Publications Internationales
Permanent URI for this collectionhttps://dspace.univ-boumerdes.dz/handle/123456789/13
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Item Treatment of partially stabilized landfill leachate using combinations of coagulation, Fenton oxidation and granular activated carbon (GAC) adsorption(2016) Boumechhour, F.; Kerbachi, Rabah; Rechoum, A.E.; Benmenni, M.S.This study investigated the treatment performances of coagulation, Fenton oxidation, granular activated carbon adsorption and combinations between them aiming to provide an efficient method for the treatment of partially stabilized leachates. Leachates were collected from Ouled Fayet landfill (Algeria) , samples were characterized with a low biodegradability (BOD5/COD ratio about 0.15), COD of 8294 mg/l and pH around 8. The sequence of stages implemented was: (a) Coagulation /flocculation (COD removal ≈ 71 % with FeCl3 dosage of 1.6 g/l at pH 5); (b) Fenton oxidation (COD removal ≈ 74.6% using 5g/l of H2O2, H2O2/ Fe(II) molar ratio = 6 at pH 3.5); (c) Coagulation/flocculation followed by Fenton oxidation (>86 % of COD removal was achieved) ; (d) Fenton oxidation followed by coagulation/flocculation (COD removal ≈ 81.7% ) and (e) Granular activated carbon adsorption after coagulation and Fenton process ( very good reduction in COD : 94.2% )Item Impact of earthquake demolition debris on the quality of groundwater in Boumerdes, Algeria(2011) Benmenni, M.S.; Benrachedi, K.This study is a contribution to the assessment of actual impact on the quality of groundwater of buried demolition debris from the city of Boumerdes, in the North of Algeria 5 years after the May 21st 2003 earthquake hit the region. Leachate analysis indicated organic matter with relatively high COD (1136 mg/L O2) and BOD5 (200 mg/L O2); whereas the pH yielded 7.65 thus indicating fermentation phase of the landfill. Heavy metal contents are beyond national standard limits except for Pb with 0.51 mg/L which is slightly higher than limit value of 0.5 mg/L. More than 5 years after the creation of this landfill and despite its predominant C and D nature, these results showed that it is following a typical urban wastes decomposition scheme. Same analysis carried on water samples drawn from the piezometers yielded following results: acidic pH (6.88), acceptable values of target heavy metals concentrations except for Zn with 0.779 mg/L. Additionally bacteriological cross analysis (membrane filter and multi-tube methods) showed groundwater contamination by total coliforms (1100/100 mL), fecal coliforms (11/100mL) and fecal streptococci (1100/100 mL)Item Impact of debris from demolition of Boumerdes on the quality of groundwater(2010) Benmenni, M.S.; Benrachedi, K.The public discharge of Boumerdes city is at 5 km from downtown at Tidjelabine site and marly-calcareous formation. This formation shows crack porosity that facilitates pollution of groundwater reserves. The slope character of the field also favours the movement of pollutants. Leachates penetrating from the discharge towards the water table result in water quality deterioration. Chemical analysis carried out on samples from three piezometers show large concentration of chromium, zinc and lead, thus confirming the high groundwater deterioration. To assess the degree of pollution caused by this discharge, a comparison with other similar discharge was studied. This shows that the site is ancient of the discharge and is not stabilized yet and an acidic phase of anaerobic degradation is still going on. bacteriogical analysis carried out on groundwater show a microbiological contamination