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浙江大学学报(工学版)
J4  2010, Vol. 44 Issue (2): 349-352    DOI: 10.3785/j.issn.1008-973X.2010.02.025
    
Influence factors of humus reduction by acclimated sediments of West Lake
XU Zhi-wei, CHEN Hong
（Institute of Environment Engineering, Zhejiang University, Hangzhou 310027, China）
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Abstract  

By using acclimated sediments of West Lake, the effects of temperature, pH, different nitrogen sources, and different metal ions on humus microbial reduction were preliminarily analyzed with anthraquinone-2,6-disulfonate (AQDS) as humus model compound. Experimental results show that acclimated sediments can reduce humus during 15～45 ℃ and the optimum temperature is 30～37 ℃. Humus reduction was occurred at initiative pH 4～9, and the optimum pH is 7. The degree of humus reductive activities caused by different nitrogen sources is NH4Cl> CO(NH2)2> NaNO3> NaNO2. Mg2+、Mn2+ enhanced humus microbial reduction, but Zn2+、Ni2+、Cu2+ showed partial inhibition for humus reduction, and Hg2+ completely inhibited humus reduction.

Published: 09 March 2010
CLC:  X 17  
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Cite this article:

XU Zhi-Wei, CHEN Gong. Influence factors of humus reduction by acclimated sediments of West Lake. J4, 2010, 44(2): 349-352.

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http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2010.02.025     OR     http://www.zjujournals.com/eng/Y2010/V44/I2/349


驯化的西湖底泥还原腐殖质影响因素研究

利用驯化的西湖底泥,以蒽醌-2,6-双磺酸盐（AQDS）作为腐殖质模式物,初步研究了温度、pH、不同类型氮源、不同种类金属离子等对底泥微生物还原腐殖质的影响.结果发现,在15～45 ℃下驯化底泥能还原腐殖质,最适反应温度为30～37 ℃；在反应初始pH为4～9的条件下可进行腐殖质还原,最适pH为7；不同类型氮源对微生物还原腐殖质的效果依次为NH4Cl＞CO(NH2)2＞NaNO3＞NaNO2；Mg2+、Mn2+促进了微生物还原腐殖质,而Zn2+、Ni2+、Cu2+部分地抑制了腐殖质还原,Hg2+则完全抑制腐殖质还原.

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