title: Oxalate production at different initial Pb²+ concentrations and the influence of oxalate during solid-state fermentation of straw with Phanerochaete chrysosporium.
abstract: 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.
authors.affiliation: College of Environmental Science and Engineering, Hunan University, Changsha, Hunan 410082, China.
authors.forename: Ning-Jie
authors.initials: NJ
authors.lastname: Li
authors.forename: Guang-Ming
authors.initials: GM
authors.lastname: Zeng
authors.forename: Dan-Lian
authors.initials: DL
authors.lastname: Huang
authors.forename: Shuang
authors.initials: S
authors.lastname: Hu
authors.forename: Chong-Ling
authors.initials: CL
authors.lastname: Feng
authors.forename: Mei-Hua
authors.initials: MH
authors.lastname: Zhao
authors.forename: Cui
authors.initials: C
authors.lastname: Lai
authors.forename: Chao
authors.initials: C
authors.lastname: Huang
authors.forename: Zhen
authors.initials: Z
authors.lastname: Wei
authors.forename: Geng-Xin
authors.initials: GX
authors.lastname: Xie
mesh_terms: D002851:Chromatography, High Pressure Liquid; D005285:Fermentation; D006863:Hydrogen-Ion Concentration; D007854:Lead / Q000378:metabolism*; D010070:Oxalates / Q000378:metabolism*; D020075:Phanerochaete / Q000378:metabolism*
chemical_list: D010070:Oxalates; D007854:Lead