Journal
SEPARATION AND PURIFICATION TECHNOLOGY
Volume 285, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.seppur.2021.120401
Keywords
Covalently bonded coagulants; Algae harvesting; Aluminum residual; Floc size; Coagulation mechanism
Categories
Funding
- National Natural Science Foundation of China [51878001, 31900008]
- State Key Laboratory of Urban Water Resource and Environment (Harbin Institute of Technology) [ES201917]
- Natural Science Foundation of Science and Technology Department of Anhui Province [2008085QE242]
- Chinese College Students Innovation and Entrepreneurship Training Project of Anhui Province [202010360046, S202010360228]
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A novel covalently bonded composite coagulant CAFM was synthesized through UV initiation, which showed high efficiency in removing algae and turbidity from water. The use of CAFM resulted in minimal residual concentrations and the formation of compact algae flocs, highlighting its importance in drinking water treatment.
A novel covalently bonded composite coagulant CAFM was synthesized by using inorganic PAFC and organic CPAM through UV initiation. The algae and turbidity removal efficiency were investigated by using CAFM in algae-laden water coagulation process. The Al/Fe residual and algae flocs size were also examined. Results showed that 96% chlorophyll a and 87% turbidity were removed by using CAFM at dosage of 40 mg/L. The removal efficiency was larger than that by using PAFC or CPAM at their optimal dosage. The minimum Al re-sidual of 12.47 mu g/L, Fe residual of 9.64 mu g/L together with the most compact algae flocs were achieved by using CAFM0.6, which was great favorable and essential for drinking water treatment. Finally, the charge neutralization of PAFC and bridging of CPAM synergetic contributed to algae harvesting.
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