TY - JOUR
T1 - Occurrence of algae and algae-related taste and odour (T&O) compounds in the Qingcaosha Reservoir, China
AU - Zhang, Kejia
AU - Zhang, Tuqiao
AU - Deng, Yang
AU - Gao, Naiyun
AU - Yang, Yulong
N1 - Publisher Copyright:
© IWA Publishing Journal of Water Supply: Research and Technology-AQUA 2015.
PY - 2015/11
Y1 - 2015/11
N2 - This study examined the temporal and spatial variations in the occurrence of major algae and algaerelated taste and odour (T&O) compounds in Qingcaosha Reservoir, China. Water samples were collected monthly from seven sites in the reservoir and analysed using solid phase microextraction combined with gas chromatography-mass spectrometry. Results showed that green algae were dominant over the 9-month study. In addition, cyanobacteria in the summer and early autumn peaked at 3.2 ∼ 9.6 × 106 cell/L. Among the four most common algae-related T&O compounds, dimethyl trisulphide was undetectable at any of the sampling sites, and 2-methylisoborneol (2-MIB), geosmin and β-cyclocitral were frequently over their respective odour threshold levels from August through October. β-cyclocitral concentration was linearly correlated with the concentration of cyanobacteria (R2 = 0.9831). The peak β-cyclocitral concentrations varied from 452 to 1, 293 ng/L and were observed close to the water table. In contrast, high concentrations of 2-MIB and geosmin occurred in the water overlying sediments, probably because some of the 2-MIB and geosmin came from the micro-organisms in the sediments. These results provide important information regarding algae and algae-related T&O compounds in a typical reservoir in estuary and coastal areas, and will be helpful for developing appropriate strategies to minimize undesirable T&O issues in water sources.
AB - This study examined the temporal and spatial variations in the occurrence of major algae and algaerelated taste and odour (T&O) compounds in Qingcaosha Reservoir, China. Water samples were collected monthly from seven sites in the reservoir and analysed using solid phase microextraction combined with gas chromatography-mass spectrometry. Results showed that green algae were dominant over the 9-month study. In addition, cyanobacteria in the summer and early autumn peaked at 3.2 ∼ 9.6 × 106 cell/L. Among the four most common algae-related T&O compounds, dimethyl trisulphide was undetectable at any of the sampling sites, and 2-methylisoborneol (2-MIB), geosmin and β-cyclocitral were frequently over their respective odour threshold levels from August through October. β-cyclocitral concentration was linearly correlated with the concentration of cyanobacteria (R2 = 0.9831). The peak β-cyclocitral concentrations varied from 452 to 1, 293 ng/L and were observed close to the water table. In contrast, high concentrations of 2-MIB and geosmin occurred in the water overlying sediments, probably because some of the 2-MIB and geosmin came from the micro-organisms in the sediments. These results provide important information regarding algae and algae-related T&O compounds in a typical reservoir in estuary and coastal areas, and will be helpful for developing appropriate strategies to minimize undesirable T&O issues in water sources.
KW - Algae
KW - Reservoir water
KW - Solid phase micro extraction
KW - Taste and odour
UR - http://www.scopus.com/inward/record.url?scp=84955445466&partnerID=8YFLogxK
U2 - 10.2166/aqua.2015.072
DO - 10.2166/aqua.2015.072
M3 - Article
AN - SCOPUS:84955445466
SN - 0003-7214
VL - 64
SP - 824
EP - 831
JO - Journal of Water Supply: Research and Technology - AQUA
JF - Journal of Water Supply: Research and Technology - AQUA
IS - 7
ER -