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Integrated Principal Component Analysis of Microcystis aeruginosa Dissolved Organic Matter and Assessment of UV‐C Pre‐Treatment on Cyanobacteria‐Containing Water
Author(s) -
Ou HuaSe,
Wei ChaoHai,
Deng Yang,
Gao NaiYun
Publication year - 2014
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201200628
Subject(s) - colored dissolved organic matter , dissolved organic carbon , microcystis aeruginosa , principal component analysis , chemistry , humic acid , environmental chemistry , organic matter , extracellular , cyanobacteria , microcystin , fulvic acid , degradation (telecommunications) , bacteria , biochemistry , biology , organic chemistry , telecommunications , fertilizer , phytoplankton , artificial intelligence , nutrient , computer science , genetics
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 (254 nm), UV‐C/H 2 O 2 , UV - C / HC O 3 − , UV - C / N O 3 − , and UV‐C/humic acid were estimated. Photolysis and photo‐oxidation were dominating processes in single UV‐C irradiation, and H 2 O 2 improved photo‐oxidation, resulting in high efficient removal of intracellular DOM and extracellular DOM. The presences of HC O 3 − , N O 3 −and humic acid had negative effects on the degradation of extracellular DOM, but little influence on intracellular DOM. Results revealed that UV‐C/H 2 O 2 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.