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Improving biochar properties by co-pyrolysis of pig manure with bio-invasive weed for use as the soil amendment
- Source :
- CHEMOSPHERE
- Publication Year :
- 2023
- Publisher :
- Elsevier BV, 2023.
-
Abstract
- Over recent years, pyrolysis has grown into a mature technology with added value for producing soil improvers. Further innovations of this technology lie in developing tailor-made products from specific feedstocks (or mix-tures thereof) in combination with adjusted mixing ratio-temperature regimes. In this context, co-pyrolysis of pig manure (PM) and the invasive plant Japanese knotweed (JK) at different mixture ratios (w/w) of 3:1 (P3J1), 1:1 (P1J1), and 1:3 (P1J3) and varying temperatures (400 & ndash;700 ???C) was studied to address the low carbon properties and heavy metals (HMs) risks of manure-derive biochars and beneficially ameliorate the bio-invasion situation by creating value from the plant biomass. Co-pyrolysis of PM with JK increased by nearly 1.5 folds the fixed carbon contents in the combined feedstock biochars obtained at 600 ???C compared with PM-derived biochar alone, and all combined feedstock biochars met the requirements for soil improvement and carbon sequestration. The total HMs in PM biochars were significantly reduced by adding JK. The combined feedstock biochar P1J1 generated at 600 ???C was the most effective in transforming Cu and Zn into more stable forms, accordingly reducing the associated environmental risk of heavy metal leaching from the biochar. In addition, the accumulation of macronutrients can be an added benefit of the co-pyrolysis process, and P1J1-600 was also the biochar that retained the most nutrients (P, Ca, Mg, and K).
- Subjects :
- Technology and Engineering
Pig manure
Environmental Engineering
Swine
Health, Toxicology and Mutagenesis
Invasive plant
Temperature
Public Health, Environmental and Occupational Health
Plant Weeds
Nutrients
General Medicine
General Chemistry
Pollution
Carbon
Manure
Soil
Metal speciation
Earth and Environmental Sciences
Charcoal
Metals, Heavy
Animals
Environmental Chemistry
Biochar aromaticity
Pyrolysis
Subjects
Details
- ISSN :
- 00456535 and 18791298
- Volume :
- 312
- Database :
- OpenAIRE
- Journal :
- Chemosphere
- Accession number :
- edsair.doi.dedup.....82bb7d4d959e20717479733f5d2693a4