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Influence of inoculating white-rot fungi on organic matter transformations and mobility of heavy metals in sewage sludge based composting.

Identifieur interne : 000145 ( Main/Curation ); précédent : 000144; suivant : 000146

Influence of inoculating white-rot fungi on organic matter transformations and mobility of heavy metals in sewage sludge based composting.

Auteurs : Chaosheng Zhang [République populaire de Chine] ; Ying Xu [République populaire de Chine] ; Meihua Zhao [République populaire de Chine] ; Hongwei Rong [République populaire de Chine] ; Kefang Zhang [République populaire de Chine]

Source :

RBID : pubmed:29032096

Descripteurs français

English descriptors

Abstract

White-rot fungi, Phanerochaete chrysosporium was inoculated to sewage sludge composting. Its effect on transformation of organic matter and mobility of heavy metals (Zn, Pb, Cu, and Ni) was studied. Detailed sampling was performed to measure C contents in humic extracts (HE), humic acids (HAs), fulvic acids (FAs), humin and distribution of heavy metals, including acid exchangeable fraction (AE), reducible fraction (RED), oxidization fraction (OXI) and residual fraction (RES). In our study, it is evident that the HE, HAs increased obviously and hydrolyzed humin decreased markedly in inoculation. The stabilization rate ((OXI+RES)/(AE+RED)) of Zn, Pb, Cu, and Ni was 20.31%, 7%, 14.3% and 19.79% higher in inoculating reactor. Additionally, the changes of heavy metals fractions could be explained by the organic variables. The results of this study demonstrated that Phanerochaete chrysosporium passivates the heavy metal by provoking the formation of humus.

DOI: 10.1016/j.jhazmat.2017.10.017
PubMed: 29032096

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pubmed:29032096

Le document en format XML

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<term>Metals, Heavy (analysis)</term>
<term>Phanerochaete (MeSH)</term>
<term>Sewage (analysis)</term>
<term>Soil (chemistry)</term>
<term>Water Pollutants, Chemical (analysis)</term>
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<term>Benzopyranes (analyse)</term>
<term>Compostage (MeSH)</term>
<term>Eaux d'égout (analyse)</term>
<term>Métaux lourds (analyse)</term>
<term>Phanerochaete (MeSH)</term>
<term>Polluants chimiques de l'eau (analyse)</term>
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<term>Substances humiques (analyse)</term>
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<div type="abstract" xml:lang="en">White-rot fungi, Phanerochaete chrysosporium was inoculated to sewage sludge composting. Its effect on transformation of organic matter and mobility of heavy metals (Zn, Pb, Cu, and Ni) was studied. Detailed sampling was performed to measure C contents in humic extracts (HE), humic acids (HAs), fulvic acids (FAs), humin and distribution of heavy metals, including acid exchangeable fraction (AE), reducible fraction (RED), oxidization fraction (OXI) and residual fraction (RES). In our study, it is evident that the HE, HAs increased obviously and hydrolyzed humin decreased markedly in inoculation. The stabilization rate ((OXI+RES)/(AE+RED)) of Zn, Pb, Cu, and Ni was 20.31%, 7%, 14.3% and 19.79% higher in inoculating reactor. Additionally, the changes of heavy metals fractions could be explained by the organic variables. The results of this study demonstrated that Phanerochaete chrysosporium passivates the heavy metal by provoking the formation of humus.</div>
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