studies of disinfection by-products and heavy metals in ahmadu bello university drinking water supplies and operations of some treatment plants
This study had a broad objective of determining the quality of drinking water produced by Ahmadu Bello University (ABU) water treatment plant. Its samples were chemically analysed for general chemical properties, heavy metals and Disinfection By-Products (DBPs) content in accordance with standard analytical methods and USEPA methods 551.1 and 552.2... Continue Reading
the effect of chromium and manganese on the mechanical properties and corrosion resistance of al-si-fe alloy in 0.5m hcl solution
The effect of chromium and manganese on the mechanical properties and corrosion resistance of Al-Si-Fe alloy was investigated. Alloys of varying percentages of Chromium and Manganese from 0.1 to 0.5% (0.1, 0.2, 0.3, 0.4, and 0.5%) with the percentages of iron and silicon kept constant were sand cast into cylindrical test bars of dimension 20mm by 3... Continue Reading
modeling and simulation of a solar powered adsorption refrigeration system
The search for renewable, eco-friendly energy source other than fossil fuels which is ozone depleting and responsible for climate change to power refrigeration systems has led to the present research. The modeling and simulation of a solar powered adsorption refrigeration system using three types of collectors (flat plate, evacuated tube, and parab... Continue Reading
modeling of water quality of bindare stream in zaria-nigeria using matlab
The objective of this study was to develop a MATLAB based simulation modeling using SIMULINK tools that produced dissolved oxygen sag curve, and applied it to Bindare stream in Zaria, Kaduna State-Nigeria, in order to assess the stream dissolved oxygen level and its self-purification capacity as a mitigation measure in stream pollution control.. La... Continue Reading
the inadequacy of earthing in building structures
(A CASE STUDY OF ZARIA)
Earthing and lightning protection systems protect people from the danger of electrocution and equipment from over-voltages by dissipating the excess energy into the earth, and at the same time reducing the potential difference between equipment and earth. This study investigated the effect of lightning strikes on people, buildings, communication to... Continue Reading
effect of pre-ageing conditions on the hardness and corrosion characteristics of double-thermally aged al-si-mg alloy
The effect of pre-ageing condition on the hardness and corrosion characteristics of doublethermally aged treatment (DTAT) chill cast Al-Si-Mg alloys in simulated seawater environment using elemental sodium-modifier has been studied. This was with a view to improving the precipitation response and corrosion resistance of the Al-Si-Mg alloy. The temp... Continue Reading
enhancing light-ends recovery through joint atmospheric distillation of heavy crude and used engine oil
Heavy crude oils are known to contain significant amount of high molecular-weight substances such as asphalthenes and resins hence, when refined, produce low amount of lightends (gasoline, kerosene and diesel fractions). Compared with light crude oils, as a refinery feed stock this singular reason coupled with difficulty of processing has made heav... Continue Reading
mathematical modeling and dynamic simulation of temperature distribution in a chamber furnace
Chamber furnaces are widely used in heat treatment. The correct prediction of the temperature variation and distribution within the chamber is of high significance to ensure good quality of the products being fired and reduce energy consumption. A software by trade name COMSOL was used to model and simulate the temperature distribution in a chambe... Continue Reading
mathematical modelling of draught characteristics of selected animal-drawn implements on the upland soils of samaru, nigeria
A study on the mathematical development of draft model for two animal-drawn tillage implements was conducted on the upland soils of Samaru, Zaria for three years (2008 �“ 2010). The draft characteristics considered include soil moisture content, bulk density, speed of operation, tillage depth and mass of the implement. Two white Fulani bulls were ... Continue Reading
effects of beneficiation and salting agents on yield and quality of alum from kankara kaolin
Alums are very important products because of their vast array of uses. In this investigation, about 91% kaolinite fraction was recovered from Kankara kaolin after beneficiation. The silica-alumina ratio of 2:1 obtained after calcination conformed to typical literature values. The raw clay yielded 72.91% alum (in terms of % wt of alumina extracted f... Continue Reading
state space controller design for a dc motor
Modern manufacturing systems are automated machines that perform the required task. The DC motor is perhaps the most widely used industrial energy converter whose performance decrease over time. In this work, an experimental data is used to create a mathematical model of the DC motor for performance analysis. Using state space analysis and Matlab, ... Continue Reading
pollution and self purification studies of river romi, chikun local government area kaduna state
Angwan Romi is a place in the Chikun Local Government Area of Kaduna State in Nigeria at 10�25'48 north of the equator and 7�25'12 east of the Greenwich Prime Meridian. Romi River is a body of running water moving to a lower level in a channel on land. It is on Latitude 10.45 decimal degrees, Longitude 7.37 decimal degrees, DMS Latitude 10� 27 m... Continue Reading
distribution of engineering properties of soils used in highway construction
(A CASE STUDY OF NIGERIA)
Areas with alluvium (Qa) soil from the Quartenary Era, have A-2-4, A-2-6, and A- 2-7 classifications according to the AASHTO Soil Classifications, while areas with sands and clays (Qp) from coastal plain sands are mainly classified as A-7-5, and A-7-6 with few locations having A-2-4, A-2-6, and A-2-7 classifications. Also, sands and clays (Qc) from... Continue Reading
effect of locust bean waste ash on lime modified black cotton soil
Black cotton soil classified as an A-7-6(24) soil on the AASHTO classification collected from New Marte area of Borno State was modified with up to 4% lime and locust bean waste ash (LBWA) up to 8% by weight of dry soil. The effect of LBWA on the lime modified soil was studied with respect to particle size distribution, Atterberg limits, compaction... Continue Reading
effect of locust bean waste ash on cementmodified black cotton soil
Black cotton soil classified as an A-7-6 (24) soil on AASHTO classification collected from new Marte area of Borno state was modified with up to 4% cement and LBWA up to 8% by weight of the soil. The effect of locust bean waste ash (LBWA) on the cement modified soil was studied with respect to particle size distribution , Atterberg limits, compacti... Continue Reading
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