A passive apparatus for controlled-flux delivery of biocides: hydrogen peroxide as an example

Biofouling
S M OlsenS Kiil

Abstract

A new test method has been developed to estimate the required release rate of hydrogen peroxide (H2O2) to prevent marine biofouling. The technique exploits a well-defined concentration gradient of biocide across a cellulose acetate membrane. A controlled flux of H2O2, an environmentally friendly biocide, was obtained. Larvae of the barnacle, Balanus improvisus, were subjected to known release rates of H2O2 from a surface, under laboratory conditions. It was found that the distribution of settled larvae was not significantly different from the controls when H2O2 fluxes of 5-8 microg cm(-2) day(-1) were applied. However, release rates of 40 microg cm(-2) day(-1) significantly displaced the distribution of settled larvae towards the area of the chamber farthest away from the membrane. Membrane tests in seawater (Jyllinge Harbour, Denmark) for over 16 weeks showed that release rates of H2O2 of approximately 2800 microg cm(-2) day(-1) deterred biofouling efficiently. A H2O2 release rate of about 224 microg cm(-2) day(-1) resulted in some slime formation, but it was less than that on the H2O2-free control. It appears that to obtain efficient resistance to biofouling in natural seawater requires much higher membrane release rates of H...Continue Reading

References

Jun 28, 2001·Enzyme and Microbial Technology·B J. SavaryJ V. O'Connor
Jan 18, 2003·Infectious Diseases in Obstetrics and Gynecology·U B HoymeA Eul
Jun 9, 2004·Chemosphere·Eduardo Cyrino de Oliveira-FilhoFrancisco José Roma Paumgartten
Mar 23, 2006·Biofouling·Diego Meseguer YebraKim Dam-Johansen
Dec 20, 2007·Biofouling·Anthony S Clare, Jens T Høeg
Jul 1, 2008·Biofouling·Jian-Wen QiuPei-Yuan Qian
Dec 1, 1995·Environmental Science & Technology·C H Liao, M D Gurol

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