内分泌干扰物2,4-二氯苯酚和双酚A对潜流人工湿地系统中微生物群落结构的影响
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摘要
本文对2,4-二氯苯酚(2,4-DCP)和双酚A(BPA)干扰下的潜流人工湿地COD和TN去除效果以及微生物群落生长情况进行了研究。研究发现在进水COD浓度为110mg/L,TN浓度为21mg/L,2,4-DCP和BPA浓度为10 mg/L,水力停留时间为6小时的条件下,添加2,4-DCP使潜流人工湿地系统COD和TN去除率降低了11.5%以及3.58%,添加BPA使潜流人工湿地系统COD和TN的去除效果降低了8.61%和6.19%。通过醌指纹技术测生物群落结构表明,添加2,4-DCP和BPA均导致潜流人工湿地系统中总醌量(TQ)、微生物多样性指数(DQ)和微生物种均匀度(EQ)不同程度的降低。进一步研究表明添加2,4-DCP对硝化细菌、放线菌、棒状杆菌和微球菌亚目有抑制作用,添加BPA对亚硝化细菌、棒状杆菌科和微球菌亚目有抑制作用。
引文
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[3]Editorial,Researchandinnovation on ecotechnologies applied to improve wastewater treatment efficiency[J].Ecological Engineering 2013,Vol,50:1-4.
[4]Fredrick O.K.,Ulrike D.,Gerhard W.,et.al,Enhanced degradation of 14C-HCB in two tropical clay soils using multiple anaerobic-aerobic cycles[J].Environmental Pollut,2013,Vol,173:168-175.
[5]ZhangD.Q.,HuaT.,Gersberg R.M.,eL al.,Fate of diclofenac in wetland mesocosms planted with Scirpus validus[J].Ecological Engineering2012,Vol,49:59-64.
[6]Vandenberg LN,Hauser R,Marcus M,et al.Human exposure to bisphenol A(BPA).Reprod Toxicol,2007,vol,24:139—177.
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