Controlling harmful algae blooms using aluminum-modified clay

Marine Pollution Bulletin
Yang LiuLixia Qiu

Abstract

The performances of aluminum chloride modified clay (AC-MC), aluminum sulfate modified clay (AS-MC) and polyaluminum chloride modified clay (PAC-MC) in the removal of Aureococcus anophagefferens were compared, and the potential mechanisms were analyzed according to the dispersion medium, suspension pH and clay surface charges. The results showed that AC-MC and AS-MC had better efficiencies in removing A.anophagefferens than PAC-MC. The removal mechanisms of the three modified clays varied. At optimal coagulation conditions, the hydrolysates of AC and AS were mainly monomers, and they transformed into Al(OH)3(am) upon their addition to algae culture, with the primary mechanism being sweep flocculation. The PAC mainly hydrolyzed to the polyaluminum compounds, which remained stable when added to the algae culture, and the flocculation mainly occurred through polyaluminum compounds. The suspension pH significantly influenced the aluminum hydrolysate and affected the flocculation between the modified clay and algae cells.

References

Jul 5, 2001·Marine Pollution Bulletin·T ProbynR Nuzzi
Apr 28, 2004·Marine Pollution Bulletin·Xiao-Xia SunEun-Ki Kim
Apr 28, 2004·Marine Pollution Bulletin·Xiao-Xia SunEun-Ki Kim
Jul 1, 1988·Environmental Science & Technology·S K Dentel
Mar 31, 2012·Annual Review of Marine Science·Donald M AndersonGustaaf M Hallegraeff
Jul 21, 2014·Marine Pollution Bulletin·Maryam R Al ShehhiHosni Ghedira

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Citations

Jun 28, 2020·Environmental Science and Pollution Research International·Yiwei HuBinliang Wang
Jan 8, 2021·Environmental Science and Pollution Research International·Michael Engda AsgodomJinming Kong
Jul 3, 2021·Journal of Environmental Sciences (China)·Xueyi DongShitao Yu
Sep 28, 2017·Environmental Science & Technology·Wei XiongRuikang Tang

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