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腐殖酸-重金属对ANAMMOX菌脱氮性能的影响及其动力学分析
摘要点击 487  全文点击 115  投稿时间:2021-10-15  修订日期:2021-11-04
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中文关键词  重金属  厌氧氨氧化(ANAMMOX)  腐殖酸  动力学  协同抑制
英文关键词  heavy metals  anaerobic ammonia oxidation (ANAMMOX)  humic acid  kinetics  synergistic inhibition
作者单位E-mail
李芸 东华理工大学核资源与环境国家重点实验室, 南昌 330013
东华理工大学水资源与环境工程学院, 南昌 330013 
liyun_jps@163.com 
崔楠 东华理工大学水资源与环境工程学院, 南昌 330013  
熊星星 东华理工大学水资源与环境工程学院, 南昌 330013  
黄志远 东华理工大学水资源与环境工程学院, 南昌 330013  
李泽兵 东华理工大学水资源与环境工程学院, 南昌 330013  
王东亮 东华理工大学核资源与环境国家重点实验室, 南昌 330013
东华理工大学水资源与环境工程学院, 南昌 330013 
 
李朝明 东华理工大学水资源与环境工程学院, 南昌 330013  
许丹 东华理工大学水资源与环境工程学院, 南昌 330013  
李军 北京工业大学建筑工程学院, 北京 100124  
中文摘要
      通过批次实验研究了两种典型重金属离子[Cu (Ⅱ)和Ni (Ⅱ)]与腐殖酸对厌氧氨氧化(ANAMMOX)脱氮效果(SAA)的影响并进行了动力学模型分析,同时探讨了腐殖酸-重金属对ANAMMOX脱氮的影响.结果表明,在投加ρ[Cu (Ⅱ)]和ρ[Ni (Ⅱ)]均为3 mg·L-1时,对ANAMMOX有促进作用,SAA分别提高了8.64%和7.78%;当ρ[Cu (Ⅱ)]和ρ[Ni (Ⅱ)]分别为20 mg·L-1和5 mg·L-1时则对ANAMMOX有抑制作用,抑制效果随重金属离子浓度增加而越发显著,指数拟合表明Cu (Ⅱ)和Ni (Ⅱ)对ANAMMOX的IC50分别为29.67 mg·L-1和28.75 mg·L-1.在投加ρ(腐殖酸)为1 mg·L-1时SAA提高了7.37%,40 mg·L-1时抑制率即达到36.80%,线性拟合表明腐殖酸对ANAMMOX菌的IC50为58.36 mg·L-1.修正的Michaelis-Menten模型能较好地描述重金属和腐殖酸对ANAMMOX的抑制动力学行为,拟合获得的Cu (Ⅱ)、Ni (Ⅱ)和腐殖酸对ANAMMOX菌活性完全抑制时的浓度(I*)分别为49.59、74.46和84.27 mg·L-1.适量的腐殖酸有利于改善重金属对ANAMMOX菌活性的抑制,过量的腐殖酸又会重新对ANAMMOX菌形成抑制.
英文摘要
      The effects of two typical heavy metal ions[Cu(Ⅱ) and Ni(Ⅱ)] and humic acid on ANAMMOX nitrogen removal (SAA) were studied through batch experiments, and the kinetic model was analyzed. At the same time, the effects of humic acid-heavy metal on ANAMMOX nitrogen removal were discussed. The results showed that ANAMMOX was promoted when ρ[Cu(Ⅱ)] and ρ[Ni(Ⅱ)] were 3 mg·L-1, and SAA was increased by 8.64% and 7.78%, respectively; ANAMMOX was inhibited when the ρ[Cu(Ⅱ)] and ρ[Ni(Ⅱ)] were 20 mg·L-1 and 5 mg·L-1, respectively, and the inhibition effect was more significant with the increase in heavy metal ion concentration. The index fitting showed that the IC50 of Cu(Ⅱ) and Ni(Ⅱ) on ANAMMOX were 29.67 mg·L-1 and 28.75 mg·L-1, respectively. SAA was increased by 7.37% when the ρ(humic acid) was 1 mg·L-1, and the inhibition rate reached 36.80% when the humic acid concentration was 40 mg·L-1. The linear fitting showed that the IC50 of humic acid on ANAMMOX was 58.36 mg·L-1. The modified Michaelis-Menten model could better describe the inhibitory kinetic behavior of heavy metals and humic acid on ANAMMOX. The model fitting showed that the complete inhibition concentrations (I*) of Cu(Ⅱ), Ni(Ⅱ), and humic acid on ANAMMOX were 49.59, 74.46, and 84.27 mg·L-1, respectively. An appropriate amount of humic acid was beneficial to improve the inhibition of heavy metals on ANAMMOX bacteria activity, and excessive humic acid would cause inhibition on ANAMMOX bacteria again.

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