Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Evaluation Of Ground Water Quality In Dakhla Oasis (Egyptian Western Desert) (1999)
    Springer
    Environmental monitoring and assessment 57 (1999), S. 157-168 
    Details
    ISSN: 1573-2959
    Keywords: Dakhla oasis ; Egypt ; ground water ; saturation index ; water quality index
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Chemical analyses of ground water and soil samples at Zakhera Village (Dakhla Oasis, Egyptian Western Desert) were carried out on ten artesian wells. The interrelationships between the major and minor ions' behaviour and the prevailing geological and environmental conditions were examined. Ground water quality varies widely, even at short distances, depending on hydrogeological conditions, pumping period, depth of aquifer, type of soil, and human activities. Significant differences of the flux coefficient values for metals and non-metals were observed as a result of the redox status of their environment and adsorption phenomena. Water quality index (WQI), and saturation index (SI) indicated the suitability of these samples for different uses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1005948930316
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The impact of three industrial effluents on submerged aquatic plants in the River Nile, Egypt (1996)
    Springer
    Hydrobiologia 340 (1996), S. 77-83 
    Details
    ISSN: 1573-5117
    Keywords: River Nile ; industrial pollution ; submerged macrophytes ; canonical ordination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The submerged vegetation growing in the drainage channels taking effluent from three factories (two processing sugar cane plus one producing chipboard or paper pulp; and one large fertilizer plant) into the River Nile in Upper Egypt, and in the river itself upstream and downstream of the discharge points, was studied during 1994. The main pollutants from the sugar cane factory effluents comprised organic matter, including carbohydrates; from the fertilizer plant ammonia was the principal pollutant. The study investigated the effect of these different pollutants on aquatic plant standing crop and distribution, in relation to physico-chemical characteristics of water and hydrosoil. In the effluent channels, dominated by large growths of sewage fungus, submerged vegetation was absent, although some emergent vegetation survived. In the most polluted river sites, up to 2 km downstream of discharge points, the flora was restricted to Potamogeton pectinatus L. Elsewhere in the river, a more diverse submerged flora was present, including Ceratophyllum demersum L. and Potamogeton crispus L.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00012737
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Distribution and chemical fractionation of some heavy metals in bottom sediments of Lake Nasser (1997)
    Springer
    Hydrobiologia 364 (1997), S. 31-40 
    Details
    ISSN: 1573-5117
    Keywords: heavy metals ; sediments ; fractionation ; AAS ; Egypt
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Distribution and phase association of Cd, Cr, Cu, Fe, Mn, Ni,Pb, Zn and organic matter in Nile sediments taken from LakeNasser (Aswan, Egypt) were investigated. The sediment sampleswere subjected to selective chemical extraction proceduresdesigned to fractionate the particulate heavy metals into sixfractions: (A) ammonium acetate-extractable metals; (B) sodiumacetate-extractable metals; (C) acid oxalate-extractablemetals; (D) hydroxylamine HCl-extractable metals; (E) aquaregia-extractable metals and (F) total metals (HF/HCl/HNO3destruction). Exchangeable metals which can be extracted byammonium acetate solution are generally considered readilybioavailable as they are weakly bound and may equilibrateeasily with the aqueous phases. In the present study very smallconcentrations of all heavy metals considered were found inthis phase. Between this phase and the metal phases which arenot bioavailable (those exist in highly resistant phases) thereexist several geochemical phases (fractions B, C & D) that maypotentially release their associated metals under changingenvironmental conditions, such as pH and redox potential in thewater sediment interface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003112008122
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...