluents Natural products... 

Avoidance or ban of unsafe techniques in the laboratory, e.g., oral suction of chemicals in pipettes, sucking of halogenated compounds with a water-jet pump because of effluent contamination. 

The technology has been demonstrated in pilot-scale and full-scale applications to treat pharmaceutical effluent, oily wastewater, landfill leachate, tanneries effluent, contaminated ground-water, and food effluents. ZenoGem is patented and commercially available. 

For example, in fission product effluents where radio-contaminants having longer half-lives are present, the emphasis should be on very high volume reduction with permissible/acceptable decontamination factors so that the permeate could be directly discharged. For effluents contaminated with radionuclides of short half-lives, a good decontamination with reasonable volume reduction may be acceptable because the concentrate could be stored tiU the activities decay before discharge. The radioactive effluents requiring treatment may vary with respect to the type of radionuclide, its chemical nature, concentration, pH, concentration of inactive solutes, and presence of suspended matter. 

The low solubility of phosgene in water renders this solvent as unsuitable, and organic liquids are usually employed in extractive processes. A common way to treat effluents contaminated with phosgene is to absorb the gas into a suitable solvent (commonly one that is used as the medium for the main reaction) it is then possible to regenerate the phosgene... 

Palladium oxide on a ceramic honeycomb Brick kiln contaminants including fluorides, hydrocarbons, mercaptans, dimethyl sulfide, thiophene 400 - 450 NR 34.560 hr- Evaluation of a Decatox system to remove brick kiln effluent contaminants 54... 

Decantation alone is likely to be a sufficient method for cleaning up effluents contaminated with hydrocarbons with water solubilities of less than 0.2% and will, by removing the majority of chlorinated hydrocarbons and other sparingly water-soluble solvents at point-source, minimize their spread throughout the effluent system. However, decantation does nothing to remove materials in solution. Indeed, water-miscible solvents will help to take into solution otherwise immiscible components. 

Guy C, Benali M, Ostigny E. Free radical oxidation process and installation for treating liquid effluents contaminated by organic substances. U.S. Patent No. 5,641,412, 1997. 

In mobilization dominated experiments, greater than 80% of the contaminant was recovered as free phase NAPL followed by a rapid decline to low concentrations of contaminant in the effluent. We illustrate this behavior for four mobilization experiments using Ottawa sand. This is observed in Figure 5 for column experiment POLYTCE 3, in which high concentrations on the order of 500,000 mg/1 TCE were observed during the first pore volume of the surfactant flood. Similar results are shown in Figure 6 where peak effluent contaminant concentrations between 500,000 and 1,000,000 mg/1 were observed at about one pore volume for three other mobilization experiments. 

Figure 6. Effluent contaminant concentration during surfactant flood and post surfactant waterflood for three mobilization experiments.

NAPL divided by the interfacial tension. The interfacial tension was high in these experiments due to the low salinity (Table 2). As shown in Figure 7, a steady plateau of the contaminant concentration in the effluent was observed for 5 to 10 pore volumes followed by a decline to low concentrations. The effluent contaminant concentration was close to the equilibrium solubility of the contaminant as determined by the phase behavior experiments. 

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