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International Journal of Environment Science and Technology
Center for Environment and Energy Research and Studies (CEERS)
ISSN: 1735-1472
EISSN: 1735-2630
Vol. 12, No. 7, 2015, pp. 2339-2348
Bioline Code: st15220
Full paper language: English
Document type: Research Article
Document available free of charge

International Journal of Environment Science and Technology, Vol. 12, No. 7, 2015, pp. 2339-2348

 en Effects of algicide on the growth of Microcystis flos-aquae and adsorption capacity to heavy metals
Guo, P. Y.; Liu, Y.; Wen, X. & Chen, S. F.

Abstract

In this paper, the effects of salicylic acid (SA) algicide carried by cross-linked chitosan on the inhibition of Microcystis flos-aquae and the removal ability of heavy metals Pb and Ni in compound polluted water were studied. The results showed that the algicide had significant inhibitory effects on Microcystis flos-aquae: when the concentrations were 550 and 700 mg L-1, the inhibition time was up to 13 days or more, and the inhibition rate was as high as 99 %. The algicide exhibited strong adsorption capacity to heavy metals Pb and Ni. The adsorption rates of the algicide at concentrations of 400 and 550 mg L-1 on Ni and Pb were 61 and 64.9 %, 71.2 and 72.5 % at 13 days, respectively. The algicide allows a slow release of SA and long-term inhibition of algae and has better adsorption capacity on heavy metals, thus providing a method for the effective control of eutrophication and combined heavy metal pollution in water.

Keywords
Algicide; Heavy metals; Adsorption capacity; Microcystis flos-aquae; Cross-linked chitosan; Salicylic acid

 
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