Temporal microcystin dynamics of the source water and finished water in a waterworks of Lake Taihu

被引：3

作者：

Fan Y. ^{[1
]}

Jiang W. ^{[1
]}

Liu B. ^{[2
,3
]}

Chang W. ^{[1
]}

Wu Z. ^{[2
]}

机构：

[1] Jiangsu Province Key Laboratory of Environmental Engineering, Jiangsu Provincial Academy of Environmental Science, Nanjing

[2] State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing

[3] Graduate University of Chinese Academy of Sciences, Beijing

来源：

Hupo Kexue/Journal of Lake Sciences | 2018年 / 30卷 / 01期

关键词：

Cyanobacteria blooms; Drinking water safety; Gonghu Bay; Lake Taihu; Microcystins; Potential risk; Water source area;

D O I：

10.18307/2018.0103

中图分类号：

学科分类号：

摘要：

Harmful cyanobacteria blooms, which are caused by water eutrophication, is still one of the serious water environment problems encountered by the whole world. In order to estimate the current status of microcystins (MCs) in the source water and finished water of Lake Taihu, we examined the concentrations of intracellular MC (intraMCs) and extracellular MC (extraMCs) and related physiochemical parameters of the source water and finished water in a waterworks in August 2014. Our results showed that the mean concentration of intraMCs in the source water was 7165.5 ng/L, dominated by MC-LR and MC-RR, with the mean concentration of 3408.7 and 3398.8 ng/L, respectively, and MC-RR accounted for 56.1% of the total MCs. The extraMCs in the source water were still on a low level with the mean and maximum value of 142.6 and 512.8 ng/L, respectively. However, the concentrations of intraMCs in finished water were relatively on a low level (mean value of 0.77 ng/L) with the removal efficiency above 99.98%. Although extraMCs in finished water were also detected on a low level (mean value of 21.71 ng/L), the concentration and detection frequencies of extraMCs were significantly higher than those of intraMCs with removal efficiency of 62.9%-81.8%. Data analysis showed that the significant and positive correlation was observed between concentrations of intraMCs and extraMCs in source water. Meanwhile, intraMCs were significantly correlated with total nitrogen (TN), ammonium (NH4+-N), total phosphorus (TP), chemical oxygen demand (CODMn) and turbidity, while extraMCs were significantly and positively correlated with TN, TP, CODMn, turbidity and chlorophyll-a. In addition, according to stepwise multiple linear regression analysis, TP could explain most of the variance of intraMCs in source water, while the variations of extraMCs could be primarily explained by intraMCs. Finally, according to non-carcinogenic risk index, MCs in finished water presented a relative low threat to the people there, while the risks will be higher when considering carcinogenic risk. © 2018 by Journal of Lake Sciences.

引用

页码：25 / 33

页数：8

共 36 条

[1]

Qin B.Q., Yang G.J., Ma J.R., Et al., Dynamics of variability and mechanism of harmful cyanobacteria bloom in Lake Taihu, China, Chin Sci Bull, 61, 7, pp. 759-770, (2016)

[2]

Yang G.S., Ma R.H., Zhang L., Et al., Lake status, major problems and protection strategy in China, J Lake Sci, 22, 6, pp. 799-810, (2010)

[3]

Xie P., A review on the studies related to the effects of microcystins on human health, J Lake Sci, 21, 5, pp. 603-613, (2009)

[4]

Xue Q.J., Su X.M., Xie L.Q., Advances on cyanotoxin toxicology of zoobenthos, Acta Ecol Sin, 35, 14, pp. 4570-4578, (2015)

[5]

Van Apeldoorn M.E., Van Egmond H.P., Speijers G.J., Et al., Toxins of Cyanobacteria, Molecular Nutrition & Food Research, 51, 1, pp. 7-60, (2007)

[6]

Gupta N., Pant S.C., Vijayaraghavan R., Et al., Comparative toxicity evaluation of cyanobacterial cyclic peptide toxin microcystin variants (LR, RR, YR) in mice, Toxicology, 188, 2-3, pp. 285-296, (2003)

[7]

Neilan B.A., Pearson L.A., Muenchhoff J., Et al., Environmental conditions that influence toxin biosynthesis in Cyanobacteria, Environmental Microbiology, 15, 5, pp. 1239-1253, (2013)

[8]

Xue Q., Steinman A.D., Su X., Et al., Temporal dynamics of microcystins in Limnodrilus Hoffmeisteri, a dominant Oligochaete of hypereutrophic Lake Taihu, China, Environmental Pollution, 213, pp. 585-593, (2016)

[9]

Rivasseau C., Martins S., Hennion M.C., Determination of some physicochemical parameters of Microcystins (Cyanobacterial Toxins) and trace level analysis in environmental samples using liquid chromatography, Journal of Chromatography A, 799, 1-2, pp. 155-169, (1998)

[10]

Tai N.D., Lam P.K.S., Shaw G.R., Et al., Toxicology and risk assessment of freshwater Cyanobacterial (Blue-Green Algal) toxins in water, Reviews of Environmental Contamination & Toxicology, 163, 163, (2000)

← 1 2 3 4 →