Acidity

sjodeh's picture

Physicochemical Characterization of Olive Oil Mill Wastewaters In The Eastern Region of Morocco

Journal Title, Volume, Page: 
J. Mater. Environ. scie 06/2014; 5(4):1039-1058
Year of Publication: 
2014
Authors: 
D. Bouknana
B. Hammouti
R. Salghi
S. Jodeh
Current Affiliation: 
Department of Chemistry, AN-Najah National University, P. O. Box 7, Nablus, State of Palestine
A. Zarrouk
I. Warad
A. Aouniti
M. Sbaa
Preferred Abstract (Original): 

The aim of this study is to achieve a complete physicochemical characterization of the samples of the olive oil mill wastewaters collected from five different prefectures in eastern Morocco (Oujda, Nador, Berkane, Taourirt and Jerada), A comparative study was investigated with several OOMW samples from three olive oil extraction processes (traditional, semi-modern and continuous) were compared. This research is one of the first studies investigating the physicochemical characterization of olive oil mill wastewaters oil mills crushing olives Oujda area. The composition of OOMW varies significantly for each mill. The results of the physicochemical analyzes showed that all the samples of olive oil mill wastewaters have an acidic pH, the average value is between (4.5 and 5.32); and the values of the conductivity are varied between: 23-41ms/ cm for the (PP and CP3P) but for the (CP2P) are varied between: 13-25 ms/cm, this high conductivity due to the addition of the salt during storage before their crushing olives. The OOMWs are rich in organic matter. This last parameter is expressed as BOD5
and COD. The average of the total BOD, COD, biodegradability, of samples varied with oil extraction processes, for the (PP): (BOD5 : 17-25 g O2 5 /L; COD :108-120 g O/L; biodegradability: 0.11-0.25); for the (CP3P): (BOD5: 12.5- 23 gO2/L; COD :76-100; biodegradability: 0.16-0.23) and for the (CP2P): (BOD5: 8.5-19 gO2/L;COD :52-64 g O2 2 /L; biodegradability: 0.16-0.23). And the samples are riche of the Oxidizable matters ((COD+2BOD)/3),therefore, the connecting this industrial facility to a municipal sewer system is impossible; because, any connection of the units trituration olives can lead to dysfunctional treatment plant wastewater; but which poses a great problem for these unit s trituration effluents is non-biodegradable material: polyphenols and tannins, the values( the samples of OOMW filtered) are varied: (polyphenols: 0.8-1.35 g/L and tannins :0.62-1.2 g/L) for the PP, for CP3P (polyphenols: 0.29-1.83 g/L and tannins :0.2-1.71 g/L), but for the (CP2P) are varied between (polyphenols: 0.24-0.67g/L and tannins :0.12-0.65 g/L). In this article, recent and older research studies for the physicochemical characterization of olive mill wastewaters performed by several authors were shown.

shkhalaf's picture

A Role for Decaying Leaves in Mitigating the Harmful Effects of Acid Rain: Effects of Acidity, Foreign Ions, ‎Concentration of Leaves and Location

Journal Title, Volume, Page: 
Journal of Environmental Science and Health . Part A: Environmental Science and Engineering and Toxicology Volume 29, Issue 3
Year of Publication: 
1994
Authors: 
Shukri Khalafa
Chemistry Department, Faculty of Science, An-Najah National University, Nablus, Palestine
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Radi Salima
Chemistry Department, Faculty of Science, An-Najah National University, Nablus, Palestine
Preferred Abstract (Original): 

Decaying leaves have been found capable of resisting the effects of acid rain via their ability to buffer water.

In a previous study the buffering action of five common types of leaves (cypress, oak, pine, cinchona and ficus) was investigated. In the present study the effects of several factors on the buffering ability of these leaves have been studied. These factors are acidity, presence of foreign ions, concentration of leaves and location.

The studied factors have been found not to affect the pattern of variation of pH of the leaf suspensions with time but to affect the pH value reached by these suspensions.

Ficus leaves have shown a distinct copability of neutralizing acidic waters.

2052's picture

Effects of Several Factors on the Growth and On the Metal Uptake and Uptake Distribution of Okra Plant Treated With Cadmium

Journal Title, Volume, Page: 
Journal of Environmental Science and Health . Part A: Environmental Science and Engineering and Toxicology Volume 30, Issue 9, 1995
Year of Publication: 
1995
Authors: 
Radi Salim
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
M.M. Al‐Subu
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Y.S.S. Ismail
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Preferred Abstract (Original): 

Several factors affecting the growth and the uptake of cadmium by okra plants were studied using both root ‐ treatment and foliar ‐ treatment. These factors were the concentration of cadmium , type of treatment, soil composition, presence of foreign ions, salinity, acidity and temperature.
Both growth of plant and cadmium uptake by plant were affected highly by the concentration of cadmium, type of treatment, soil composition, salinity and temperature. Acidity of solutions has only a little and irregular effect. A synergistic combined effect of lead, copper and zinc with cadmium was observed on the growth of plant but not regular on the uptake of cadmium.

2160's picture

Temperature and Storage Age (Weekly Basis)-Dependent of Olive Oil Viscosity

Journal Title, Volume, Page: 
MSAIJ,9(11),2013[445-451]
Year of Publication: 
2013
Authors: 
Tajweed Hashim Nierat
Department of Physics, Faculty of Sciences, An-Najah National University, Palestine
Sharif Mohammad Musameh
Department of Physics, Faculty of Sciences, An-Najah National University, Palestine
Issam Rashid Abdel-Raziq
Department of Physics, Faculty of Sciences, An-Najah National University, Palestine
Current Affiliation: 
Department of Physics, Faculty of Sciences, An-Najah National University, Palestine
Preferred Abstract (Original): 

The dynamic viscosity of olive oil samples of different storage ages in weekly basis from different locations was measured as a function of temperature. In this study, the dynamic viscosity as a function of storage age in weekly basis decreases with increasing temperatures. Three and multi-constant formulas were proposed to obtain more suitable prediction of temperature dependence of dynamic viscosity of olive oil samples. The best AAD% was calculated using our proposed formulas to be 0%.

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Ibrahim Diab Abu-Shqair's picture

Removal of Dissolved Copper from Polluted Water Using Plant Leaves

Journal Title, Volume, Page: 
Rev. Int. Contam. Ambient. 17 (2) 91-95
Year of Publication: 
2001
Authors: 
Ibrahim Diab Abu-Shqair
Department of Chemistry, An Najah National University, P. O. Box 7, Nablus, Palestine
Current Affiliation: 
Department of Chemistry, An Najah National University, P. O. Box 7, Nablus, Palestine
Mohammed M. Al-Subu
Department of Chemistry, An Najah National University, P. O. Box 7, Nablus, Palestine
R. Salim
Department of Chemistry, An Najah National University, P. O. Box 7, Nablus, Palestine
K. M. Swaileh
Department of Biology and Biochemistry, Faculty of Science, Birzeit, Palestine
Preferred Abstract (Original): 
Removal of copper from polluted water by plant leaves was studied using 15 species. Copper was recovered in variable percentages depending on the species and pH value of the solution. Copper recovery from a 20 mg/L copper solution ranged between 88% (in poplar leaves) and 33% (in oak leaves). For all leaves studied, maximum copper recoveries were found to be between pH 4 and 6 depending on the plant species. At pH 2 the copper was not removed by the plant leaves studied. Adsorption was suggested as the main mechanism for the reaction between copper ions and plant leaves with a reaction order equal to one.
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