Renner Nrior

Rivers State University | RSUST · Department of Applied And Environmental Biology

Oil spills are a significant environmental concern, particularly due to the potential toxicity of the oil dispersants used for remediation. This study investigated the ecotoxicity of the oil spill dispersant Sea Care on Nitrobacter vulgaris and Nitrosomonas halophila which play key roles in the nitrogen cycle. The bacteria were isolated from water...

Aquatic ecosystems have been shown to be adversely affected by pesticides such as Gammalin 20, which can have an adverse effect on primary and secondary producers. This study investigated the ecotoxicity of gammalin 20 on Nitrobacter vulgaris and Nitrosomonas halophila in Freshwater, Marine water and Estuarine water samples collected from Adoni Loc...

In Nigeria, Cassava processing and its associated waste have been a source of worry regarding environmental pollution. Uncontrolled disposal of the waste has contributed to a number of environmental concerns including fluxes in microbial population. However, the liquid wastes squeezed out during the processing of cassava have been discovered to be...

The aim of this research were to determine the antibiogram and effects of methanolic turmeric extract and alum on Escherichia coli in some borehole and sachet water in Rivers State respectively. The various concentrations (100mg/ml,50mg/ml,25mg/ml and 12.5mg/ml) of these combinations, methanolic turmeric extract, Alum, MTE+ Alum were tested respect...

Aquatic nitrogen-fixing bacteria play a crucial role in maintaining the nitrogen cycle and supporting primary productivity in freshwater and brackish water ecosystems. The activities of oil and gas industries operating within the coastal region of PortHarcourt releases effluents that contain various chemicals including corrosion inhibitors into the...

Environmental pollution in the Niger Delta has been a huge concern. Bacteria have proven to be of great benefit in the degradation of petroleum hydrocarbons. This research is aimed at enhanced phytoremediation of crude oil polluted soil using Pseudomonas fluorescens. Soil was collected from oil spill polluted site at B-dere, Rivers State. Six (6) t...

To compare and assessment of Biodegradability Potential of Pseudomonas putida and Bacillus amyloliquefaciens on oil spill dispersant (Aquabreak and Teepol) in Freshwater. Fresh water sample were collected from Biara, Gokana L.G.A, and were transported to the Microbiology Laboratory of Rivers State University, Port Harcourt, Nigeria for analyses whi...

The study evaluates the destructive potential of some Pseudomonas species implicated as the causal agents of brown blotch disease in Pleurotus ostreatus (Jacq) P. Kumm. The study was designed to isolate and identify the causal agents of the bacterial brown blotch of P. ostreatus and evaluate the effect of the pathogen on the mushroom. The P. ostrea...

This study evaluated the microbiology and level of PAH contamination of Pomadasys commersonnii and surface water along Ikpukulu Creek in Borikiri. Standard microbiological procedures were used to assess and identify total heterotrophic bacteria (THB), total fungi and hydrocarbon utilizing bacteria (HUB) and fungi (HUF). PAHs were analyzed using...

Aim: This study was carried out to investigate the Susceptibility of Candida albicans, Staphylococcus aureus and Escherichia coli to extracts from young and mature mango (Magnifera indica) leaves and stem-bark of the same plant. Study Design: The study employed statistical analysis of the data and interpretation. Place and Duration of Study: Young...

Aim: To evaluate the bioremediation potential of algae (Chlorella vulgaris) in crude oil contaminated sediment. Study Design: The study employs three (3) experimental designs using flat rubber, statistical analysis of the data and interpretation makes up the study design. Place and Duration of Study: New Calabar River, Choba, Obio Akpor Local Gover...

Aim: The aim of this study was to isolate and characterize the culturable endophytic bacteria from the roots and leaves of three different mangrove plants found growing in same environment. Study Design: This study employs experimental design, statistical analysis of the data and interpretation. Place of Study: The roots and leaves of three mangrov...

Aim: Assessment of In vitro and In vivo Control of Fungal Cobweb Disease of Pleurotus ostreatus (Jacq), using organic materials. Study Design: This study was designed to control the disease by using plant materials as organic control agent; both In vitro and in vivo. Methodology: In Pleurotus ostreatus. In the In vitro test; food poison method was...

Aim: The study was aimed to determine the toxicity of paraquat dichloride and lambda-cyhalothrin on phosphate solubilizing bacteria, Pantoa dispersa in aquatic ecosystems. Study Design: This study employs randomized block design, statistical analysis of the data and interpretation. Place and Duration of the Study: Soil sample was collected from the...

Aim: This study was aimed at identifying bacterial and fungal contaminations in used face masks from different secondary schools in Port Harcourt during COVID-19 Era Study Design: The study employs statistical analysis of the data and interpretation. Place and Duration of Study: Five Secondary Schools–Three public schools: Federal Government Colleg...

Aim: This study was carried out to investigate the antibacterial properties and efficacy of mango (Mangifera indica) leaf extracts on some clinical isolates as test rganisms. Study Design: The study employed statistical analysis of the data and interpretation Place and Duration of Study: Young and mature mango leaves were collected from the Botanic...

Aim: To assess the effect of the hydrocarbon discharges from the artisanal refineries on the community structure of microbial mats in an aquatic environment Study Design: The study employs experimental design, statistical analysis of the data and interpretation. Place and Duration of Study: The microbial mats, surface water and sediments samples we...

Aim: The aim of this study is to screen and determine the biodegradation potential of the endophytic bacteria isolated from roots and leaves of mangrove plants. Methodology: In this work were isolated, identified and screened endophytic bacteria from roots of Rhizophora mangle, Avicennia germinans and Acrostichum aureum; the three major species of...

B-Dere is one of the communities in Ogoniland and a major oil producing area in Rivers State where oil exploration and production activities commenced 50 years ago and is now characterized by oil fields and installations that have remained dormant for several decades. Past spills, lack of maintenance, oil trapping and damage to oil infrastructures...

Aim: The aim of this study was to isolate, enumerate, identify and ascertain the antibiotic profile of the bacterial isolates associated with key body parts (Cut stalk, Tip, Endocarp, Vascular Tissue and Epicarp) of Banana fruits (Cavendish, Dwarf Cavendish, Red, Lady Finger and Grand Nain Banana) collected from Port-Harcourt, Rivers State. Study D...

Aim: The aim of this study was to carry out microbiological assessment on Stalk, Endocarp, Epicarp, Tip and Vascular Tissue of Different Varieties of Banana fruit (Musa spp.) (Cavendish, Dwarf Cavendish, Red, Lady Finger and Grand Nain Banana). Study Design: The study employs statistical analysis of the data and interpretation. Place and Duration o...

Aim: To evaluate Enhanced-Biodegradation and Release Pattern of Heavy Metal from Spent Laptop Batteries using Pseudomonas and Bacillus species in Freshwater Study Design: The study employs experimental design, statistical analysis of the data and interpretation. Place and Duration of Study: Freshwater was collected from Isiokpo River, Isiokpo town...

Aim: To assess the Mycoremediation potential of Mucor racemosus and Aspergillus niger in open field crude oil contaminated soils in Rivers State, Nigeria.

Aim: The aim of the study was to assess Percentage Bioremediation of Spent Mushroom Substrate (SMS) and Mucor racemosus in hydrocarbon contaminated soil Place and Duration of Study: A portion of Rivers State University demonstration farmland in Nkpolu-Oroworukwo, Mile 3 Diobu area of Port Harcourt, Rivers State was used for this study. The piece of...

The toxicological bioassay of petroleum products (industrial and local 'kpo-fire' refined Kerosene) in tri-aquatic ecosystem (marine, brackish and freshwater) using pollution bio-monitor Pseudomonas sp. were investigated. The study employs experimental examination and statistical analysis of data and interpretation. It was designed to evaluate the...

Antibiotic resistance has become a great global problem. Thus, it has emerged as a public health challenge. The antibiotic susceptibility pattern of bacteria in well water was characterized with a view of determining the level of resistance in the environment. Fifty well water samples were collected from ten different points in Ula-Ubie community,...

The resistance of bacteria to vancomycin has made the treatment of some infections more difficult to handle. The aim of this study was to isolate and molecularly characterize vancomycin resistant bacteria in selected well water with a view of determining the level of resistance in the environment. fifty (50) well water samples were collected from t...

Aim: This study aimed to evaluate the ability of Fish waste and Goat manure to bio-stimulate the degradation process during bioremediation of crude oil-contaminated soil. Study Design: Research was designed to evaluate and compare the strength of the organic nutrients (Goat manure and fish waste) to stimulate the biodegradation of crude oil contami...

Aim: The aim of the study was to evaluate the impact of organic nutrient supplements and bioaugmenting microorganisms on crude oil polluted soils. Place and Duration of Study: Faculty of Agriculture Demonstration Farm, Rivers State University, Port Harcourt Nigeria. Methodology: Baseline study of a deliberately polluted agricultural soil was invest...

Aim: To assess the Bioremediation efficiency of Bacillus amyloliquefaciens and Pseudomonas aeruginosa strain CL 9 with nutrient amendment using bio-stimulating agents such as Fish waste and Goat manure on crude oil polluted soils in Rivers State, Nigeria. Study Design: The study employs experimental design, statistical analysis of the data and inte...

Aim: To investigate eco-toxicity of local and industrial refined kerosene on pollution bio-monitor Pseudomonas sp. in tri-aquatic ecosystem (Marine, brackish and freshwater). Study Design: The study employs experimental examination and statistical analysis of the data and interpretation. It was designed to evaluate the different kerosene concentrat...

Aim: Microbial air quality over illegal refuse dump sites in Port Harcourt, Nigeria, was conducted to assess the aero-microbial contaminant of dumpsite to the closest neighbourhood and the harmful distance. Place and Duration of Study: The dump sites were located at oil mill market (Latitude 4.8578 N4°51'28.06344'' Longitude 7.06653 E7°3'59.50152''...

Aim: The aim of this study is to enhance the biodegradation of degreasers used in upstream sectors of Nigeria Petroleum Industry using bio-augmenting organisms such as: Pseudomonas and Bacillus species in freshwater Ecosystem. Study Design: This study employs experimental designs, Randomized Block Design treatment set up, statistical analysis of da...

Aim: To investigate bioremediation potentiality of Pseudomonas aeruginosa KX828570 on crude oil Polluted Marshland and Terrestrial Soil treated with oil spill dispersant Study Design: The study employs experimental design, statistical analysis of data and interpretation. Place and Duration of the Study: Soil samples were collected from K-Dere, Goka...

Evaluation of biodegradation potentials of two fungal species (Aspergillus niger and Rhizopus arrhizus) isolated from a crude oil spilled site in Rivers State. The experimental setup was done to determine degradation rates of fungal species during an incubation period of 28days. Total Petroleum Hydrocarbon content was taken on a biweekly basis whil...

Aim: To evaluate the effect of locally refined diesel and kerosene on Aspergillus niger a key fungal pollution biomarker in three aquatic bodies (marine, brackish and freshwater). Study Design: The study employs experimental examination and statistical analysis of the data and interpretation. Place of Study: Fresh water, brackish water, and marin...

ABSTRACT Aim: To analyse and compare the effect of two products of spent phone batteries on bacteria (Pseudomonas sp.) and fungi (Mucor sp.) in marine, brackish and freshwater using standard toxicological bioassay. Study Design: The study employs experimental design, statistical analysis of the data and interpretation. Place and Duration of Study...

Aim: Hydrocarbon toxicological effect on nitrogen fixing bacterium Nitrobacter sp. is of prime importance as it affects the nitrification process which negatively and adversely affects aquatic flora. In view of the significance of this process, the toxicity of local and industrial refined diesel on a key environmental pollution bio-marker, Nitrobac...

This study assessed the microbial load (Bacteria and Fungi) of the various parts of the body of the dual purpose edible insects (Rhynchophorus phoenicis) from South South Nigeria. Live samples of the insects (Maggot) were collected from the three project locations namely: are abundantly available. Methodology employed; Samples of decaying palm grub...

This paper reports the response of pollution bio-monitors such as Pseudomonas and Bacillus species to local and industrial diesel in freshwater environments of the Niger Delta, Nigeria. The illegal local refined diesel is popularly referred to as 'Bunkery diesel' or 'Kpo-fire diesel' in Niger Delta, Nigeria. It uses simply three major step/process;...

Aim: To determine and compare the effect of used phone batteries on Nitrosomonas spp. in tri aquatic bodies Study Design: The study employs experimental design and statistical analysis of the data and interpretation. Place and Duration of Study: Freshwater and Marine samples were collected from Gokana L.G.A, while, a brackish water sample was colle...

Black soot in aerosols of Niger Delta, Nigeria especially Port Harcourt is attracting global concern. Six major sources of black soot have been identified; Burning of local “kpo-fire” crude oil for production of diesel and Kerosene 67.5%, Smoke from refinery and petro-chemical industries 20%, Gas flaring from flow station of oil companies 5%, Smoke...

Exploring the sources of black soot in Port Harcorut, associated microorganisms and health implications

Three brands of spent mobile phone batteries (lithium-ion and Li-Polymer) were used as toxicant in freshwater sample with Aspergillus nidulans. The 24h Median Lethal Concentration (LC50) was used as indices for ecotoxicological assessment. Aspergillus nidulans survive and multiply in the Samsung contaminated freshwater with median lethal concentrat...

Cumulative percentage Ultimate biodegradability of two types of Drilling fluid – water base drilling fluid (WBDF) and oil base drilling fluid (OBDF) used in the upstream sector of the Nigeria petroleum industry were investigated in brackish and marine ecosystems. The rate of ultimate biodegradability was estimated from the ratio of Biochemical Oxyg...

Air sampling was done in Rivers State health centres using the direct and indirect sedimentation method. In the indirect method 20ml of normal saline was measured in a sterile beaker and exposed to air for 24 hours at three different locations in the hospitals where patients are frequently found, while the direct sedimentation method involve the di...

This research reports the incidence of pathogenic microbes associated with black soot in indoor aerosols of Classrooms in Port Harcourt Nigeria. Six major sources of black soot have been identified; Burning of local "kpo-fire" crude oil for production of diesel and Kerosene, Smoke from refinery and petrochemical industries, Gas flaring from flow st...

This study reports the effect of waste water on biodegradation of drilling fluid contamination in brackish water environment. The experimental set ups include; Control 1(Brackish water with Water base drilling fluid) (BW+WB), Control 2 (Brackish water with Oil base drilling fluid) (BW+OB), Brackish water with Water base drilling fluid with Waste wa...

This study was designed to evaluate the concentration of mobile phone batteries (Nokia and blackberry) and the duration of exposure that could result to potential effect on the microorganism Nitrobacter sp. in triaquatic ecosystem. Winogradsky medium was used to isolate the bacterial specie. Standard toxicity procedure were applied using spent mobi...

Nitrification process involves Nitrobacter species and their growth and activities in the microenvironment when impacted negatively would consequently adversely affect soil fertility. In view of the significance of this process, the toxicity of local refined kerosene (LRK) and industrial refined kerosene (IRK) on a key environmental pollution monit...

Microbiological evaluation of the key body parts of Niger Delta edible shell seafoods, Blood clam (Tegillarca granosa) and Steamer clam (Mya arenaria) sampled from Andoni River, Rivers State were investigated. The seafoods (blood clam and steamer clam) were collected, processed and analysed using standard microbiological method to determine the par...

Evaluation of bioremediation potential of two fungi species: Paecilomyces variotii and Mucor racemosus were carried out on soil sample collected from crude oil spill site in Gio Tai Ogoni land. Soil samples were inoculated and pure culture of Mucor racemosus and Paccilomyces variotii were obtained from the soil, the soil samples were also analyzed...

Bioremediation of crude oil contaminated Marshland muddy soil by bioaugmentation approach using two fungal species Candida tropicalis and Penicillium chrysogenum were evaluated. Penicillium chrysogenum and Candida tropicalis were used to augment the indigenous microorganisms present in the muddy soil to speed up the degradation rate for a period of...

Ultimate biodegradability of Industrial detergent; Teepol and Gamazyme used in the upstream sector of the Nigeria petroleum industry were investigated in fresh, brackish and marine water systems. The methodology of ultimate biodegradability estimated from the ratio of Biochemical Oxygen Demand to Chemical Oxygen Demand was used to determine biodegr...

Biodegradation of drilling fluid (water based and oil based drilling fuild) used in the upstream sector of the Nigeria petroleum industry was investigated in marine water environment. Drilling fluid were obtainedfrom Izombe well drilling site Owerri and marine water sample from Bonny River, Nigeria. The methodology of ultimate biodegradability esti...

Ecotoxicology of Oil Spill Dispersants – OSD/LT and OSD/Seacare employed in the upstream sector of the Nigeria petroleum industry were investigated in freshwater systems. Methodology for ecotoxicological assessment of the oil spill dispersants were carried out using the static with renewal option for acute toxicity at concentrations 0, 10, 100, 100...

An assessment of the various parts of shell sea food periwinkle (Tympanotonusfuscatus), oyster (Crassostreavirginica) and veined rapa whelk (Rapanavenosa) crude oil polluted site in Niger Delta communities, Nigeria. The result showed that these shell sea foods contain unacceptable levels of bacteria, it also shows that the shell of the oyster has t...

ABSTRACT: Ecotoxicology of Oil Spill Dispersants – OSD/LT and OSD/Seacare employed in the upstream sector of the Nigeria petroleum industry were investigated in freshwater systems. Methodology for ecotoxicological assessment of the Oil Spill Dispersants were carried out using the static with renewal option for acute toxicity at concentrations 0, 10...

Assessment of bioaugmentation efficiency of two fungal species Penicillium chrysogenum and

This research was designed to evaluate the spent mobile phone batteries (Samsung and Tecno) concentration and the duration of exposure that could cause potential toxicity effect on the organism Nitrobacter sp. Winogradsky medium were used for the isolation of bacteria test species. Standard toxicity procedures were applied using mobile phone batter...

The ecotoxicological evaluation of degreaser: Rigwash KLYNE 025A and Aquabreak PX and drilling fluids: Addax-WBF (water base) and Addax-OBF (oil base) to higher organism-fresh water fish Tilapia guineensis and microorganism Nitrobacter sp. were examined. The static with renewal option for acute toxicity assessment at concentrations 0, 10, 100, 1000...

Toxicity is a measure of the degree to which something is toxic; it deals with the effect of chemical substances on organisms. The problem of contamination of aquatic environment with various brands of detergents by individuals and industries has since been in practice, as such the role of microbes in food chain and as agents of degradation of subs...

Bioremediation of petroleum hydrocarbon using environmentally friendly petroleum hydro- carbon impacted media option has ever since its discovery continued to elicit research interest in environmental management and pollution control. The research aimed at identifying the comparatively suitable biostimulating agent that is environmental friendly in...

The biodegradability of two oil dispersants (OSD/Sea care and OSD/LT) were tested in brackish water ecosystem. This study aimed at evaluating the more biodegradable oil spill disper-sant frequently used in oil spill remediation in Niger Delta, Nigeria. The study lasted for 20 days and sampling was done every 5 day period (0, 5, 10, 15 and 20 days)....

The effects of industrial degreasers (Rigwash and Aquabreak) on nitrite utilization and percent log survival and log mortality of Nitrobacter were investigated. Nitrite utilization decreased with increase in concentration and exposure period of the toxicants. A 10% decrease in the logarithmic rate of growth of Nitrobacter after 72 hours of exposure...

The comparative toxicity of drilling fluids; Addax-WBF (water base) and Addax-OBF (oil base) to marine water shrimp (Mysidoposis bahia) and brackish water shrimp (Palaemonetes africanus) were examined, The static with renewal option for acute toxicity assessment at concentrations 0, 10, 100, 1000, 10000 and 100000ppm was employed. Mortality of the...

Ultimate biodegradability of Trichloroethylene used as degreaser (Rigwash and Aquabreak) was investigated in the laboratory using marine, brackish and fresh water systems. Total heterotrophic bacteria count decreases from day 1 to day 20 with the Rigwash contaminated marine sample having the highest count (9.6x10 6 , 9.3x10 5 , 6.8x10 6 , 3.0x10 5...