NDLI: Removal of cyanobacteria and cyanotoxins during lake bank filtration at Lagoa do Peri, Brazil

Content Provider	Springer Nature Link
Author	Romero, L. G. Mondardo, R. I. Sens, M. L. Grischek, T.
Copyright Year	2014
Abstract	Bank filtration is presented as a barrier for cyanobacteria and their metabolites (cyanotoxins and odor compounds). Retention of cyanobacteria is supported by column and bench studies using sandy materials. Most of the removal is in the first decimeters of infiltration, where physical and biological processes take place. Cyanotoxin removal is a very complex process including sorption and/or biodegradation. Sorption depends on the type of cyanotoxin and the sediments/aquifer composition. Biodegradation depends on the type of cyanotoxin, redox conditions, previous contact with the cyanotoxin, type and content of natural organic matter, and temperature. Pilot studies at the Lake Lagoa do Peri in Brazil demonstrated the effectiveness of bank filtration in removing phytoplankton and Cylindrospermopsis raciborskii (105–106 cells/mL) before reaching a sampling well at 12-m depth located 20 m from the lakeshore. Column experiments confirmed biomass removal predominantly in the upper 2 cm of infiltration. No saxitoxins (STXs) were found in the well water and a high retention of neo-STX and STX was determined by isotherm experiments. The sorption linear coefficient (K d 13–16 L/kg) was found to better represent the sorption processes than the Freundlich coefficient (K f 6.5–12 L/kg).
Starting Page	1133
Ending Page	1143
Page Count	11
File Format	PDF
ISSN	1618954X
Journal	Clean Technologies and Environmental Policy
Volume Number	16
Issue Number	6
e-ISSN	16189558
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-02-02
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Bank filtration Coastal lake Cyanobacteria Cyanotoxin Water treatment Sustainable Development Industrial Chemistry/Chemical Engineering Industrial and Production Engineering Environmental Engineering/Biotechnology Environmental Economics
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Environmental Engineering Economics and Econometrics Business, Management and Accounting Management, Monitoring, Policy and Law

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