研究报告
王凌云,张锡辉,陶益.城市污水处理厂内分泌干扰物浓度分布和去除规律[J].环境科学学报,2012,32(11):2741-2747
城市污水处理厂内分泌干扰物浓度分布和去除规律
- Occurrence and removal of typical endocrine disrupting chemicals in sewage treatment plants
- 基金项目：国家水体污染控制与治理科技重大专项(No.2009ZX07423-001);水利部公益性行业专项(No.20120133);国家自然科学基金项目(No.51108244)
- 作者
- 单位
- 王凌云
- 清华大学深圳研究生院环境工程与管理研究中心,深圳 518055
- 张锡辉
- 清华大学深圳研究生院环境工程与管理研究中心,深圳 518055
- 陶益
- 清华大学深圳研究生院环境工程与管理研究中心,深圳 518055
- 摘要：采集南方某城市3个污水处理厂进出水及各工艺单元的水样,通过固相萃取-衍生化过程对水样进行预处理,并用气相色谱-质谱联用仪定量检测水样中的17α-雌二醇(17α-E2)、雌酮(E1)、雌二醇(E2)、雌炔醇(EE2)、雌三醇(E3)、辛基酚(OP)、正壬基酚(NP)和双酚A(BPA)等8种内分泌干扰物(EDCs).连续4个季度的分析结果显示,3个污水厂进出水及各工艺单元中均有EDCs检出,EE2和BPA是含量最高的两种EDCs,出水中最高浓度分别达到498.9 ng·L-1和2652.5 ng·L-1,其他6种EDCs浓度均不超过100 ng·L-1;生物处理工艺对EE2、E3、NP、OP和BPA有较高的去除率,平均去除率约为57%~85%,但对于E1、E2和17α-E2的去除率较低且不稳定;一级处理工艺对EDCs仅有低于18%的去除率;紫外辐照消毒工艺对EDCs的去除没有明显效果;EDCs浓度季节差异显著,由于雨水的稀释作用,旱季浓度约为雨季的2.5~7.8倍.本文对于了解我国南方地区污水处理工艺中EDCs类物质的分布和转化特点有一定的参考意义.
- Abstract：Eight endocrine disrupting chemicals (EDCs), including 17α-estradiol (17α-E2), estrone (E1), estradiol (E2), ethinylestradiol (EE2), estriol (E3), octylphenol (OP), nonyphenol (NP) and bisphenol A (BPA), were investigated in three sewage treatment plants (STPs) in southern China. Sampling was conducted along treatment process train from influent to effluent in four seasons, and the levels of EDCs were detected with solid phase extraction method and GC-MS instrument. The results showed that target EDCs were identified in all treatment units. EE2 and BPA were two dominant EDCs with to the maximum levels of 498.9 ng·L-1 and 2652.5 ng·L-1, respectively. The concentrations of other six EDCs were lower than 100 ng·L-1. Biological processes in two STPs were effective in removing EE2, E3, NP, OP and BPA, with average removal ratio between 57% and 85%. It was however less effective for E1, E2 and 17α-E2 removal. Primary treatment of coagulation and sedimentation can only remove up to 18% of EDCs. It was also found that UV irradiation as disinfection method has no obvious influence on EDCs removal. Seasonal variation of EDCs levels was significant, and the total concentrations of eight EDCs in dry season was 2.5~7.8 times those in wet season. This study is of significance in understanding distribution and transformation of EDCs in STPs in southern China.
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