TY - JOUR
T1 - Removal of Microcystis aeruginosa by UV-activated persulfate
T2 - Performance and characteristics
AU - Wang, Zongping
AU - Chen, Yiqun
AU - Xie, Pengchao
AU - Shang, Ran
AU - Ma, Jun
PY - 2016/9/15
Y1 - 2016/9/15
N2 - Cyanobacteria blooms in source waters have become a worldwide issue for drinking water production. UV-activated persulfate (UV/PS) technology was firstly applied to remove cultivated Microcystis aeruginosa (M. aeruginosa) in bench scale. The presence of persulfate significantly enhanced both cytoclasis and algal organic matter mineralization compared with UV-C inactivation alone. Around 98.2% of algal cells were removed after UV/PS process treatment for 2 h at a dosage of PS being 1500 mg/L (approximately 6 mM). Both sulfate and hydroxyl radicals were proven to contribute to the removal of algae and the loss of cell integrity. The cultivated M. aeruginosa in death growth phase were found to be more vulnerable to UV/PS treatment than those growing in log phase, thus a significant lower dosage of PS is needed to achieve the desired removal efficiency. This study suggested a novel application of UV/PS process in the removal of algae in source waters due to the high degradation efficiency of both algal cells and their derived organic matter.
AB - Cyanobacteria blooms in source waters have become a worldwide issue for drinking water production. UV-activated persulfate (UV/PS) technology was firstly applied to remove cultivated Microcystis aeruginosa (M. aeruginosa) in bench scale. The presence of persulfate significantly enhanced both cytoclasis and algal organic matter mineralization compared with UV-C inactivation alone. Around 98.2% of algal cells were removed after UV/PS process treatment for 2 h at a dosage of PS being 1500 mg/L (approximately 6 mM). Both sulfate and hydroxyl radicals were proven to contribute to the removal of algae and the loss of cell integrity. The cultivated M. aeruginosa in death growth phase were found to be more vulnerable to UV/PS treatment than those growing in log phase, thus a significant lower dosage of PS is needed to achieve the desired removal efficiency. This study suggested a novel application of UV/PS process in the removal of algae in source waters due to the high degradation efficiency of both algal cells and their derived organic matter.
KW - Algal organic matter
KW - Cell integrity
KW - Microcystis aeruginosa
KW - Persulfate
KW - Ultraviolet
UR - http://www.scopus.com/inward/record.url?scp=84964904470&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2016.04.125
DO - 10.1016/j.cej.2016.04.125
M3 - Article
AN - SCOPUS:84964904470
SN - 1385-8947
VL - 300
SP - 245
EP - 253
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
ER -