NDLI: Environmental persistence of chlorine from prawn farm discharge monitored by measuring the light reactions of photosynthesis of phytoplankton

Content Provider	Springer Nature Link
Author	Saetae, Panthida Bunthawin, Sakshin Ritchie, Raymond J.
Copyright Year	2013
Abstract	Chlorine (reactive chlorine: Cl2+OCl−) is used as a disinfectant on prawn farms but the environmental effects of discharged chlorine is of environmental concern. Toxicity of chlorine on prawn farm phytoplankton populations was monitored using the pulse amplitude fluorometer technique to measure phytoplankton photosynthesis. The dominant phytoplankton species found in the ponds of a prawn farm in Pang-Nga Province (Thailand) were Chlorella sp. (>95 %), with some Tetraselmis and Chaetoceros. Cells were suspended in clean sea water with (chlorine) of 15, 30, 45, 60, 75 and 90 ppm, respectively, in short-term experiments for 10 min (ST) and for long-term (24 h) exposure. Photosynthesis of Chlorella, Tetraselmis and Chaetoceros in clean sea water was inhibited by 50 % at (chlorine) of 4.68 ± 0.6, 7.26 ± 1.14 and 7.81 ± 0.78 ppm (mean ± SEM), respectively, in ST experiments. The chlorine consuming reactions with the large amounts of dissolved organic matter and ammonia in prawn farm pond water decreases toxicity but would form organochlorines and chloramine. Thiosulphate, often used to neutralise chlorine, was found to be of very limited toxicity to Chlorella in both short-term 1-h and 24-h experiments (up to ≈500 mmol m−3, 124 ppm). Environmental effects of Chlorine in discharges from ponds are short term. Chlorine quickly disappears in the environment, particularly during daylight and so only has effects close to effluent points. Standard practice was to discharge on a falling tide in daylight. The long effluent channel (1 km) also ensured that very little reactive chlorine reached the estuary.
Starting Page	321
Ending Page	338
Page Count	18
File Format	PDF
ISSN	09676120
Journal	Aquaculture International
Volume Number	22
Issue Number	2
e-ISSN	1573143X
Language	English
Publisher	Springer International Publishing
Publisher Date	2013-04-17
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Gross photosynthesis ETR Light curves Pond phytoplankton PAM fluorometry Chlorine toxicity Iodine toxicity Aquaculture Environmental effects Freshwater & Marine Ecology Zoology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science Agronomy and Crop Science

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Alterations in delayed and direct phytoplankton fluorescence in response to the diurnal light cycle

Detection and Classification of Phytoplankton Deposits Along an Estuarine Gradient

Effects of pesticides on photosynthesis of marine phytoplankton

“Green water” microalgae: the leading sector in world aquaculture

A survey on the environmental impact of pond aquaculture in Hungary

Micro-phytoplankton distribution and biomass in and around a channel-based fish farm: implications for sustainable aquaculture

Effect of temperature and light on the photosynthesis as measured by chlorophyll fluorescence of cultured Eucheuma denticulatum and Kappaphycus sp. (Sumba strain) from Indonesia

Comparison by PAM fluorometry of photosynthetic activity of nine marine phytoplankton grown under identical conditions.

Sustained primary production with changing phytoplankton assemblages in a semiarid wetland

Environmental persistence of chlorine from prawn farm discharge monitored by measuring the light reactions of photosynthesis of phytoplankton

Similar Documents

Alterations in delayed and direct phytoplankton fluorescence in response to the diurnal light cycle

Detection and Classification of Phytoplankton Deposits Along an Estuarine Gradient

Effects of pesticides on photosynthesis of marine phytoplankton

“Green water” microalgae: the leading sector in world aquaculture

A survey on the environmental impact of pond aquaculture in Hungary

Micro-phytoplankton distribution and biomass in and around a channel-based fish farm: implications for sustainable aquaculture

Effect of temperature and light on the photosynthesis as measured by chlorophyll fluorescence of cultured Eucheuma denticulatum and Kappaphycus sp. (Sumba strain) from Indonesia

Comparison by PAM fluorometry of photosynthetic activity of nine marine phytoplankton grown under identical conditions.

Sustained primary production with changing phytoplankton assemblages in a semiarid wetland

Environmental persistence of chlorine from prawn farm discharge monitored by measuring the light reactions of photosynthesis of phytoplankton