Department of Chemistry, Water and Wastewater Technology, Częstochowa University of Technology, Częstochowa, Poland.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2011;46(3):248-57. doi: 10.1080/10934529.2011.535413.
This study was undertaken to investigate the removal of PAHs by UV-rays from treated wastewater. Samples of wastewater originating from a municipal treatment plant were taken twofold (series I and series II). The initial concentration of PAHs ranged: 0.8 μg/L (in series I) and 1.2 μg/L (in series II), respectively. A standard mixture of 16 compounds was added to the wastewater samples. The amount of individual hydrocarbons in the added mixture was equal to 40 μg/L, (in series I) and 50 μg/L, (in series II), respectively. The samples of wastewater without the added standard mixture were treated as a control samples. All samples of wastewater were exposed to UV-rays during 10, 20, 30 and 60 seconds, respectively. Afterwards, the PAHs concentration in both the wastewater samples containing the standard mixture and in the control samples was determined. Determinations of PAHs concentration in wastewater samples in each series were made in triplicates. A quantitative analysis of PAHs was provided by gas chromatography-mass spectrometry (GC-MS). It was found that exposition to ultraviolet rays resulted in the decrease in the concentration of PAHs in the wastewater samples without added standard mixture up to 65%. The efficiency of the removal of hydrocarbons grouped according to a number of rings was in the range of 0 (for 5- ring and 6-ring of PAHs) to 71% (for naphthalene). It was also found that exposure of wastewater samples to UV-rays resulted in a decrease of PAHs concentration in wastewater samples with the added standard mixture up to 84%. The efficiency of the removal of hydrocarbons grouped according to a number of rings differed significantly (to 94% for naphthalene).
本研究旨在探讨紫外线对处理后废水中多环芳烃（PAHs）的去除效果。采集了来自城市处理厂的废水样本，分为两组（系列 I 和系列 II）。PAHs 的初始浓度范围分别为：0.8μg/L（系列 I）和 1.2μg/L（系列 II）。向废水样本中加入了一种 16 种化合物的标准混合物。添加混合物中各烃类物质的含量分别为 40μg/L（系列 I）和 50μg/L（系列 II）。未添加标准混合物的废水样本作为对照样本。所有废水样本均在紫外线照射下分别处理 10、20、30 和 60 秒。随后，测定含有标准混合物和对照样本的废水样本中的 PAHs 浓度。在每个系列中，均对废水样本中的 PAHs 浓度进行了三次重复测定。采用气相色谱-质谱联用仪（GC-MS）对 PAHs 浓度进行定量分析。结果表明，紫外线照射可使未添加标准混合物的废水样本中的 PAHs 浓度降低 65%。根据环数对烃类物质进行分组的去除效率范围为 0（5-环和 6-环 PAHs）至 71%（萘）。还发现，紫外线照射可使添加标准混合物的废水样本中的 PAHs 浓度降低 84%。根据环数对烃类物质进行分组的去除效率存在显著差异（萘为 94%）。
