
Sani YahayaBayero University Kano · Department of Microbiology
Sani Yahaya
Doctor of Philosophy
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51
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Publications (51)
Chromium contamination primarily originates from anthropogenic activities such as industrial discharges, mining operations, and the improper disposal of chromium-containing products, leading to its infiltration into soil and groundwater. The persistence of chromium in the environment poses severe ecological and health risks, including bioaccumulati...
The study determined the ability of some selected indigenous microbial isolates, namely Bacillus subtilis, Zymomonas mobilis and Saccharomyces cerevisiae, in the production of bioethanol from the fruits of some exotic plants (i.e. Ixora coccinea, Duranta repens and Syzygium guineense). B. subtilis was isolated from soil, while Z. mobilis and S. cer...
In this study, we investigated the heavy metal absorption of Alcaligenes faecalis strain U.B.I., a bacteria isolated from a mining site, under different environmental conditions. We utilized both conventional and molecular techniques to identify the bacteria and employed response surface methodology (R.S.M.) to determine optimal environmental condi...
Kaolin is a naturally occurring raw material for several industrial applications. Moreover, the economy of using Kaolin has some restrictions due to presence of iron-bearing impurities in form of oxides and hydroxides. This has a negative effect on the whiteness and refractoriness of some products and the production of high purity ceramics. The app...
Filamentous fungi offer an interesting biocontrol alternative. Trichoderma, mycorrhizal, and endophytic fungi are the main filamentous fungi used to induce nematode resistance. They can reduce plant-parasitic nematode damage by producing lytic enzymes, antibiosis, paralysis, and parasitism. They minimize space and resource competition by increasing...
Biosurfactants are diverse and heterogeneous group of microbial metabolites produced by certain bacteria and fungi that have both hydrophilic and hydrophobic components. This work was aimed at assessing the production, stability and optimization of rhamnolipid biosurfactant production conditions by Enterobacter cloacae AYF1 strain. Biosurfactant pr...
Water quality is essential to human health and well being and therefore it required adequate and effective methods for consumption. The main aim of this study is to make a comparative analysis of the Sokoto State water board and other water resources at Sokoto State University. Physicochemical analysis and mineral content of the water samples was c...
ABSTRACT
Biosurfactants are surface-active biomolecules produced by microorganisms that have different applications in solving many environmental problems. This study was carried out to screen biosurfactant producing bacteria isolated from hydrocarbon contaminated soil of Kano Metropolis, Kano State- Nigeria. Soil samples were collected and process...
ABSTRACT
Biosurfactants are structurally diverse surface-active agents mostly produced by various genera of bacteria, yeast and filamentous fungi that have wide range of applications and properties. They have surface and interfacial activity, temperature and pH tolerance, biodegradability, low toxicity and anti-adhesive property. Their production w...
Development of resistance against the frontline anti-malarial drugs has created an alarming situation, which requires intensive drug recovery to develop new, more effective, affordable and accessible anti-malarial agents. Plants as Senna occidentalis produce a wide variety of phytochemical constituents, which are secondary metabolites and are used...
Soil contamination by spent engine oil from mechanical parts of machines is a growing concern in many countries. Biostimulation of contaminated soil with agro-waste like Citrullus lanatus (water melon) and Citrus sinensi (orange) peels offers an environmentally friendly and cost-effective method for remediating the contaminated soil. In this study,...
In environmental bioremediation applications, microorganisms can be supported on solid agro-wastes to provide the required macro and micro nutrients required for biofilm formation. This research was aimed at assessing the effect of Citrullus lanatus (watermelon) and Citrus sinensi (orange) peels in biostimulation of hydrocarbon utilizing bacteria i...
Background:
Mining for precious metals is detrimental to the composition of soil structure and microbial diversity distribution and is a health risk to human communities around the affected communities. This study was aimed at determining the physical and chemical characteristics and diversity of bacteria in the soil of local mining sites for bios...
The use of biological molecules to control pollutants, especially heavy metals that pollute our atmosphere, is gaining traction. In this study, simulation and optimization of process parameters using one-factor-at-a-time and response surface methodology (RSM) were employed to assess conditions for heavy metal tolerant bacteria isolated from local m...
The use of biological molecules to control pollutants, especially heavy metals that pollute our atmosphere, is gaining traction. In this study, simulation and optimization of process parameters using one-factor-at-a-time and response surface methodology (RSM) were employed to assess conditions for heavy metal tolerant bacteria isolated from local m...
Tannery waste is made from nutrients and organic compounds that enhance soil fertility thereby improving plants and microbial growths. This study was designed to investigate the application of tannery wastes to form compost material in a mixture with cow-dung and rice brand. The treatments were prepared and tested for a period of sixty (60) days. T...
Lactic acid bacteria can inhibit other microorganisms or reduce their growth in a medium through their metabolites or other toxic antimicrobial components such as bacteriocins, organic acids, diacetyl or indirectly by changing pH, osmotic pressure and surface tension. Microbes exerting such effect are said to be antagonistic against the organisms t...
Herbicides are commonly used to control weeds in crop production. In addition, herbicides influence soil microorganisms responsible for numerous biological processes and crop production. This study was done to determine the physicochemical property of top soil, assess the effect of herbicide application on bacterial load and identify the bacteria p...
Heavy metals are toxic and detrimental water pollutants. The continuous discharge of cadmium (Cd) and lead (Pb) containing effluents from industries within and around residential areas in Nigeria is worrisome since they do not only affect human beings, but also beneficial microbes, animals and vegetation due to their mobility in aqueous ecosystem, toxi...
Bioremediation using bacteria serves as an important tool in managing heavy metal pollution which already is an environmental health concern all over the world. The aim of the study was to isolate and assess Chromium (Cr) bioremediation potential of bacteria isolated from tannery effluent. The effluent samples were taken from Challawa Industrial Es...
Aim: In this study, Aeromonas spp. isolated from soil of local mining sites were assessed for their tolerance to some heavy metals and their capability for its uptake. Materials and Methods: The bacteria were isolated from soil of local mining site in Bagega District of Zamfara State in Nigeria. Maximum Tolerable Concentration (MTC) was employed to...
The tannery waste contain utilizable nutrients and toxic organic compound which might affect soil processes and plants growth, and pathogens which might pose a threat to the local environmental communities. The study was designed to investigate the development of tannery waste collected from Unique leather finishing company Sharada, Kano, Nigeria,...
Abstract: The current work was designed to assess the effect of modification of model digester on the kinetics that affects efficiency in biogas generation using bovine rumen content as the feedstock. A biogas plant consisting of conventional and modified fixed-dome digesters (each with 2 m3 capacity) was established; and bovine rumen content was u...
This study determines the microbiological and physicochemical quality of well water samples in relation to their proximity to pit latrine in four Local Government Areas of Kano Metropolis. A total of 32 water samples were collected and analyzed for aerobic mesophilic bacterial count, fungal, coliform and faecal coliform count. The physicochemical p...
ABSTRACT Silica sand is generally not pure when mined; often associated with iron hydroxide and oxy hydroxide impurities which lowers its industrial value and requires purification before use. To join the global community towards environmental consciousness, protection and effective energy utilization, this paper considers microbial purification in...
An explosion in the world’s population has led to an increase in the demand for crude oil and its products resulting in an increased environmental pollution and thus leading to loss in biodiversity. Environmental reclamation by natural technique is believed to be eco-friendly and cost effective. This research investigated the biodegradation of crud...
The study aimed at evaluating biogas production potential of three different grasses co-digested with horse dung under anaerobic condition. Pennisetum pedicellatum, Striga hermonithica and Commelina benglensis were collected, identified and subjected to proximate analysis. Different concentrations were subjected to anaerobic digestion over a period...
This study was conducted to isolate antibiotic producing fungi in soil samples collected from Bayero University, Kano. Soil samples were suspended in deionised distilled water and inoculated on potato dextrose agar (PDA) by spread-plate method for the isolation of fungi. Primary screening of antibiotic producers was conducted using agar well diffus...
Spent motor oil represents one of the most prominent and tenacious contaminants of soil within mechanic workshops across Nigeria. Adaptation and natural evolution proffer a rich array of a microorganism capable of producing bio-surfactants which are of high value to industry, particularly in hydrocarbon degradation. This study was undertaken to iso...
Elevated levels of petroleum hydrocarbon and certain heavy metal compounds in soil samples due to environmental and manmade operations can amount to concentrations considered as toxic. Soil samples from 3 different locations, 30 meters from each other were collected and assessed for polycyclic aromatic hydrocarbon (PAH), total petroleum hydrocarbon...
Physicochemical and bacteriological analyses were carried out on well water samples from the eight selected locations within the industrial area of Kano Metropolis namely Bompai, Sharada, Chalawa and Jaba (a non-industrial area) serving as control, using the standard methods. The results obtained were compared with the World Health Organization and...
Background
Continue rise in unprofessional use of antibiotics in our hospitals and communities is worrisome. A research study was therefore conducted to detect extended spectrum beta-lactamase (ESBL), carbapenemase, metallobeta lactamase and their co-production phenotypically from isolates obtained from patients admitted to or attending two tertiar...
This paper presents a feasibility study on pre-treatment of personal care products (PCP) industrial effluents. The study employed single-stage foam fractionation as pre-treatment method. Three synthetic waste streams: shampoowith-silicon, sh(+si), shampoo-without-silicon, sh(-si), and hair dye (ec) were used in the study. Chemical oxygen demand (CO...
Background: The need for new therapeutic compounds against malaria parasite is made more urgent by continued spread of resistance to almost all available anti-malarial drugs. This study was aimed at evaluating the phytochemistry and antiplasmodial properties of ethylacetate and n-hexane stem bark extracts of Vitex simplicifolia against the malaria...
Background: This study was aimed at evaluating the phytochemistry and antiplasmodial properties of the n-hexane and ethylacetate stem bark extracts of Vitex doniana against the malaria parasite; Plasmodium falciparum. Methods: Extraction, Phytochemical detection followed by antiplasmodial sensitivity test was carried on the two extracts of V. simpl...
This study investigated borehole waters located within the industrial areas of Bompai, Sharada (Sabuwar gandu), Challawa (Tsamawa) and Jaba (a non-industrial area-serving as control) with a view to determine their physicochemical and bacteriological qualities. A total of Eight (8) boreholes (two from each location) were sampled and the water analyz...
This study was aimed at evaluating the phytochemistry and antiplasmodial properties of the aqueous and methanolic leaf extracts of Jatropa curcas against the malaria parasite; Plasmodium falciparum. The need for new therapeutic compounds against malaria parasite is made more urgent by the continued spread of resistance to almost all the available a...
This research was carried out to investigate the antimalarial activity of Vitex doniana leaf extracts against Plasmodium parasite. The powdered leaf material of the plant was extracted using water and methanol. These extracts were assayed at various concentrations (10mg/ml, 5mg/ml, 2.5mg/ml and 1.25mg/ml) for anti-malaria activity against Plasmodiu...
Seroprevalence and risk factors of toxoplasma gondii infection (toxoplasmosis) among hiv seropositive pregnant women in a tertiary healthcare centre, Kano, Northern Nigeria Abstract Toxoplasmosis caused by an obligate intracellular Protozoan, Toxoplasma gondii has emerged as an important cause of opportunistic infection in HIV/AIDS resulting in sev...
ABSTRACT
Climate change resulting from global warming is attributed to anthropogenic influences, leading to many consequences, one of which is flooding. It is one of the major environmental crises that keep recurring every year in Nigeria from one region to another. Although flooding is a natural phenomenon caused by antecedents such as melting of...
This study reports the investigation and application of gamma proteobacteria of the Shewanella genus, Shewanella putrefaciens CN32 bacterium, applied as a prototypical dissimilative bacterium for the remediation of Au3+, Co2+ and Fe3+ ions in aqueous systems. Green chemistry principles were applied to the remediation process, that no chemicals are...
The commercial value of kaolin raw materials is greatly affected by the presence and content of iron-bearing impurities, which can have a detrimental effect on the whiteness and refractoriness of manufactured products. Because of the high cost and environmental impact of techniques currently used to remove these impurities, some effort is now targe...
Biogeochemical evidence exists to support the potential importance of
crystalline or amorphous Fe minerals as electron acceptor for Fe
reducing bacteria in soils and subsurface sediments. This microbial
metabolic activity can be exploited as alternative method in different
industrial applications. For instance, the removal of ferric iron
impurities...
Water, methanolic and chloroform extract of Combretum micrantum leaf were separately tested, in-vitro, using paper disc method of assay on Staphylococcus aureus, Streptococcus pyogenes, Pseudomonas aeruginosa, Klebsiella aerogenes and Esccherichia coli. Active concentration of 200mg/l, 250mg/ml, 300mg/ml, 350mg/ml, 400mg/ml and 500mg/ml were held f...