A B S T R A C TThis research was aimed at investigating the concentration of Ascorbic Acid (Vitamin C) in some commercial fruits juices: '5' Alive, Hollandia yoghurt, Nutri milk, Ribena, Lacasera, Happy hour, Viju milk, Chi exotic and Chi vita sold in Ugbokolo, Benue State, Nigeria by titrimetric method using 2,6-dichlorophenolindophenol (

In this study, goethite (FeOOH) which is an iron oxy-hydroxide was synthesized within a short time with iron (II) chloride and sodium hydrogen carbonate precursors through air oxidation method. Date-palm (Phoenix dactylifera) seeds charcoal was also prepared and used as composite with the goethite. Physico-chemical properties such as the pH, moisture content, percentage yield, bulk density and pH were investigated.pzc Instrumental characterization such as Fourier Transform Infrared (FTIR) for the surface functional groups, Scanning electron microscopy (SEM) for the shapes and morphology of both samples, X-Ray Fluorescence (XRF) to obtain the elemental composition, BET surface area determination and particle nano-sizer to determine the size of the particles were carried out. The results obtained showed that pH values were 8 and 7 pzc for goethite and composite respectively. The main surface functional group from FTIR and major element obtained from XRF in both samples is the OH group and iron (Fe) respectively. The SEM results for goethite and the composite particles showed high porosity in their structure which enables them to bind easily with other 2 materials. BET revealed that the surface area of the goethite and the composite is 797.662 and 329.866 m /g respectively. The nano-sizer also revealed a near nano-size for the synthesized goethite with particle size of about 172-173 nm. Based on the results obtained, the synthesized goethite and the prepared composite will find applications in various analytical and chemical procedures.

This research was embarked upon to assess the changes in the physical and chemical properties of piped-borne water supplied in Kano metropolis from the treatment plants(challawa and tamburawa plants), along the distribution lines to the various points of use. Samples of piped water were collected from selected points of use (zones) including raw and treated water from the treatment plants and analyzed for selected physical parameters-pH, alkalinity, conductivity, turbidity, total dissolved solids, total suspended solids and chemical parameters-chlorides, sulphates, nitrates, nitrites and trace metals which includes sodium, potassium, calcium, magnesium, lead, cadmium, chromium, manganese, iron, nickel, zinc, and copper. The results show that all the physical parameters were within the world health organization WHO acceptable limits with the exception of turbidity and total suspended solids of sharada zone with 208 NTU and 193mg/L respectively. All the chemical parameters were within the thresholds limits including all the metals analyzed which were present in concentrations permitted by the WHO for a quality drinking water. Mean concentration of some of the metals were found as follows: Pb (0.0021± 0.

A B S T R A C TEosin Yellow (EY), an anionic dye (acid dye) was adsorbed using an agricultural waste, pineapple peels (PP) as bio-sorbent in order to investigate its suitability as an alternative adsorbent, and to give insight into the mechanisms of binding. The study includes: equilibrium isotherms and thermodynamics studies. The adsorption isotherm and thermodynamics experiments were conducted using batch equilibrium techniques. The adsorption data were fitted into Langmuir, Freundlich and Temkin isotherm models; as a result, the data fitted well into the Langmuir model from which the adsorption capacity, qe was obtained as 11.76 mg/g. Experimental values of the thermodynamics parameters (ΔH, ΔS and ΔG) and separation factor (RL) in combination suggested that the adsorption process was endothermic, feasible, spontaneous, and had high degree of freedom. Combined results of the isotherms and thermodynamic study suggested a physisorption-chemisorption mechanism for the adsorption process. Therefore, the results of the study could provide useful information to evaluate the raw pineapple peel powder as a cheap source of adsorbent for the removal of EY from waste water.

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