Acidity
Physicochemical Characterization of Olive Oil Mill Wastewaters In The Eastern Region of Morocco
Thu, 2014-10-09 13:40 — Shehdeh JodehThe 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.
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A Role for Decaying Leaves in Mitigating the Harmful Effects of Acid Rain: Effects of Acidity, Foreign Ions, Concentration of Leaves and Location
Mon, 2014-03-24 14:47 — Shukri Mohammed KhalafDecaying 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.
Effects of Several Factors on the Growth and On the Metal Uptake and Uptake Distribution of Okra Plant Treated With Cadmium
Sun, 2014-01-12 13:56 — Mohammed Al-Subu'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.
Temperature and Storage Age (Weekly Basis)-Dependent of Olive Oil Viscosity
Mon, 2013-04-22 09:27 — Prof. Issam Rashid AshqerThe 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%.
Removal of Dissolved Copper from Polluted Water Using Plant Leaves
Mon, 2011-02-28 12:03 — Ibrahim Diab Abu-Shqair
