@Article{MirandaNPMPSSHLM:2017:EfCoCo,
author = "Miranda, Miranda and Noyma, Nat{\'a}lia and Pacheco, Felipe
Siqueira and Magalh{\~a}es, Leonardo de and Pinto, Ernani and
Santos, Suzan and Soares, Maria Fernanda A. and Huszar, Vera L.
and L{\"u}rling, Miquel and Marinho, Marcelo M.",
affiliation = "{Universidade Federal de Juiz de Fora (UFJF)} and {Universidade
Federal do Rio de Janeiro (UFRJ)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Universidade Federal do Rio de
Janeiro (UFRJ)} and {Universidade de S{\~a}o Paulo (USP)} and
{Universidade Federal do Rio de Janeiro (UFRJ)} and {Universidade
Federal de Juiz de Fora (UFJF)} and {Universidade Federal do Rio
de Janeiro (UFRJ)} and {Wageningen University} and {Universidade
Federal do Rio de Janeiro (UFRJ)}",
title = "The efficiency of combined coagulant and ballast to remove harmful
cyanobacterial blooms in a tropical shallow system",
journal = "Harmful Algae",
year = "2017",
volume = "65",
pages = "27--39",
keywords = "Eutrophication control Cyanobacteria mitigation Microcystis
Cylindrospermopsis Chitosan.",
abstract = "We tested the hypothesis that a combination of coagulant and
ballast could be efficient for removal of positively buoyant
harmful cyanobacteria in shallow tropical waterbodies, and will
not promote the release of cyanotoxins. This laboratory study
examined the efficacy of coagulants [polyaluminium chloride (PAC)
and chitosan (made of shrimp shells)] alone, and combined with
ballast (lanthanum modified bentonite, red soil or gravel) to
remove the natural populations of cyanobacteria collected from a
shallow eutrophic urban reservoir with alternating blooms of
Cylindrospermopsis and Microcystis. PAC combined with ballast was
effective in settling blooms dominated by Microcystis or
Cylindrospermopsis. Contrary to our expectation, chitosan combined
with ballast was only effective in settling
Cylindrospermopsis-dominated blooms at low pH, whereas at pH 8 no
effective flocculation and settling could be evoked. Chitosan also
had a detrimental effect on Cylindrospermopsis causing the release
of saxitoxins. In contrast, no detrimental effect on Microcystis
was observed and all coagulant-ballast treatments were effective
in not only settling the Microcystis dominated bloom, but also
lowering dissolved microcystin concentrations. Our data show that
the best procedure for biomass reduction also depends on the
dominant species.",
doi = "10.1016/j.hal.2017.04.007",
url = "http://dx.doi.org/10.1016/j.hal.2017.04.007",
issn = "1568-9883",
language = "en",
urlaccessdate = "04 maio 2024"
}