Work

Experimental Removal of Microcystis aeruginosa by Magnetic Clay Minerals Synergized with CPAM and Adsorption Mechanism Study

Year: 2025

Type: article

Abstract: Cyanobacterial blooms, a harmful consequence of water eutrophication, necessitate efficient algal removal strategies. This study synthesized magnetic bentonite and kaolinite via co-precipitation by loading nano-Fe₃O₄ onto clay minerals. The materials were characterized using SEM, FTIR, and XRD: single-factor experiments and response surface methodology (Box-Behnken design) optimized parameters for algae removal. Optimal conditions included a 1:1 ratio of magnetic clay minerals to cationic polyacrylamide (CPAM), pH 2, 10 min stirring (150 rpm), and dosages of 0.8 g/L (magnetic bentonite) and 0.4 g/L (magnetic kaolinite). Further refinement via response surface analysis yielded 92.13% algal cell removal with magnetic bentonite at 0.206 g/L, 12.9 min stirring, and 170.6 rpm. Mechanistic studies (Zeta potential, SEM, particle size analysis) indicated that electrostatic adsorption between algae and magnetic clays formed flocs, subsequently captured by CPAM networks. This rapid, efficient process highlights the potential of magnetic clay-CPAM composites for treating eutrophic, algae-laden waters. The findings offer a technical reference for sustainable water remediation.

Source: Polish Journal of Environmental Studies

DOI: 10.15244/pjoes/205257

Authors: Tingyu Fan, Xuyang Zhou, Pingjuan Wu, Akang Lu

Institution: Anhui University of Science and Technology

Language: English

Topic: Coagulation and Flocculation Studies

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDG: Clean water and sanitation

Open Access status: diamond

Funder: National Key Research and Development Program of China