Abstract
The physicochemical, microbiological and heavy metal studies of water samples and bacteria obtained from the Dandaru River were investigated. Water samples were collected from six different sampling points along the course of the river and analysed using standard procedures. The physicochemical parameters showed that the water samples at point 5 had the highest value for all the parameters except Total Dissolved Solids. The heavy metal analysis revealed that the mean concentration of zinc, lead, chromium and iron were highest at point 5; 2.11, 0.02, 0.04 and 0.54 mg/l respectively, while that of copper and manganese concentration was highest at point 4 (0.59 and 0.41 mg/l respectively). The total heterotrophic bacteria count was between 3.6 - 64.0 ×101 cfu/ml, with point 3 having the least value (3.6×101 cfu/ml); while the coliform count using Most Probable Number (MPN) tube method ranged from 350 - ≥1600 MPN index/100 ml. The bacteria obtained belonged to the genera Bacillus, Enterobacter, Escherichia, Pseudomonas and Staphylococcus. On exposure to increasing concentration of six heavy metals, 47.62% of the total bacteria obtained were observed to be growing at 500 µg/ml for all the six metals employed in this study, while the others showed varying degree of tolerance to the metals. Key words: Heavy metals, physicochemical, microbiological, river, bacteria.
Highlights
Due to human and natural activities, contaminant enters the environment
The heavy metal composition of the water samples from the Dandaru River showed that the highest level of iron, lead, zinc and chromium was observed in the water sample from sampling point 5 with values of 0.54, 0.02, 2.11 and 0.04 mg/l, respectively
Metal composition of the water samples obtained from the six sampling points on Dandaru River
Summary
Due to human and natural activities, contaminant enters the environment. These pollutants cause serious problems and risks to the environment and man himself (Shanbehzadeh et al, 2014; Espenoza-Quinones et al, 2005). Water resources are among the most critical resources and the importance of water resources, surface water (rivers), in meeting the water need of humans, animals and industries underscores the need to protect them against contaminations (Shanbehzadeh et al, 2014). Industrial and agricultural wastes enter the water, biological and chemical contaminants including heavy metals enter.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
