Research
| Title： | Properties of CaO2 for H2O2 release and phosphate removal and its feasibility in controlling Microcystis blooms |
|---|---|
| First author： | Hu, Yiwei; Shen, Liang; Ren, Xuanqi; Bi, Yonghong; Hu, Baowei; Wang, Binliang |
| Journal： | ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH |
| Years： | 2020 |
| DOI： | 10.1007/s11356-020-09738-5 |
| Abstract： | Calcium peroxide (CP) has been widely applied in environmental remediation, but few studies have reported its application in controllingMicrocystisblooms. To recognize its feasibility for mitigatingMicrocystisblooms, the properties of CP in terms of hydrogen peroxide (HP) release and phosphate removal were investigated at different CP doses, temperatures, and initial pH values. HP release kinetics followed the Higuchi model. Batch experiments conducted in this study suggested that the HP yield and release rate were positively correlated with the CP dose. Increasing temperature decreased the HP yield but accelerated the HP release rate. The phosphate removal kinetics were well simulated by the pseudo-second-order model. The batch experiments suggested that an increased CP dose enhanced the phosphate removal capacity, but it did not affect the phosphate removal rate. Moreover, increased temperature accelerated both phosphate removal capacity and rate. However, the initial pH of low-buffer-capacity solutions did not notably affect HP release and phosphate removal. According to laboratory experiments, HP released from CP could impair photosynthetic activity, resulting inMicrocystismortality. Furthermore, the reduced phosphate concentration in the solutions suggested that CP could facilitate the control of eutrophication, which directly reduced bloom formation. Hence, our results confirmed CP as a promising algicide forMicrocystisbloom control, and it is worthwhile to develop novel methods for bloom mitigation based on CP. |
