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Effects and control of metal nutrients and species on Microcystis aeruginosa growth and bloom
Author(s) -
Zhou Haidong,
Chen Xiaomeng,
Liu Xiaojing,
Xuan Yumei,
Hu Tao
Publication year - 2019
Publication title -
water environment research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.356
H-Index - 73
eISSN - 1554-7531
pISSN - 1061-4303
DOI - 10.2175/106143017x15131012188303
Subject(s) - microcystis aeruginosa , bloom , nutrient , algal bloom , zinc , copper , sulfide , chemistry , trace metal , metal , environmental chemistry , microcystis , metal toxicity , inorganic chemistry , biology , cyanobacteria , ecology , phytoplankton , heavy metals , bacteria , genetics , organic chemistry
The effects and control of typical metal nutrients, copper, iron, and zinc, on the growth and bloom of Microcystis aeruginosa were investigated with a series of flask‐shaking tests. The optimal concentrations of copper, iron, and zinc for algal growth were 0.001, 3–12, and 0.05 mg/L, respectively. The order of toxicity to the alga was Cu > Zn > Fe. The effects of the species, for a trace metal at the same concentrations, on the growth of M. aeruginosa were relatively remarkable. Ionic and complexation species induced more algal growth than the carbonate and sulfide‐bound species. Changes in copper concentration and iron species were adopted to adjust and control the bloom of M. aeruginosa . Increases in copper concentrations significantly suppressed the M. aeruginosa bloom. The growth rate of M. aeruginosa slowed significantly when ionic iron was replaced with sulfide‐bound iron, and the control of bloom was remarkable. Practitioner points Using trace metal nutrient species and concentration to regulate and control algal growth and bloom may pave another way for the management of cyanobacterial bloom.