Onimisi J.A.,Universiti Sains Malaysia |
Onimisi J.A.,Federal University, Lokoja |
Ismail R.,Universiti Sains Malaysia |
Ariffin K.S.,Universiti Sains Malaysia |
And 2 more authors.
Korean Journal of Chemical Engineering | Year: 2016
Various techniques and approaches have been designed to synthesize precipitated calcium carbonate. We used a continuous sprayed-mist technique that induced spontaneous precipitation reaction of the droplets with the higher surface area when in contact with the gas. The effects of optimum reactant concentration, gas flow rate, and reactant feeding rate including reaction conditions were investigated. The effectiveness of the techniques was scrutinized by analyzing the resultant PCC characteristics, especially the particle phase morphology and size distribution using XRD, FTIR, and SEM. The variation of initial concentration of milk of lime with different gas flow rate was studied. Experimental results, as well as XRD and FTIR, indicated that all the products produced were favorable for the formation of calcite. SEM revealed that the morphologies of PCC were all rhombohedral and tended to adhere to each other (twinning). It was found that production of PCC by using spray-mist method is suitable for lower initial concentration of Ca(OH)2 and higher gas flow rate only. © 2016 Korean Institute of Chemical Engineers, Seoul, Korea
Toyin A.,Federal University, Lokoja |
Ayinla H.A.,University Of Ilorin |
Adekeye O.A.,University Of Ilorin |
Bale R.B.,University Of Ilorin
International Journal of Earth Sciences and Engineering | Year: 2014
Illela borehole in the Sokoto Basin has a total depth of 100.7m with three distinct lithologies; 36.30mthick calcareous and variably coloured greyish-dark shale of Dange Formation, succeeded by a 31.44m thicklimestones of Kalambaina Formation with 1.7m thick shaly limestones inclusive. The uppermost part of the sectionbelongs to the Gwandu Formation which consists of intercalation of silty-clay, muddy-siltstones and well lithifiedironstone. The borehole section is delineated into upper foraminifera and lower ostracod biostratigraphic units as noformal biostratigraphic zonation could be attempted due to low diversity of both benthic foraminifera, marineostracods and the absence of planktonic foraminifera. The similarity of the ostracod assemblages between NorthAfrica (Libya), Iullemeden Basin (Illela borehole, NW Nigeria, Mali and Niger Republic) and South-WesternNigeria suggests that a marine connection exists between the Gulf of Guinea and the Sokoto Basin via the areaoccupied by the River Niger during the Paleocene. © 2014 cafet-innova technical society.
Adam S.U.,Federal University, Lokoja |
Shamsudin M.N.,University Putra Malaysia |
Sidique S.F.,University Putra Malaysia |
Rahim K.A.,University Putra Malaysia |
Radam A.,University Putra Malaysia
Resources, Conservation and Recycling | Year: 2015
Pollution concern has been established as an important predictor of economic value ascription related to solid waste service improvement, such as recycling. However, the variable is not directly observable and as such, its influence is captured by existing applied economics papers via "yes" or "no" discrete-nominal measure. Such measure assumes the variable has one dimension. This leads to loss of information, considering its multi-dimensional structure in theory. It thus implies that, if a respondent in an economic valuation study indicates a support for an improvement signified by a "yes" response to valuation question, a uni-dimensional dummy variable cannot tell what dimension of concern the respondent subscribes to. Despite this importance of understanding the variable's dimension, it has rarely been explored. This study investigates such dimensions and our findings support the existence of both the theoretically espoused dual and tripartite factor models. This implies a possible misspecification in existing solid waste related studies that have most often captured the variables via uni-dimensional nominal-discrete measure. © 2015 Published by Elsevier B.V.
Adang K.L.,Federal University, Lokoja |
Asher R.,Gombe State University |
Abba R.,Gombe State University
Asian Journal of Poultry Science | Year: 2014
A study was conducted to determine the prevalence of gastro-intestinal helminths in domestic chickens and ducks slaughtered at the Gombe main market, Gombe State, Nigeria. Faecal samples from 150 chickens and 150 ducks, comprising of 75 male and 75 female samples of each host species, were collected from the dressing unit of the market and examined in the laboratory for helminths, using the intestinal scrapping method. The overall prevalence of helminths was 81.0% in chickens and 4.7% in ducks. More infections with cestodeswere recorded in both host species. The helminths identified from chickens comprised Railleitina tetragona 52 (34.7%), R. cesticillus 32 (21.3%), R. echinobothrida 38 (25.3%), R.magninumida 5 (3.3%), Amoebotaenia cuneata 6(4.0%), Hymenolepis carioca 18 (12.0%) and Ascaridia galli 16 (10.7%), while helminths identified from ducks comprised R. cesticullus 4(2.7%), R. magninumida 5(3.3%), Hymenolepis carioca 2 (1.3%) and Ascaridia galli 1 (0.7%). The males of both host species 67 (89.3%) and 4(5.3%), respectively were more infectedthan the females 55 (73.3%) and 3 (4.0%), respectively. Chi square test revealed no significant difference (p>0.05) in the infection rates between the sexes. Eighty (53.3%) of the chickens had single infections, 38 (25.3%) had double infections and 4 (2.7%) had triple infections while in ducks, 3 (2.0%) had single infections, 3 (2.0%) had double infections and 1 (0.7%) had triple infection. The study revealed that helminths are common parasites of chickens and ducks in Gombe and could be an impediment to their production in the area. © Academic journals Inc.
Musa O.K.,Federal University, Lokoja |
Kurowska E.E.A.,University of Silesia |
Schoeneich K.,Ahmadu Bello University |
Alagbe S.A.,Ahmadu Bello University
Environmental Earth Sciences | Year: 2015
Mud volcanoes grouped into 14 fields are found in southern Gombe, part of the Cretaceous Upper Benue Trough filled with Early Cretaceous continental deposits and Late Cretaceous marine deposits, having a history of magmatism dating from Albian to Pleistocene. They are mostly of small sizes, having cones not exceeding one and half metres in height and diameters ranging from 0.5 to 8 m at base, as well as pools with muddy water and mudflows were encountered. Results of the study show that the cationic and anionic concentration varies as follows: Ca2+ (8.26–46.4 mg/l), Mg2+ (1.16–20 mg/l), Na+(18.6–4789 mg/l), K+ (9.4–134 mg/l), Fe (0.02–5.74 mg/l), HC3 − (126–3111 mg/l), Cl– (5–2625 mg/l), SO4 2– (12.5–16.9 mg/l), CO3 2– (3–2040 mg/l) and SiO2 (7–45.6 mg/l). The study also reveals that the water issuing from the mud volcanoes, in most cases, is highly alkaline (pH ranges from 7.94 to 8.99), saline (TDS varies from 140 to 1620 mg/l), very hard (TH varies from 102 to 1180 mg/l) and belongs to five hydrochemical facies, namely: Na–HCO3, Na–HCO3–Cl, Na–Ca–HCO3, Na–Cl–CO3–HCO3 and Ca–Na–HCO3. The dominant hydrochemical facies is Na–HCO3 while Ca–Na–HCO3 is the minor water type. Statistical correlation reveals positive correlation between most of the parameters. With the exception of Ca2+, Mg2+ and SO4 2−, all other parameters are far above the World Health Organisation standards for drinking water. These waters are mineralised and are not considered to be suitable for drinking and domestic purposes, but may be considered for therapeutic purposes. © 2015, Springer-Verlag Berlin Heidelberg.