scholarly journals Consolidation recovery of rare/hazardous elements from polluted water by the hydrothermal mineralization process

2010 ◽  
Author(s):  
H. Itoh ◽  
R. Sasai ◽  
T. Itakura
Keyword(s):  
Polluted Water ◽  
Mineralization Process ◽  
Hydrothermal Mineralization ◽  
Hazardous Elements

The Solubility of Some Alkali-Bearing Zr Minerals in Hydrothermal Solutions

1996 ◽  
Vol 432 ◽  
Author(s):  
S. U. Aja ◽  
S. A. Wood ◽  
A. E. Williams-Jones
Keyword(s):  
Hydrothermal Solutions ◽  
Mineralization Process ◽  
Two Stage ◽  
Calculated Phase ◽  
Crustal Fluids ◽  
Hydrothermal Mineralization ◽  
Solubility Products ◽  
Phase Relationships

AbstractThe hydrolytic dissolution of some Zr-bearing minerals has been measured in aqueous KCl and KF solutions. Depending on the mineral being investigated, Zr concentrations varied from about 9 ppb to nearly 40 ppm in equilibrated solutions; this validates the notion of Zr mobility in some crustal fluids. At 50 °C, ΔfG were determined (using the measured solubility products) for Na catapleiite, elpidite, vlasovite and weloganite to be -4654.2±5.6, -7391.0±11.6, -5181.0±7.3 and -7130.5±1.0 kJ/mol, respectively. Calculated phase relationships amongst the zirconosilicates found at the Strange Lake peralkaline complex indicate that elpidite and gittinsite cannot coexist stably implying a two-stage hydrothermal mineralization process.

IMPACT OF SEWAGE EFFLUENTS ON WETLAND FLORA OF AZAMGARH DISTRICT

2019 ◽  
Vol 25 (1) ◽  
Author(s):  
GAJRAJ PANDEY ◽  
S.N. CHAUBEY ◽  
N.K. SRIVASTAVA
Keyword(s):  
Uttar Pradesh ◽  
Polluted Water ◽  
Sewage Effluents

Sewage effluents were studied in polluted water including toxic damages on the flora of the area of Azamgarh district of Uttar Pradesh, India.

Phyto-purification of polluted water by using Poaceae case of Lake Reghaia

2019 ◽  
Vol 51 (3) ◽  
Author(s):  
Boussaid Khadidja ◽  
Cheboutimeziou Nadjiba
Keyword(s):  
Polluted Water

Pharmaceutically Active Compounds Degradation Using Doped TiO2 Functionalized Zeolite Photocatalyst

2018 ◽  
Vol 69 (1) ◽  
pp. 34-37 ◽  
Author(s):  
Monica Ihos ◽  
Corneliu Bogatu ◽  
Carmen Lazau ◽  
Florica Manea ◽  
Rodica Pode
Keyword(s):  
Organic Carbon ◽  
Active Compound ◽  
Uv Spectra ◽  
Pharmaceutically Active Compounds ◽  
Mineralization Process ◽  
Active Compounds ◽  
Spectra Analysis ◽  
Doped Tio2 ◽  
Toc Removal ◽  
Pharmaceutically Active Compound

The aim of this study was the investigation of photocatalytic degradation of pharmaceutically active compounds using doped TiO2 functionalized zeolite photocatalyst. Diclofenac (DCF), a non-steroidal anti-inflammatory drug, that represents a biorefractory micropollutant, was chosen as model of pharmaceutically active compound. The photocatalyst was Z-TiO2-Ag. The concentration of DCF in the working solutions was 10 mg/L,50 mg/L,100 mg/L and 200 mg/L and of photocatalyst 1 g/L in any experiments. The process was monitored by recording the UV spectra of the treated solutions and total organic carbon (TOC) determination. The UV spectra analysis and TOC removal proved that along the advanced degradation of DCF also a mineralization process occurred. The carried out research provided useful information envisaging the treatment of pharmaceutical effluents by photocatalysis.

Reducing the Ecotoxicity of Pesticide Polluted Waters by Electrochemical Methods

2019 ◽  
Vol 70 (5) ◽  
pp. 1574-1578
Author(s):  
Cristian Neamtu ◽  
Bogdan Tutunaru ◽  
Adriana Samide ◽  
Alexandru Popescu
Keyword(s):  
Nitrogen Atmosphere ◽  
Constant Current ◽  
Polluted Water ◽  
Gaseous Nitrogen ◽  
Constant Current Density ◽  
Electrochemical Approach ◽  
Saline Waters ◽  
Thermal Combustion ◽  
Polluted Waters ◽  
Thermal Stability Of

Electrochlorination constitutes an electrochemical approach for the treatment of pesticide-containing wastewaters. This study evaluated the electrochemical and thermal stability of four pesticides and the efficiency of electrochlorination to remove and detoxify the simulated polluted water with: Acetamiprid, Emamectin, Imidacloprid and Propineb. This study reports the experimental results obtained by cyclic voltammetry and electrolysis at constant current density in association with UV-Vis spectrophotometry. In saline waters this pesticides are electrochemical active and anodic peaks are registered in the corresponding voltammograms. After thermal combustion, in a gaseous nitrogen atmosphere, a residue ranging from 15 to 45 % is observed at 500 �C.

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