TY - JOUR
T1 - Integrated Principal Component Analysis of Microcystis aeruginosa Dissolved Organic Matter and Assessment of UV-C Pre-Treatment on Cyanobacteria-Containing Water
AU - Ou, Hua Se
AU - Wei, Chao Hai
AU - Deng, Yang
AU - Gao, Nai Yun
PY - 2014/4
Y1 - 2014/4
N2 - The intrinsic characteristic of chromophoric dissolved organic matter (CDOM) and bioactivity materials derived from toxic Microcystis aeruginosa was investigated. Fluorescence excitation emission matrix combined with parallel factor analysis (EEM-PARAFAC) determined six CDOM components, and principal component analysis (PCA) identified two integrated principle factors. PCA factor 1 mainly represented the intracellular and extracellular microbial active components, and factor 2 represented the extracellular residuals and degraded products. These two PCA factors accounted for 53 and 31% of the variance in nine parameters distributions, and were used to assess the variation pattern of DOM. The variation tendencies of PCA factors in experiments using single UV-C (254nm), UV-C/H2O2, UV-C/HCO3-, UV-C/NO3-, and UV-C/humic acid were estimated. Photolysis and photo-oxidation were dominating processes in single UV-C irradiation, and H2O2 improved photo-oxidation, resulting in high efficient removal of intracellular DOM and extracellular DOM. The presences of HCO3-, NO3- and humic acid had negative effects on the degradation of extracellular DOM, but little influence on intracellular DOM. Results revealed that UV-C/H2O2 can be considered as an option for the pretreatment of cyanobacteria-contained water, and EEM-PARAFAC-PCA can be applied to simplify multiple parameters in water treatment process, which would be benefit to water quality monitoring and management.
AB - The intrinsic characteristic of chromophoric dissolved organic matter (CDOM) and bioactivity materials derived from toxic Microcystis aeruginosa was investigated. Fluorescence excitation emission matrix combined with parallel factor analysis (EEM-PARAFAC) determined six CDOM components, and principal component analysis (PCA) identified two integrated principle factors. PCA factor 1 mainly represented the intracellular and extracellular microbial active components, and factor 2 represented the extracellular residuals and degraded products. These two PCA factors accounted for 53 and 31% of the variance in nine parameters distributions, and were used to assess the variation pattern of DOM. The variation tendencies of PCA factors in experiments using single UV-C (254nm), UV-C/H2O2, UV-C/HCO3-, UV-C/NO3-, and UV-C/humic acid were estimated. Photolysis and photo-oxidation were dominating processes in single UV-C irradiation, and H2O2 improved photo-oxidation, resulting in high efficient removal of intracellular DOM and extracellular DOM. The presences of HCO3-, NO3- and humic acid had negative effects on the degradation of extracellular DOM, but little influence on intracellular DOM. Results revealed that UV-C/H2O2 can be considered as an option for the pretreatment of cyanobacteria-contained water, and EEM-PARAFAC-PCA can be applied to simplify multiple parameters in water treatment process, which would be benefit to water quality monitoring and management.
KW - Cyanobacterial bloom
KW - PARAFAC
KW - PCA
KW - Water quality
UR - http://www.scopus.com/inward/record.url?scp=84897444783&partnerID=8YFLogxK
U2 - 10.1002/clen.201200628
DO - 10.1002/clen.201200628
M3 - Article
AN - SCOPUS:84897444783
SN - 1863-0650
VL - 42
SP - 442
EP - 448
JO - Clean - Soil, Air, Water
JF - Clean - Soil, Air, Water
IS - 4
ER -