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Structure and thermodynamic properties of positive and negative cluster ions in saturated vapour over barium dichloride
(Taylor & Francis online, 2013-03-13)
Geometrical structure, vibration spectra, and enthalpies of dissociation have been investigated for the ions BaCl3−, Ba2Cl3+, Ba3Cl5+, and Ba4Cl7+ which were detected earlier in the saturated vapour over BaCl2. Quantum ...
Formalization of water allocation systems and impacts on local practices in the Hingilili sub-catchment, Tanzania
(Taylor & Francis online, 2013-05-31)
Water scarcity caused by increased demands often leads to competition and conflict over water in many river catchments in Sub-Saharan Africa. At the local level, water users have in many places been able to solve water ...
Polycentrism and pitfalls: the formation of water users forums in the Kikuletwa catchment, Tanzania
(Taylor & Francis online, 2013-05-31)
Catchment forums have to address the reality that river catchments typically cover several administrative districts and have overlapping arrangements of state-led and locally created institutions. Institutional nesting has ...
Enhancement of porosity of sodium silicate and titanium oxychloride based TiO2–SiO2 systems synthesized by sol–gel process and their photocatalytic activity
(Elsevier, 2013-09-15)
The textural properties of TiO2–SiO2 composites (TSCs) were successively enhanced using three approaches; (1) washing the hydrogels with different solvents, (2) using surfactant and (3) forming the TiO2 sol in ethanol ...
Quantitative recovery of high purity nanoporous silica from waste products of the phosphate fertilizer industry
(Elsevier, 2013-01-25)
This study reports on the quantitative recovery of high purity nanoporous silica from wastes material (H2SiF6) of the phosphate fertilizer industry and Na2O·SiO2. The silica recovered from the wastes was compared with ...
Predicting the lowest effluent concentration in capacitive deionization
(Elsevier B.V., 2013-08-30)
Capacitive deionization (CDI) is a promising technology for desalination of brackish water with different applications such as in the pharmaceutical industry, semiconductor manufacturing, and domestic use. The CDI cell ...
Ultrapure water from seawater using integrated reverse osmosis-capacitive deionization system
(Taylor & Francis Online, 2013-12-19)
The use of water for particular application depends on its purity level. In accordance with the world health organization, water with total dissolved salts (TDS) less than 500 ppm can be considered good for human consumption. ...
Desalination using capacitive deionization at constant current
(Elsevier B.V., 2013-11-15)
Capacitive deionization (CDI) is an emerging technology of desalinating brackish/seawater to attain freshwater. The process involves polarization of the two electrodes electrically using direct current; thus the cations ...
Assessment of Technology Options Addressing Agricultural Production Constraints in Western Kenya
(Greener Journal of Agricultural Sciences, 2013-03-29)
Poor soil fertility and weed infestation are among major constraints facing agricultural production in Western Kenya. Recommended technologies differ in resource requirement and their effectiveness ...
Facile biosynthesis of Ag–ZnO nanocomposites using Launaea cornuta leaf extract and their antimicrobial activity
(NM-AIST, 2013-11-14)
The quest to synthesize safe, non-hazardous Ag–ZnO nanoomposites (NCs) with improved physical and chemical prop-
erties has necessitated green synthesis approaches. In this research, Launaea cornuta leaf extract was ...