Abstract:
:Phytoplankton entrained into cooling water systems of coastal power stations are subjected to acute chemical stress due to biocides (chlorine) used for biofouling control. They are subsequently released into the environment, where they may survive/recover or succumb. Experiments were conducted to evaluate the susceptibility of a centric (Chaetoceros lorenzianus) and pennate (Navicula sp.) diatom to in-plant administered concentrations of chlorine (0.2-0.5mg/L, TRO). Viability of cells exposed to chlorine was assessed by SYTOX® Green fluorimetry and was compared with other conventional end points like total cell counts, chlorophyll a content and cellular autofluorescence. Results showed a concentration-dependant reduction in viability, chlorophyll a and autofluorescence. C. lorenzianus cells were more susceptible to chlorine compared to Navicula sp. SYTOX® Green staining appears to be a sensitive method to assess chlorine-induced damages. The data show that in-use levels of chlorination can potentially impact entrained organisms; however, they can recover when returned to coastal waters.
journal_name
Mar Pollut Bulljournal_title
Marine pollution bulletinauthors
Venkatnarayanan S,Sriyutha Murthy P,Nancharaiah YV,Kirubagaran R,Venugopalan VPdoi
10.1016/j.marpolbul.2016.12.059subject
Has Abstractpub_date
2017-11-30 00:00:00pages
819-826issue
2eissn
0025-326Xissn
1879-3363pii
S0025-326X(16)31063-3journal_volume
124pub_type
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