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Comparison of the water quality of the surface microlayer and subsurface water in the Guangzhou segment of the Pearl River, China

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文摘 The water quality in the surface microlayer (SML) and subsurface water (SSW) in the Guangzhou segment of Pearl River, a eutrophic urban river section in China, were analyzed. The spatial and temporal dynamics of nutrient concentrations, heavy metals and bacteria were examined from two sampling sites in monthly samples throughout 2010. The mean concentrations of total nitrogen, ammonia, nitrate and nitrite were higher than 7.0 mg/L, 3.1 mg/L, 1.1 mg/L and 0.3 mg/L, while total phosphorus and orthophosphate were 0.5 mg/L and 0.1 mg/L, respectively. These results indicated that the water quality was rich in minerals and eutrophic. The mean concentrations of Mn and Fe were higher than 0.013 mg/L; and Ni, Cr and Pb were higher than 0.001 mg/L. The mean concentrations were in the order of Mn >Fe > Ni > Pb > Cr. The concentrations of heavy metals in the Guangzhou segment were lower than the limit of the surface water quality standards in China and the World Health Organization (WHO), but higher than the median values in the world’s freshwater. The density of bacteria ranged from 3.30×105 to 5.23×106 cells/mL, and the amount of cultivable heterotrophic bacteria ranged from 1.30×103 to 1.89×106 cfu/mL. Fecal coliform levels were beyond the V class of China water quality standard. The SML was enriched in nutrients, heavy metals and bacteria, with the maximum enrichment factor of 3.84 for nutrients, 8.00 for heavy metals, and 3.04 for bacteria, suggesting that the water quality of the SML of the Guangzhou segment of the Pearl River was more serious than in the SSW.
来源 Journal of Geographical Sciences ,2014,24(3):475-491 【核心库】
DOI 10.1007/s11442-014-1101-7
关键词 surface microlayer ; nutrients ; heavy metal ; microbes ; Guangzhou segment ; Pearl River
地址

1. Institute of Hydrobiology, Jinan University(Guangdong), Key Laboratory of Aquatic Eutrophication and Control of Harmful Algal Blooms of Guangdong Higher Education Institutes;;Engineering Research Center of Tropical and Subtropical Aquatic Ecological Engineering, Ministry of Education, Guangzhou, 510632  

2. Institute of Hydrobiology, Jinan University(Guangdong), Key Laboratory of Aquatic Eutrophication and Control of Harmful Algal Blooms of Guangdong Higher Education Institutes;;Engineering Research Center of Tropical and Subtropical Aquatic Ecological Engineering, Ministry of Education;;Key Laboratory of South C, Guangzhou, 510632  

3. Beijing Normal University–Hong Kong Baptist University Untied International College, Guangdong, Zhuhai, 519000

语种 英文
文献类型 研究性论文
ISSN 1009-637X
学科 环境质量评价与环境监测
基金 Jinan University Project ;  The Project of Department of Science and Technology ;  国家自然科学基金
文献收藏号 CSCD:5069326

参考文献 共 64 共4页

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