FERRIC CARBAMIDE COMPLEX-MODIFIED CLAY:A NEW MINERAL COMPOSITE FOR MULTIVARIATE CONTROL OF RED TIDES
Red tide outbreaks not only result in the accumulation of excessive microalgae cells in water bodies,but also eutrophication,which is thought to be the pollution of water bodies with superfluous nitrogen and phosphorus.With the increasing requirements for ecological environment governance,the management of harmful red tide not only requires efficient algae removal to control disasters,but also requires the purification of other pollutants in the water body and comprehensive treatment of the polluted water environment.To meet the demand for comprehensive management of harmful red tide,a modified clay method was employed in experiment to investigate the potential of ferric carbamide complex as a means of preparing functional red tide management materials.The experimental results demonstrate that the newly developed ferric carbamide complex modified clay(FMC)exhibited effective algal and phosphorus removal capabilities.Furthermore,the key preparation conditions for controlling FMC performance were identified.The findings indicate that the in-situ surface synthesis method is a more suitable approach for the synthesis of functional FMC.The FMC obtained by this method exhibits excellent stability,displaying strong algae removal ability,and environmental friendly,as well as a notable efficacy in eliminating active phosphates in water.It is an efficacious material for the treatment of multiple elements associated with red tide.The ratio of urea to iron ions(RU-Fe),the mass ratio of ferric carbamide(FC)to clay(RF-C),reaction temperature,droplet acceleration,and maturation time all affect the algae removal ability of the prepared FMC.The optimal preparation conditions were obtained by using the orthogonal experimental method.The optimal conditions FMC were:the ratio of urea to iron ions RU-Fe:1∶1.1,the mass ratio of ferric carbamide(FC)to clay RF-C:1∶1,reaction temperature:30 ℃,droplet acceleration:1 mL/min,and maturation time:1 h.FMC Under the optimal conditions,the algae removal rate reached over 90％within three hours at a dosage of 0.2 g/L,and removal of 84％of active phosphate.This study presented a novel method for the formulation of functional modified clay materials to improve comprehensive management of red tide.
red tide controlfunctional modified clayferric carbamide complexpreparation method
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