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根系分泌物调控对人工湿地去除雌激素的影响

杨可昀 宋海亮 黄诗蓓 戴保琳 高韵辰 杨小丽

杨可昀, 宋海亮, 黄诗蓓, 戴保琳, 高韵辰, 杨小丽. 根系分泌物调控对人工湿地去除雌激素的影响[J]. 环境科学研究, 2016, 29(1): 59-66.
引用本文: 杨可昀, 宋海亮, 黄诗蓓, 戴保琳, 高韵辰, 杨小丽. 根系分泌物调控对人工湿地去除雌激素的影响[J]. 环境科学研究, 2016, 29(1): 59-66.
YANG Keyun, SONG Hailiang, HUANG Shibei, DAI Baolin, GAO Yunchen, YANG Xiaoli. Influence of Different Root Exudates on Steroidal Estrogen Removal in Constructed Wetlands[J]. Research of Environmental Sciences, 2016, 29(1): 59-66.
Citation: YANG Keyun, SONG Hailiang, HUANG Shibei, DAI Baolin, GAO Yunchen, YANG Xiaoli. Influence of Different Root Exudates on Steroidal Estrogen Removal in Constructed Wetlands[J]. Research of Environmental Sciences, 2016, 29(1): 59-66.

根系分泌物调控对人工湿地去除雌激素的影响

基金项目: 国家自然科学基金项目(41571476);江苏省自然科学基金项目(BK20141117)

Influence of Different Root Exudates on Steroidal Estrogen Removal in Constructed Wetlands

  • 摘要: 通过在所构建的3组垂直流人工湿地(CW1、CW2、CW3)中添加不同ρ(DOC)(0、14、28 mg/L,DOC为溶解性有机碳)的美人蕉根系浸出液来模拟根系分泌物浓度变化,考察其对2种SEs(steroidal estrogens,类固醇雌激素)去除效果的影响. 结果表明:①虽然根系浸出液和根系分泌物中的ρ(DOC)存在差异,但二者成分比例类似,均含有多种小分子化合物(如氨基酸、多糖、有机酸、脂肪酸、醇、烷等),并且甘油含量均为最高. ②各组湿地对SEs的去除率表现为CW2>CW3≈CW1,CW2对E1(Estrone,雌酮)、EE2(17α-Ethinylestradiol,17α-乙炔基雌二醇)的去除率最高可分别达到86.9%、72.7%. ③各组湿地全细菌和AOB(ammonia oxidizing bacteria, 氨氧化细菌)平均密度大小表现为CW3>CW2>CW1,NOB(nitrite oxidation bacteria, 亚硝酸氧化细菌)平均密度大小表现为CW2>CW3>CW1,DNB(denitrifying bacteria, 反硝化细菌)平均密度大小表现为CW3>CW1≈CW2,各组湿地基质上生物膜的脱氢酶活性表现为CW2>CW1>CW3.研究显示,适量添加根系浸出液有利于SEs的去除,但根系浸出液中ρ(DOC)过高,可能会对植物根系和特定根系微生物(如NOB)的生长造成毒害作用,并抑制微生物活性,从而影响SEs的去除效果.

     

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出版历程
  • 收稿日期:  2015-07-10
  • 修回日期:  2015-09-11
  • 刊出日期:  2016-01-25

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