华北典型地区农村生活污水中药品和个人护理产品(PPCPs)污染特征与生态风险评价

    Analysis on Pollution Characteristics and Ecological Risk Assessment of Pharmaceuticals and Personal Care Products (PPCPs) in Rural Domestic Sewage in Typical Areas of North China

    • 摘要: 随着我国农村经济迅速发展和生活水平提高, 以药品和个人护理产品(PPCPs)为主的新污染物(ECs)已广泛存在于农村地区。为了调查农村地区生活污水中新污染物的污染状况, 利用液相色谱-质谱联用仪(LC-MS/MS)检测了华北5个典型农村地区的污水处理站进出水中PPCPs的污染特征。结果表明, 华北5个典型农村生活污水处理站进出水中共检测出16种PPCPs, 浓度范围为ND~226 ng·L-1。其中, 林可霉素(LIN)、阿司匹林(ASA)、避蚊胺(DEET)和咖啡因(CAF)在所有水样中均有检出, 进水中浓度较高的3种PPCPs为咖啡因、诺氟沙星(NOR)和对乙酰氨基酚(ACT)。对比5个典型农村地区生活污水的进水PPCPs浓度范围, 发现污水的来源类型和黑灰水收集方式是主要影响因素。与国内外其他地区城市和农村污水相比, 5个典型地区农村生活污水中PPCPs的整体浓度范围约为城市污水的十分之一, 但是部分新污染物如罗红霉素(ROX)和诺氟沙星在本研究中的检出浓度要大于某些城市污水中的检出浓度。采用风险熵值法(RQs)评价污水处理站进出水中新污染物的生态风险, 氧氟沙星(OFL)、诺氟沙星和阿司匹林是高风险新污染物, 对乙酰氨基酚是中风险新污染物, 其他新污染物为低风险或无风险。因此, 农村生活污水中PPCPs类的新污染物需要引起更多关注。

       

      Abstract: The rapid economic growth and enhancement of living standards in rural areas of China have led to the widespread presence of emerging contaminants (ECs), particularly pharmaceuticals and personal care products (PPCPs), in these areas. To assess the pollution status of emerging contaminants in domestic wastewater in rural areas, liquid chromatography-mass spectrometry (LC-MS/MS) was employed to analyze the characteristics of PPCPs in the influent and effluent of wastewater treatment stations across five representative rural areas in North China. The findings reveal the detection of 16 PPCPs in both the influent and effluent of wastewater treatment stations, with concentrations ranging from non-detectable levels to 226 ng·L-1. Among them, lincomycin (LIN), aspirin (ASA), DEET and caffeine (CAF) were consistently identified in all water samples. The three PPCPs exhibiting the highest concentrations in the influent were caffeine (CAF), norfloxacin (NOR) and acetaminophen (ACT). A comparative analysis of the influent PPCP concentrations across the five rural areas indicat that the source type of wastewater and the methods employed for the collection of black and gray water were significant influencing factors. Compared with urban and rural wastewater in other regions at home and abroad, the overall concentration range of PPCPs in rural domestic wastewater in the five typical areas of this study is approximately one-tenth of that in urban wastewater. However, the concentrations of certain contaminants, such as roxithromycin (ROX) and norfloxacin (NOR), were found to exceed those observed in some urban wastewater. The ecological risk of emerging contaminants in the effluent water from the waste water treatment stations was evaluated by the risk quotient (RQs) method. Ofloxacin (OFL), norfloxacin (NOR) and aspirin (ASA) were classified as high-risk emerging contaminants, while acetaminophen (ACT) was categorized as medium-risk. The remaining emerging contaminants were assessed as low risk or non-risk. Consequently, there is a pressing need for increased attention to the presence of emerging contaminants such as PPCPs in rural domestic wastewater.

       

    /

    返回文章
    返回