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Earthworms increase the potential for enzymatic bio-activation of biochars made from co-pyrolyzing animal manures and plastic wastes
- Source :
- Journal of hazardous materials. 408
- Publication Year :
- 2020
-
Abstract
- We assessed the enzymatic activation of four different biochars produced from pyrolyzing swine manure and poultry litter, and by co-pyrolyzing these livestock residues with agricultural spent mulch plastic film wastes (plastichars). Enzymatic activation consisted of incubating biochars in soil inoculated with earthworms (Lumbricus terrestris), which acted as biological vectors to facilitate retention of extracellular enzymes onto biochar surface. The activity of carboxylesterase ‒a pesticide-detoxifying enzyme‒ was measured in non-bioturbed soils (reference), linings of the burrows created by earthworms, casts (feces) and biochar particles recovered from the soil. Our results revealed that: 1) biochar increased soil carboxylesterase activity respect to biochar-free (control) soils, which was more prominent in the presence of earthworms. 2) The maximum enzyme activity was found in soils amended with plastichars. 3) The plastichars showed higher enzyme binding capacities than that of the biochars produced from animal manure alone, corroborating the pattern of enzyme distribution found in soil. 4) The presence of earthworms in soil significantly increased the potential of the plastichars for enzymatic activation. These findings suggest that the plastichars are suitable for increasing and stabilizing soil enzyme activities with no toxicity on earthworms.
- Subjects :
- Environmental Engineering
Swine
Health, Toxicology and Mutagenesis
0211 other engineering and technologies
02 engineering and technology
010501 environmental sciences
complex mixtures
01 natural sciences
Soil
Biochar
Environmental Chemistry
Animals
Soil Pollutants
Oligochaeta
Waste Management and Disposal
Poultry litter
0105 earth and related environmental sciences
021110 strategic, defence & security studies
biology
Chemistry
biology.organism_classification
Pollution
Manure
Enzyme assay
Enzyme binding
Environmental chemistry
Charcoal
Soil water
biology.protein
Mulch
Plastics
Lumbricus terrestris
Subjects
Details
- ISSN :
- 18733336
- Volume :
- 408
- Database :
- OpenAIRE
- Journal :
- Journal of hazardous materials
- Accession number :
- edsair.doi.dedup.....92d4d4b8fb5869fe8dbfc3127df30e32