مدير المعهد الحالى

أ.د/ محمد الخولى

مدير المعهد

إدارات المعهد المتعاقبة
من البداية حتى الآن

أ.د/ محمد رياض احمد

مدير معهد بحوث الأراضى والمياه والبيئة الفترة: 1954 - 1957

مواقع صديقة

وزارة الزراعة وإستصلاح الأراضى
Ministry of Agriculture and Land Reclamation
المكتبة القومية الزراعية
Egyptian National Agricultural Library
مزيد من المواقع الصديقة

مواقع مفيدة

المرجع الزراعى
Agri-Science Reference
منظمة الأغذبة والزراعة بالأمم المتحدة
Food And Agriculture Organization OF The United Nations
الإدارة المركزية للأراضي والمياه والبيئة‎
Central Administration of Soils, Water and Environment
مزيد من المواقع المفيدة

تابعونا على مواقع التواصل


أحدث البحوث المضافة

Hossam S. El-Beltagi , Fadl A. Hashem, Mona Maze, Tarek A. Shalaby, Wael F. Shehata and Noura M. Taha( 2022). Control of Gas Emissions (N2O and CO2) Associated with Applied Different Rates of Nitrogen and Their Influences on Growth, Productivity, and Physio-Biochemical Attributes of Green Bean Plants Grown under Different Irrigation MethodsAgronomy 2022, 12, 249.
More about researches
Doaa Ahmed El-Nagar a Dalal Hereimas Sary( 2021). Synthesis and characterization of nano bentonite and its effect on some properties of sandy soilsSoil & Tillage Research 208 (2021) 104872
More about researches

أحدث رسائل الماجستير
المضافة إلى الموقع

عبد الرحمن أمير عبده ( 2015).
الخمائر كاداه واعده لإنتاج الزيوت الميكروبيه.
Yeasts As Apromising Tool For Microbial Oil Production
More about researches
إيمان عبد المجيد زغلول( 2015).
كفــاءة الأســـمـدة النيتــروجينيــة فـي الأراضــي الملــوثــــة
Efficiency Of Nitrogen Fertilizers In Contaminated Soils
More about researches

أحدث رسائل الدكتوراه
المضافة إلى الموقع

محمد سعد عبد الستار رمضان( 2016).
علاج بعض الأراضي المصرية الملوثة بالعناصر الثقيلة باستخدام بعض النباتات المجمعة لهذه العناصر
Phytoremediation of Some Egyptian Soils Polluted with Heavy Metals
More about researches
أيمن حاكم سراج( 2015).
نمو ومحصول وامتصاص العناصر في الذرة متأثرة بالتسميد العضوي والحيوي تحت الظروف الملحية.
Growth, yield and nutrients uptake of maize as affected by organic and biofertilization under saline conditions
More about researches

Samir A. El-Gendi ; A. Sh. A. Osman and M.H. Abdel- Aal( 2016). Environmental assessment of some heavy metals in Khor Garf- Hussin sediments (Nasser lake, Aswan, Egypt)., Zn Egypt . J. of Appl. Sci., 31 (10) 248 -258
Abstract: Lake Nasser and its khors is considered the sole source of surface fresh water reservoir and provide more than 95% of the Egyptian fresh water budget. Therefore, water pollution control is clearly one of the most critical challenges. In the present study, six heavy metals in the Khor Garf –Hussin sediments were sequentially fractionated using Tessier et al (1979) method as well as two risk assessment codes were applied to evaluate potential ecological risks of that metals .The results showed that the abundance of the tested metals was in the order of Fe (15322.36)>Mn (306.12) >Zn (40.69) >Ni (37.22) > Cu (26.42)> Pb (12.41μgg-1). It is cleared that the content of the tested metals were below the threshold values for stream sediment composition reported by (Aston and Thornton ,1977).Fractionation results showed that the order of abundance of the tested metals in exchangeable fraction were Cu , Pb , Ni , Mn , Zn and Fe , comprising 9.09, 5.11, 4.58 , 2.74 , 2.20 and 0.01% of sum of their fractions, respectively. Meanwhile , Ni followed by Cu and Pb were the most abundant metals associated with carbonate fraction , comprising 24.28% , 15.78% and 8.26% of their sums , respectively . These results suggested that Ni, Cu, and Pb may exist in sediment as carbonate minerals. The data also, showed that the majority of the tested metals were associated with the reducible fraction. The order of abundance were Pb (35.28%), Zn(28.11 %),Ni(22.78%),Cu (20.02%), Mn (16.80%), and Fe (2.17%). This could be due to the fact that this fraction constitute a significant sink for heavy metals in aquatic system. Also ,the data showed that Mn , Pb and Cu were the most abundant metals in organic bounded fraction, comprising 17.73% ,15.51%,and12.48%,respectively. Moreover, the results of all the tested metals were predominant associated with residual fraction, Fe was the most abundant metal in residual fraction , constituting 97.30% of the sum of its fractions, followed in decreasing order by Mn( 59.18%) , Zn (55.71%) . Cu (42.62%),Ni (37.06%), and Pb (35.84%), suggesting that the majority of the tested metals exist mainly as silicate. According to Risk Assessment Code, the present data indicated that Fe, Mn and Zn showing low risk for aquatic environment. Ni followed by Cu and Pb showed medium risk .On the same connection, the calculated contamination factor confirmed that sediments of Khor- Gurf Hussin are free from contamination with the tested metals. Therefore, It’s imperative on Egyptian government to quantify the pressures caused by human activities in and around lake Nasser reservoir.

Keywords: (Environmental indicators - sediments , lake Nasser , sequential fractionation)

The full text

Return to researches