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首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >Removal Efficiency and Risk Assessment of Polycyclic Aromatic Hydrocarbons in a Typical Municipal Wastewater Treatment Facility in Guangzhou China
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Removal Efficiency and Risk Assessment of Polycyclic Aromatic Hydrocarbons in a Typical Municipal Wastewater Treatment Facility in Guangzhou China

机译：广州市典型城市污水处理厂中多环芳烃的去除效率和风险评估

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The loading and removal efficiency of 16 US EPA polycyclic aromatic hydrocarbons (PAHs) were examined in an inverted A2/O wastewater treatment plant (WWTP) located in an urban area in China. The total PAH concentrations were 554.3 to 723.2 ng/L in the influent and 189.6 to 262.7 ng/L in the effluent. The removal efficiencies of ∑PAHs in the dissolved phase ranged from 63 to 69%, with the highest observed in naphthalene (80% removal). Concentration and distribution of PAHs revealed that the higher molecular weight PAHs became more concentrated with treatment in both the dissolved phase and the dewatered sludge. The sharpest reduction was observed during the pretreatment and the biological phase. Noncarcinogenic risk, carcinogenic risk, and total health risk of PAHs found in the effluent and sewage sludge were also assessed. The effluent BaP toxic equivalent quantities (TEQBaP) were above, or far above, standards in countries. The potential toxicities of PAHs in sewage effluent were approximately 10 to 15 times higher than the acceptable risk level in China. The health risk associated with the sewage sludge also exceeded international recommended levels and was mainly contributed from seven carcinogenic PAHs. Given that WWTP effluent is a major PAH contributor to surface water bodies in China and better reduction efficiencies are achievable, the present study highlights the possibility of utilizing WWTPs for restoring water quality in riverine and coastal regions heavily impacted by PAHs contamination.
机译：在位于中国城市地区的倒置A 2 / O废水处理厂（WWTP）中，检测了16种US EPA多环芳烃（PAHs）的装载和去除效率。进水中PAH的总浓度为554.3至723.2 ng / L，出水中PAH的总浓度为189.6至262.7 ng / L。溶解相中∑PAHs的去除率介于63％至69％之间，其中萘的去除率最高（去除率达80％）。 PAHs的浓度和分布表明，较高分子量的PAHs在溶解相和脱水污泥中都经过处理后变得更加浓缩。在预处理和生物阶段观察到最大的减少。还评估了废水和污水污泥中发现的多环芳烃的非致癌风险，致癌风险和总健康风险。出水中BaP的有毒当量（TEQBaP）高于或远远高于国家标准。污水中多环芳烃的潜在毒性比中国可接受的风险水平高约10至15倍。与污水污泥相关的健康风险也超过了国际建议水平，主要是由七个致癌的多环芳烃造成的。鉴于污水处理厂的废水是中国地表水体中主要的多环芳烃贡献者，并且可以实现更好的减排效率，因此本研究强调了利用污水处理厂来恢复受多环芳烃污染严重影响的河流和沿海地区水质的可能性。

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