Flocculation and Removal Study of Water Bloom Microcystis aeruginosa by Surface-modified Sediment
[Objective] The cetrimonium bromide,cationic surfactant and poly dimethyl diallyl ammonium chloride were directly applied to modify the sediment,which were also employed to remove M.aeruginosa.[Method] The present work focused on the influences of size,preparing temperature,aging time,pH and dosage of S-CTAB sample on the removal of M.aeruginosa.The removal mechanism of M.aeruginosa was proposed by studying the average settling velocity of S-CTAB.[Result] Removal effect of M.aeruginosa by S-CTAB was higher than that by S-DPQAC and S-PDMDAAC.When mass ratio of CTAB and sediment was 0.04 g/g,size of sediment was 200 meshes,dosage was 5 g/L,temperature was 40 ℃,the prepared S-CTAB showed the best removal effect on M.aeruginosa.Removal mechanisms of M.aeruginosa by S-CTAB were bridging and netting capture effect of the modified sediment on algae and killing effect of quaternary ammonium ion of sediment surface to algae cell.[Conclusion] The present flocculation technology shows excellent performance,which could providetheoretical basis for the removal of water bloom M.aeruginosa.
国家科技期刊平台
NSTL
万方数据
维普
