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https://ptsldigital.ukm.my/jspui/handle/123456789/499743Full metadata record
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | Mohammad Shuhaimi Othman, Prof. Madya Dr. | |
| dc.contributor.author | Fawaz Mohammed Ahmad Al-Badaii (P62704) | |
| dc.date.accessioned | 2023-10-13T09:34:16Z | - |
| dc.date.available | 2023-10-13T09:34:16Z | - |
| dc.date.issued | 2016-05-13 | |
| dc.identifier.other | ukmvital:82180 | |
| dc.identifier.uri | https://ptsldigital.ukm.my/jspui/handle/123456789/499743 | - |
| dc.description | This study was carried out to determine the water pollution of the Semenyih River, Selangor, Malaysia based on the water quality parameters and heavy metals, and to classify the river according to NWQS and WQI for Malaysia. The study also aimed to investigate the prevalence of antibiotic resistant E.coli and total coliform bacteria at each station in the river and to determine the influence of water pollution on the distribution of antibiotic resistant E.coli and total coliform bacteria as well as to evaluate the potential risks of contamination by antibiotic resistant coliform bacteria. The water samples were collected during the years 2012 and 2013 from 8 sampling stations along the Semenyih River. Eighteen water quality variables and eight dissolved heavy metals have been analysed. The results showed that temperature, conductivity, TDS, NO2, SO4and TH were classified as class I, while DO, pH and BOD5 were placed under class II based on NWQS. Thus, these parameters were in the normal range. Moreover, COD, NH3-N, TSS, turbidity and NO3 were categorized as class III; hence, these variables reached the threshold limit. Besides, PO4 was classified as class IV, whereas O&G, E.coli and TC were categorized as class V, therefore, these variables were exceeded the allowable threshold limits of NWQS. The mean values of dissolved heavy metals were within the normal range determined by NWQS and observed in the following sequences: Fe>Mn>Zn>Cu>Cr>Pb> Ni> Cd. Based on WQI classification, the river is classified as clean at stations 1 (Class I) and 2 (Class II), slightly polluted at stations 3 (Class II), 4, 5, 6 and 7(Class III) and polluted at stations 8(class III). Overall, the river was classified as Class III (slightly polluted). Therefore, the river is suitable for irrigation but required extensive treatment to be used for the domestic purposes. Cluster analysis (CA) classified 8 sampling stations into three clusters based on the similarity of water quality characteristics, including relatively less polluted (Cluster 1), medium polluted (Cluster 2) and highly polluted (Cluster 3) stations. Principal component analysis (PCA) of data sets generated four factors with total variance of 96.43% and indicated that the variables responsible for deterioration of water quality are mainly attributed to anthropogenic activities for factor 1 and lithologic and anthropogenic sources for factor 2, 3 and 4. Additionally, from the 640 E.coli isolates, 81.1% exhibited resistance to ampicillin, 96.4% to penicillin, 31.9% to gentamicin, 48% to tetracycline, 9.7% to ciprofloxacin and 25.6% were resistant to chloramphenicol. In contrast, the 640 isolates of total coliform were 80.5% resistant to ampicillin, 96.4% to penicillin, 30.8% to gentamicin, 47.8% to tetracycline, 7.7% to ciprofloxacin and 22% exhibited resistance to chloramphenicol. The E.coli and total coliform bacteria isolates exhibited high resistance to ampicillin and penicillin, moderate resistance to gentamicin and tetracycline and low resistance to ciprofloxacin and chloramphenicol. Significant differences in antibiotic resistance were found among sampling stations (ANOVA, p<0.05). In addition, the multiple antibiotic resistance index showed low risks contamination at all stations except stations 6 and 8, which indicated high risks contamination due to the agricultural runoff, domestic wastewater from Semenyih and Bangi towns and the discharges of livestock farms. These results suggest that the pollutants responsible for the water quality declined could be related to the prevalence of antibiotic resistant E.coli and total coliform bacteria due to their found together in different pollution sources.,Certification of Master's/Doctoral Thesis" is not available | |
| dc.language.iso | eng | |
| dc.publisher | UKM, Bangi | |
| dc.relation | Faculty of Science and Technology / Fakulti Sains dan Teknologi | |
| dc.rights | UKM | |
| dc.subject | Water pollution | |
| dc.subject | Antibiotic resistant | |
| dc.subject | Coliform bacteria | |
| dc.subject | Semenyih River | |
| dc.subject | Dissertations, Academic -- Malaysia | |
| dc.title | Water pollution and its impact on the prevalence of antibiotic resistant coliform bacteria: a study of the Semenyih River | |
| dc.type | Theses | |
| dc.format.pages | 350 | |
| dc.identifier.barcode | 002295(2016) | |
| Appears in Collections: | Faculty of Science and Technology / Fakulti Sains dan Teknologi | |
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| File | Description | Size | Format | |
|---|---|---|---|---|
| ukmvital_82180+SOURCE1+SOURCE1.0.PDF Restricted Access | 182.88 kB | Adobe PDF |  View/Open |
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