Study on the process and mechanism of ferrate-coordinated ATP/MCPA coagulation-oxidation RO concentrate

Dissolved organic matters (DOM) from RO concentrates with high salt has been causing a serious threat to industrial water as pollutants in reclaimed-water recycling, and it is difficult to effectively remove them from RO concentrates. In this study, our major objective was to study the interference mechanism between the multi-coordination purifying agents (MCPA) and DOM from RO concentrates with high salt. Firstly, MCPA with ATP as vector (ATP-MCPA) with strong applicability, multifunction and high-performance was designed and prepared in order to observe the microstructure variation in the synthetic process and optimize the MCPA species to achieve the best performance; Secondly, the effect of the MCPA cooperating with ferrate(VI) on the removal of DOM from RO concentrates with high salt was investigated to explore the common features and the basic law of micro-dynamics on the removal of DOM in the process of coagulation, absorption and oxidation, in order to study the synergistic effect and the principle of coagulation increase between ATP and doped ions, as well as their structure-activity relationships, adsorption and oxidation coupling and interference mechanism between ATP-MCPA, ferrate(VI) and DOM from RO concentrates. Finally, the mechanism in the treatment of DOM from RO concentrates with high salt was been explored in order to perfect and develop coagulation and oxidation reaction mechanism. This research contributes to the performance improvement of the coagulation-flocculation and oxidation process for removal of DOM from RO concentrates with high salt, and therefore, which is provided theoretical basis and technical support in the coagulation and oxidation reaction mechanism, new flocculants synthesis and practical application.