Tolerance of Escherichia Coli in dredged marine soils under artificial solar exposures

Anuar, Nurasiah Mira and Chan, Chee Ming (2016) Tolerance of Escherichia Coli in dredged marine soils under artificial solar exposures. ARPN Journal of Engineering and Applied Sciences, 11 (8). ISSN 18196608

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Abstract

Dredging work involves a range of marine soils, varying from coarse to fine, clean to contaminated. Dredging involves excavation and disposal and both processes could affect the marine environment through release of possible contaminants. Due to the potential for transmission of diseases, this hazard becomes a major concern as the Dredged Marine Soils (DMS) have its own values for reuse or recycle purposes. To prevent the needless cost and time involved in assessing several of pathogen bacteria, the indicator bacteria, Escherichia coli (E. coli) been used to assess the biological contamination in marine environment. The effect of natural factors, solar exposure and depth of soil were investigated. The main goal is to understand bacteria survival ability, as an approach to deal with the hazards. Under the condition without the existence of predatory microorganisms, experiments are performed at nine hours of solar exposure. In laboratory solar exposure experiments, the data dealing with the survival of bacteria showed that the cell reduction was more pronounced when compared to the absence of solar threat. After an extended period of solar exposures, as high as 90 - 99 % of E. coli have being removed.

Item Type:Article
Uncontrolled Keywords:Escherichia coli; dredged marine soils; solar exposures; depth of soils
Subjects:T Technology > TA Engineering (General). Civil engineering (General) > TA703-711 Engineering geology. Rock mechanics. Soil mechanics.
Divisions:Faculty of Engineering Technology > Department of Civil Engineering Technology
ID Code:8504
Deposited By:Mr. Mohammad Shaifulrip Ithnin
Deposited On:05 Jun 2017 08:48
Last Modified:05 Jun 2017 08:48

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