Effective phosphate uptake and inhibition on M. aeruginosa by Friedel-based adsorbent

Friedel-based adsorbent was successfully prepared by the simple hydration reaction between cement and Cl-bearing salt solution. X-ray diffraction and FTIR spectroscopy were used to characterize the synthesized products and the adsorption behavior of products was examined by adsorption isotherm and kinetics. Furthermore, the inhibitive effect of Friedel-based adsorbents on Microcystis aeruginosa (M. aeruginosa) was also investigated. The results indicated that the adsorption isotherm could be fit well with Langmuir equations and the adsorption process was followed first-order kinetics. Both the experimental and modeled data indicated that Friedel-based adsorbent had a strong adsorption capacity of phosphate and an effective inhibition on M. aeruginosa. A maximum inhibition rate of 99.32% was achieved at the tenth day with an adsorbent dose of 4 g/L.