خيارات البحث
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Environmental Situation of an Agricultural Area in Akure, Nigeria, Based on Physico-Chemical Properties of Rainwater
2018
Abulude, Francis | Ndamitso, M.M. | Abdulkadir, A
Acid rain still poses a global problem today, exerting many adverse effects on man, animal, and materials. As its research question, the present study tries to find out whether or not acid rains exist in Akure, Nigeria. For so doing, it determines physico-chemical properties of rain water samples, namely pH, temp, Electrical Conductivity (EC), TDS, acidity, SO4-, NO2-, Cl-, and Free CO2. According to the results, the pH ranged between 6.0 and 7.8, never falling below 5.6 which is an indication of acid rain. Also, the minimum EC was 3µS/cm and the maximum, 201µS/cm. Moreover, TDS was between 1 and 100mg/L, while Free CO2 had a mean of 23.00 and Standard Deviation of 6.16. The dominant ion was SO4- (10-11%), followed by NO3-, and Cl-. Results from the first six months (July-December 2015) reveal slight correlations in the following: TDS with pH (0.532), EC and pH (0.501), Temp and Free CO2 (0.59), whereas strong correlations have been recorded in the following parameters: Acidity with pH (0.71) and Temperature (0.69), NO2- with pH (0.96) and acidity (0.96), SO4- with temp (0.68) and NO2- (0.83), and finally Cl- with Free CO2 (0.61), NO2- (0.73), and Cl- (0.65). It can be concluded that in the environment under this study there have been no acid rain within the period.
اظهر المزيد [+] اقل [-]Yields of field-grown soybeans exposed to simulated acidic deposition.
1989
Evans L.S. | Lewin K.F. | Santucci K.A. | Owen E.M.
Relationship between foliar injury and changes in antioxidant levels in red and Norway spruce exposed to acidic mists.
1991
Chen Y.M. | Lucas P.W. | Wellburn A.R.
Etude prospective d' implantation de stations de mesures dans les Vosges. 1. Organisation, realisations. 2. Quelques resultats sur l' acidite des pluies en Lorraine. 3. La circulation atmospherique et la repartition des polluants dans le Massif Vosgien. 4. Premiers resultats, interpretation, hypotheses [deperissement des forets].
1985
Thuillier Anziani C. | Frecault R. | Roussel I. | Livertoux M.H.
Effects of acid rain on growth and nutrient concentrations in Scots pine and Norway spruce seedlings grown in a nutrient-rich soil.
1995
Back J. | Huttunen S. | Turunen M. | Lamppu J.
Pluies acides, production de nitrate dans les sols forestiers et annees de secheresse estivale: cofacteurs de risque de deperissement des forets. Reflexions sur la synergie.
1989
Bardy J.A.
Description et fonctionnement d' une station automatique de prelevements sequentiels et d' etude des pluies.
1986
Dubois J. | Ducourroy A. | Martin C. | Masniere P.
Solubilisation du fluor par acidolyse des argiles.
1986
Bardy E.A. | Pere C.
Etude des pluies recueillies en trois points a proximite de Besancon.
1986
Dole S. | Guyetant R. | Martin D. | Remy F. | Reyle R. | Rouault J.Y. | Valero L. | Vidonne A.
