Effect of gasification biochar application on soil quality: Trace metal behavior, microbial community, and soil dissolved organic matter
| Autor: | Filip Tack, Young Han Lee, Chi-Hwa Wang, Ana Tsibart, Daniel C.W. Tsang, Yong Sik Ok, Hyungseok Nam, Jin Hur, Xiao Yang, Ali El-Naggar |
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| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
Health Toxicology and Mutagenesis Soil biology 0211 other engineering and technologies 02 engineering and technology 010501 environmental sciences complex mixtures 01 natural sciences Soil Dissolved organic carbon Biochar Environmental Chemistry Trace metal Waste Management and Disposal Environmental Restoration and Remediation Humic Substances Soil Microbiology 0105 earth and related environmental sciences 021110 strategic defence & security studies Chemistry Microbiota Pollution Soil quality Trace Elements Soil conditioner Solubility Microbial population biology Metals Charcoal Environmental chemistry Gases Pyrolysis |
| Zdroj: | Journal of Hazardous Materials. 365:684-694 |
| ISSN: | 0304-3894 |
| Popis: | Compared to pyrolysis biochar (PBC), gasification biochar (GBC) differs in both composition and surface functionalities due to the use of an oxidizing purging gas. This work compares the effect of using PBC and GBC as soil amendments on the soil properties, trace metal bioavailability, soil microbial activity, and soil dissolved organic matter (DOM). Biochar-driven reduction of bioavailable metals does not necessarily result in a positive impact on the soil microbial growth. The DOM in the soil was strongly related to the soil microbial activity, as revealed by the strong correlation between the soil dehydrogenase activity (DHA) and soil dissolved organic carbon (r = 0.957, p 0.01). Three identified fluorescent components (C1, C2, C3) in the soil DOM were closely associated with the soil microbial activity, for instance, with a clear positive correlation between the soil DHA and C1 (r = 0.718, p 0.05) and a significant negative correlation between the total bacterial fatty acid methyl ester content and C3 (r = -0.768, p 0.05). The bioavailability of Cd and Zn is not only related to the pH and surface functionalities of the biochar, but also to its aromatic carbon and inorganic mineral composition. This study further demonstrates that a fluorescence excitation-emission matrix coupled with parallel factor analysis is a useful tool to monitor changes in the soil quality after application of biochar, which is greatly relevant to the soil biota. |
| Databáze: | OpenAIRE |
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