In response to the threat of frequent algal blooms to drinking water safety,ozone oxidation technology was used to treat water samples containing different algae,and the algae removal effect and mechanism were investigated.The results showed that the ozone concentrations required to achieve a 90% algae removal rate in autotrophic algae water and real water were 1.44 mg/L and 2.40 mg/L,respectively,and the difference was attributed to the presence of more oxygen-consuming impurities in the actual water.Ozone concentration has a significant impact on the structural integrity of algal cells.Excessive ozone dosage may cause algal cell rupture and release algal toxins.Therefore,it is necessary to optimize the ozone dosage based on water quality characteristics and treatment objectives.Ozone oxidation can achieve the removal of algae cells by reducing their surface electrostatic repulsion and disrupting their biological structure.The study provides important parameter references for emergency treatment of algal blooms.
Le MoalM, Gascuel-OdouxC, MénesguenA, et al. Eutrophication:A new wine in an old bottle[J]. Science of the Total Environment, 2019, 651:1-11.
[2]
PaerlH W, FultonR S, MoisanderP H, et al. Harmful freshwater algal blooms,with an emphasis on cyanobacteria[J]. The Scientific World Journal, 2001, 1(2):76-113.
[3]
缪恒锋. 太湖富营养化水体中典型污染物的臭氧氧化研究[D]. 无锡: 江南大学, 2008.
[4]
PowellA, ScoldingJ W. Direct application of ozone in aquaculture systems[J]. Reviews in Aquaculture, 2018, 10(2):424-438.
[5]
AbdulA H, ShakrS N M, AkbarN A, et al. The removal efficiency of iron and manganese from pre-ozonated groundwater using limestone filter[J]. Water Quality Research Journal, 2020, 55(2):167-183.
XieP, MaJ, FangJ, et al. Comparison of permanganate preoxidation and preozonation on algae containing water:Cell integrity,characteristics,and chlorinated disinfection byproduct formation[J]. Environmental Science & Technology, 2013, 47(24):14051-14061.
[8]
LahtiK, RapalaJ, KivimäkiA L, et al. Occurrence of microcystins in raw water sources and treated drinking water of Finnish waterworks[J]. Water Science and Technology, 2001, 43(12):225-228.
JiangY, GoodwillJ E, TobiasonJ E, et al. Comparison of ferrate and ozone pre-oxidation on disinfection byproduct formation from chlorination and chloramination[J]. Water Research, 2019, 156:110-124.
NguyenM, WesterhoffP, BakerL, et al. Characteristics and reactivity of algae-produced dissolved organic carbon[J]. Journal of Environmental Engineering, 2005, 131(11):1574-1582.
[18]
CoralL A, ZamyadiA, BarbeauB, et al. Oxidation of Microcystis aeruginosa and Anabaena flos-aquae by ozone:Impacts on cell integrity and chlorination by-product formation[J]. Water Research, 2013, 47(9):2983-2994.
MidekessaG, GodakumaraK, OrdJ, et al. Zeta potential of extracellular vesicles:Toward understanding the attributes that determine colloidal stability[J]. ACS Omega, 2020, 5(27):16701-16710.
[21]
HendersonR, ParsonsS A, JeffersonB. The impact of algal properties and pre-oxidation on solid-liquid separation of algae[J]. Water Research, 2008, 42(8/9):1827-1845.
[22]
NguyenT L, LeeD J, ChangJ S, et al. Effects of ozone and peroxone on algal separation via dispersed air flotation[J]. Colloids and Surfaces B:Biointerfaces, 2013, 105:246-250.
[23]
HaoR, RenH, LiJ, et al. Use of three-dimensional excitation and emission matrix fluorescence spectroscopy for predicting the disinfection by-product formation potential of reclaimed water[J]. Water Research, 2012, 46(17):5765-5776.