Effects of 17β-estradiol pollution on water microbial methane oxidation activity.
17β-estradiol (17β-E2), a widespread and natural estrogen in the environment, has imposed a serious threat to the safety and function of aquatic ecosystems because of worsening pollution and high potential toxicity. In the present study, the authors focus on the impact of 17β-E2 pollution on water microbial methane oxidation function. The authors investigated the mechanism of its influence on water microbial activity and discuss the growth rate of methane-oxidizing bacteria. The results showed that 17β-E2 could significantly inhibit the function of water microbial methane oxidation. When 17β-E2 concentration was ≥ 5 ng L(-1) , the methane oxidation rate increased with increasing 17β-E2 and finally settled to a constant value. Furthermore, the authors found no significant linear correlation between 17β-E2 concentrations and its methane oxidation rate. However, increasing 17β-E2 dramatically improved water microbial community activity, because a significant or highly significant promotion in the generation rate of CO2 was measured. Moreover, within a certain period of time and at certain concentrations, positive linear correlation existed between water CO2 generation rate and 17β-E2 concentrations. In addition, the growth rate of culturable methane-oxidizing bacteria was promoted when 17β-E2 pollution concentration from 2 ng L(-1) to 20 ng L(-1) . Therefore, 17β-E2 pollution can inhibit microbial methane oxidation function in water, which indirectly promotes the release of water methane and directly contributes to the rate of water-generated and released CO2 . Specifically, 17β-E2 pollution can promote water emissions of greenhouse gases. Environ
['Ruan|Aidong|A|', 'Zong|Fengjiao|F|', 'Zhao|Ying|Y|', 'Liu|Chenxiao|C|', 'Chen|Jing|J|']
D001419:Bacteria D002245:Carbon Dioxide D002681:China D004958:Estradiol D004967:Estrogens D019015:Geologic Sediments D008697:Methane D010084:Oxidation-Reduction D045483:Rivers D014871:Water Microbiology D014874:Water Pollutants, Chemical D014876:Water Pollution
17β-estradiol Methane Methane oxidation function Methane-oxidizing bacteria Carbon dioxide