Oxalate production at different initial Pb²+ concentrations and the influence of oxalate during solid-state fermentation of straw with Phanerochaete chrysosporium.

Ning-Jie Li, Guang-Ming Zeng, Dan-Lian Huang, Shuang Hu, Chong-Ling Feng, Mei-Hua Zhao, Cui Lai, Chao Huang, Zhen Wei, Geng-Xin Xie

College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China.

Bioresource technology 2011 Sep

filter terms:

The production of oxalate at different initial Pb(2+) concentrations during solid-state fermentation of straw with Phanerochaete chrysosporium was investigated. It was found that the maximal peak value of oxalate concentration (22.84 mM) was detected at the initial Pb(2+) concentration of 200 mg kg(-1) dry straw, while the minimum (15.89 mM) at the concentration of 600 mg Pb(2+)kg(-1) dry straw, and at moderate concentration of Pb(2+) the capability of oxalic acid secretion was enhanced. In addition, it was also found that more oxalic acid accumulation went together with better Pb(2+) passivation effect and higher manganese peroxidase (MnP) activity. The present findings will improve the understandings of the interactions of heavy metals with white-rot fungi and the role of oxalate in lignin degradation system, which could provide useful references for more efficient treatment of Pb-contaminated lignocellulosic waste. Copyright © 2011 Elsevier Ltd. All rights reserved.

Citation

Ning-Jie Li, Guang-Ming Zeng, Dan-Lian Huang, Shuang Hu, Chong-Ling Feng, Mei-Hua Zhao, Cui Lai, Chao Huang, Zhen Wei, Geng-Xin Xie. Oxalate production at different initial Pb²+ concentrations and the influence of oxalate during solid-state fermentation of straw with Phanerochaete chrysosporium. Bioresource technology. 2011 Sep;102(17):8137-42