Study on Removal Efficiency of Natural Organic Matter and Lead Metal Solution Using Nanofiltration Membrane

2012 ◽  
Vol 03 (05) ◽  
Author(s):  
Mustapha Chabane
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Removal Efficiency ◽  
Nanofiltration Membrane ◽  
Metal Solution ◽  
Lead Metal

Fouling studies of a polyamide nanofiltration membrane by selected natural organic matter: an analytical approach

Desalination ◽  
2005 ◽  
Vol 173 (3) ◽  
pp. 223-238 ◽  
Author(s):  
D. Violleau ◽  
H. Essis-Tome ◽  
H. Habarou ◽  
J.P. Croué ◽  
M. Pontié
Keyword(s):  
Organic Matter ◽  
Natural Organic Matter ◽  
Analytical Approach ◽  
Nanofiltration Membrane

scholarly journals Effect of Natural Organic Matter on the Ozonation Mechanism of Trimethoprim in Water

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2935
Author(s):  
Ning Zhang ◽  
Beihai Zhou ◽  
Rongfang Yuan ◽  
Fei Wang ◽  
Huilun Chen
Keyword(s):  
Organic Matter ◽  
Free Radical ◽  
Natural Organic Matter ◽  
Removal Efficiency ◽  
Bacterial Infections ◽  
Degradation Mechanism ◽  
Degradation Pathways ◽  
Ozonation Time ◽  
Direct Hydroxylation ◽  
Fluorescence Peak

Trimethoprim (TMP) is often used for the treatment of various bacterial infections. It can be detected in water, and it is difficult to be biodegraded. In this study, the degradation mechanism of TMP through ozonation and the effect of humic acids (HA) were investigated. Excessive ozone (pH 6, 0 °C) could reduce the content of TMP to less than 1% in 30 s. However, when ozone (O3) was not excessive (pH 6, 20 °C), the removal efficiency of TMP increased with the increase of O3 concentration. Four possible degradation pathways of TMP in the process of ozonation were speculated: hydroxylation, demethylation, carbonylation, and cleavage. The presence of HA in water inhibit the generation of ozonation products of TMP. The excitation-emission matrices (EEM) analysis showed that with the extension of ozonation time, the fluorescence value in the solution decreased and the fluorescence peak blue shifted. These results indicated that the structure of HA changed in the reaction and was competitively degraded with TMP. According to the free radical quenching test, the products of pyrolysis, direct hydroxylation and demethylation were mainly produced by indirect oxidation.

scholarly journals REMOVAL OF NATURAL ORGANIC MATTER USING ELECTROCOAGULATION AS A FIRST STEP FOR DESALINATION OF BRACKISH WATER

2011 ◽  
Vol 11 (1) ◽  
pp. 103-107
Author(s):  
Wasinton Simanjuntak ◽  
Irwan Ginting ◽  
Kamisah D. Pandiangan
Keyword(s):  
Organic Matter ◽  
Water Sample ◽  
Natural Organic Matter ◽  
Removal Efficiency ◽  
Brackish Water ◽  
Contact Time ◽  
Potable Water ◽  
Sea Water ◽  
Sampling Site ◽  
Treatment Efficiency

In the present study, electrocoagulation method was employed to remove natural organic matter from brackish water. This study explores the potential of brackish water as a source of potable water. Two electrochemical variables, potential and contact time, were tested to determine their effect on the treatment efficiency defined in terms of the reduction of the absorbance at the wavelength of 254 nm (A254). Both potential and contact time were found to influence the removal efficiency of the method, and the best result was obtained from the experiment using the potential of 8 V and contact time of 60 min, resulting in 69.5% reduction of the absorbance. Very clean treated water was produced with much lower conductivity (12.06 mS/cm) as compared to that obtained for the sea water sample from a location near to the sampling site (133.9 mS/cm).

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