alexa Vertical Existence of Coprostanol in a Sediment Core from Semarang Coastal Waters, Central Java, Indonesia | OMICS International | Abstract
ISSN: 2473-3350

Journal of Coastal Zone Management
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Research Article

Vertical Existence of Coprostanol in a Sediment Core from Semarang Coastal Waters, Central Java, Indonesia

Abstract

Coprostanol has been proposed as an indicator of domestic (sewage) pollution by researchers because
constraint of using coliform bacteria as the indicators of domestic pollution in the environment with
high environmental stress, such as urban coastal waters. Increasing the volume of industrial wastes,
toxic and heated, the changing of water salinity from low (freshwater) to high (sea water), and
decreasing of dissolved oxygen (DO) in the waters, are the constrain factors of bacteria growth. How
ever, all the researches have been done in the temperate (high latitude) regions. Information existence
of coprostanol in tropical region, especially in Indonesia is still very poor. To understand the existence
of coprostanol in the sediments, one core sediment sample (60 cm) was collected from Semarang
coastal water adjacent to Banjir Kanal Timur which is the main drainage system of the East Semarang
municipal district in Central Java by using a small gravity corer in July 2001. The core sediment
sample was divided into 12 sections (5 cm each) for analyzing the concentration of coprostanol, grain
size, and TOC. The result shows that coprostanol could be detected in all sample sections (vary from
1.06 to 2.94 μg/g). Coprostanol has significant positive correlation with TOC, but not significant with
grain size. Coprostanol has very significant negative correlation with the depth of core. Based on the
potency of sedimentation rate analysis on Banjir Kanal Timur Semarang coastal waters (0.35
cm/month), the 60 cm core sediment was predicted as a result of 14 –16 year sedimentation. All of these
facts show that coprostanol has an excellent persistence in the sediment of tropical environment, and
reflect that coprostanol has a potency as an alternative indicator of domestic waste pollution in urban
tropical coastal waters.

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