Screening of 1300 organic micro-pollutants in groundwater from Beijing and Tianjin, North China
| Autor: | Lingxiao Kong, Hong Thi Cam Chau, Hanh Thi Duong, Kiwao Kadokami |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
China
Environmental Engineering 010504 meteorology & atmospheric sciences Water Wells Health Toxicology and Mutagenesis Fresh Water 010501 environmental sciences 01 natural sciences Antioxidants chemistry.chemical_compound Beijing Humans Environmental Chemistry Pesticides Polycyclic Aromatic Hydrocarbons Groundwater 0105 earth and related environmental sciences Naphthalene Pollutant Carbendazim Drinking Water Australia Public Health Environmental and Occupational Health General Medicine General Chemistry Pesticide Contamination Pollution Pharmaceutical Preparations chemistry Environmental chemistry Environmental science Water Pollutants Chemical Dimethyl phthalate Environmental Monitoring |
| Zdroj: | Chemosphere. 165:221-230 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2016.08.084 |
| Popis: | Groundwater contamination in China has become a growing public concern because of the country's rapid economic development and dramatically increasing fresh water demand. However, there is little information available on groundwater quality, particularly with respect to trace organic micro-pollutants contamination. This study was undertaken to investigate the occurrence of 1300 pollutants at 27 groundwater sites in Beijing and Tianjin, North China. Seventy-eight chemicals (6% of the targeted compounds) were detected in at least one sampling point; observed chemicals included polycyclic aromatic hydrocarbons (PAHs), pesticides, plasticizers, antioxidants, pharmaceuticals and other emerging compounds. Chemicals with a frequency of detection over 70% were 2-ethyl-1-hexanol (median concentration 152 ng L −1 ), benzyl alcohol (582 ng L −1 ), 2-phenoxy-ethanol (129 ng L −1 ), acetophenone (74 ng L −1 ), pentamethylbenzene (51 ng L −1 ), nitrobenzene (40 ng L −1 ) and dimethyl phthalate (64 ng L −1 ). Pesticides with concentrations exceeding the EU maximum residual limits (MRL) of 0.1 μg L −1 were 1,4-dichlorobenzene, oxadixyl, diflubenzuron, carbendazim, diuron, and the E and Z isomers of dimethomorph. Naphthalene and its 7 alkylated derivatives were widely observed at maximum concentration up to 30 μg L −1 , which, although high, is still below the Australian drinking water guidelines of 70 μg L −1 . The risk assessment indicated there is no human health risk through the oral consumption from most wells, although there were four wells in which total seven compounds were found at the concentrations with a potential adverse health effects. This work provides a wide reconnaissance on broad spectrum of organic micro-contaminants in groundwater in North China. |
| Databáze: | OpenAIRE |
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