Flood forecasting based on an artificial neural network scheme     

Dtissibe  Francis Yongwa  Ari  Ado Adamou Abba  Titouna  Chafiq  Thiare  Ousmane  Gueroui  Abdelhak Mourad 《Natural Hazards》2020,104(2):1211-1237

Natural Hazards - Nowadays, floods have become the widest global environmental and economic hazard in many countries, causing huge loss of lives and materials damages. It is, therefore, necessary...  相似文献   

Land leasing in a post-land reform context: insights from Zimbabwe     

Mudimu  George T.  Zuo  Ting  Shah  Ashfaq Ahmad  Nalwimba  Nkumbu  Ado  Abdou Matsalabi 《GeoJournal》2021,86(6):2927-2943

GeoJournal - Despite the Zimbabwean State’s narrative and discourse that in fast track land reform areas ‘land leasing is illegal’, there is a surge in land leasing. This article...  相似文献   

Wastewater dephosphorization using crude clays     

P. J. M. R. Dable M.Sc.  Ph.D. in materials sciences  Y. J. Adjoumani M.Sc. student in Industrial Process  B. Yao M.Sc.  Ph.D. in industrial science  G. Ado M.Sc.  Ph.D. in materials science 《International Journal of Environmental Science and Technology》2008,5(1):35-42

The present work aims to establish the possibility of using local clays to treat wastewater. Thus, three clay samples extracted from two localities in the south of Côte d’Ivoire have been studied in their crude state. The qualitative physicochemical study that consisted in measurement of pH variation and argillaceous particles zeta potential showed that the Nieki-Agneby clay and the Beige Anyama clay presented disposal to uptake phosphate ions in solution at pH 5. For each clay, it is shown that the tension accompanying the sorption of a phosphate ion could be estimated to ?5 mV. Differences in their composition and in the number of hydrating molecules of water were also accessible. The quantitative study performed with the Nieki-Agneby clay thereafter consisted following the sorption kinetic. The adsorption was found to reach the maximum after 5 h. of exchange, and almost 400 μg phosphate ions in per gram of clay were fixed. Future studies will focus on the modification of these materials in order to increase their sorption capacity.  相似文献   

Kinetics and thermodynamics study of lead adsorption on to activated carbons from coconut and seed hull of the palm tree     

S. Gueu  B. Yao  K. Adouby  G. Ado 《International Journal of Environmental Science and Technology》2007,4(1):11-17

The kinetic and thermodynamic of the bath sorption of lead (Pb) on to activated carbon from Coconut (CA) and Seed hull of the Palm tree (GA) have been investigated. The effects of initial Pb concentration, contact time and temperature were examined. The results showed that the adsorption capacities of the activated carbons increased with the initial lead concentration. The process sorption followed a pseudo first order kinetics and parameters such as Ea and k₀ were determined. It could be best fitted by the Langmuir and Freundlich isotherms. From the first, the equilibrium sorption capacities of lead ion were determined and found to be respectively 4.38 and 3.77 mg/ g for CA and GA at 60 °C. The thermodynamic parameters such as dGH, dGS and dGG were computed from the experimental data. These values show that the adsorption is endothermic and non spontaneous. Moreover, the relative weak values of dGH (～5 kcal/mol) confirm a physical adsorption. The maximum adsorptions were obtained at 60 °C, pH 4 and with a Pb initial concentration of 100 mg/L.  相似文献