Co-Occurrence of Microcystins and Taste-and-Odor Compounds in Drinking Water Source and Their Removal in a Full-Scale Drinking Water Treatment Plant
Open Access
- 2 January 2018
- Vol. 10 (1), 26
- https://doi.org/10.3390/toxins10010026
Abstract
The co-occurrence of cyanotoxins and taste-and-odor compounds are a growing concern for drinking water treatment plants (DWTPs) suffering cyanobacteria in water resources. The dissolved and cell-bound forms of three microcystin (MC) congeners (MC-LR, MC-RR and MC-YR) and four taste-and-odor compounds (geosmin, 2-methyl isoborneol, β-cyclocitral and β-ionone) were investigated monthly from August 2011 to July 2012 in the eastern drinking water source of Lake Chaohu. The total concentrations of microcystins and taste-and-odor compounds reached 8.86 μg/L and 250.7 ng/L, respectively. The seasonal trends of microcystins were not consistent with those of the taste-and-odor compounds, which were accompanied by dominant species Microcystis and Dolichospermum. The fate of the cyanobacteria and metabolites were determined simultaneously after the processes of coagulation/flocculation, sedimentation, filtration and chlorination in the associated full-scale DWTP. The dissolved fractions with elevated concentrations were detected after some steps and the breakthrough of cyanobacteria and metabolites were even observed in finished water. Chlorophyll-a limits at intake were established for the drinking water source based on our investigation of multiple metabolites, seasonal variations and their elimination rates in the DWTP. Not only microcystins but also taste-and-odor compounds should be taken into account to guide the management in source water and in DWTPs.Keywords
Funding Information
- National Natural Science Foundation of China (41471075, 41171366)
This publication has 30 references indexed in Scilit:
- High diversity of microcystins in a Microcystis bloom from an Algerian lakeEnvironmental Pollution, 2016
- Cyanobacteria and Cyanotoxins Occurrence and Removal from Five High-Risk Conventional Treatment Drinking Water PlantsToxins, 2015
- Spatial and temporal variability in the relationship between cyanobacterial biomass and microcystinsEnvironmental Monitoring and Assessment, 2012
- A systematic study on spatial and seasonal patterns of eight taste and odor compounds with relation to various biotic and abiotic parameters in Gonghu Bay of Lake Taihu, ChinaScience of The Total Environment, 2010
- The 2007 water crisis in Wuxi, China: Analysis of the originJournal of Hazardous Materials, 2010
- Cyanotoxin Mixtures and Taste-and-Odor Compounds in Cyanobacterial Blooms from the Midwestern United StatesEnvironmental Science & Technology, 2010
- Spatial and temporal diversity of microcystins and microcystin-producing genotypes in Oneida Lake, NYHarmful Algae, 2008
- Seasonal occurrence and toxicity of Microcystis spp. and Oscillatoria tenuis in the Lebna Dam, TunisiaWater Research, 2008
- Spatial distribution and temporal variation of Microcystis species composition and microcystin concentration in Lake BiwaEnvironmental Toxicology and Water Quality, 2005
- AQUATIC TASTE AND ODOR: A PRIMARY SIGNAL OF DRINKING-WATER INTEGRITYJournal of Toxicology and Environmental Health, Part A, 2004