{"type": "FeatureCollection", "features": [{"id": "10.1007/s11104-011-0948-y", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-28T16:15:22Z", "type": "Journal Article", "created": "2011-08-18", "title": "Biochar Reduces The Bioavailability And Phytotoxicity Of Heavy Metals", "description": "Biochar has attracted research interest due to its ability to increase the soil carbon pool and improve crop productivity. The objective of this study was to evaluate the metal immobilizing impact of chicken manure- and green waste-derived biochars, and their effectiveness in promoting plant growth. The immobilization and phytoavailability of Cd, Cu and Pb was examined using naturally contaminated shooting range and spiked soils. Biochar samples prepared from chicken manure and green waste were used as soil amendments. Application of biochar significantly reduced NH4NO3 extractable Cd, Cu and Pb concentrations of soils, indicating the immobilization of these metals. Chicken manure-derived biochar increased plant dry biomass by 353 and 572% for shoot and root, respectively with 1% of biochar addition. This might be attributed to reduced toxicity of metals and increased availability of nutrients such as P and K. Both biochars significantly reduced Cd, Cu and Pb accumulation by Indian mustard (Brassica juncea), and the reduction increased with increasing amount of biochar application except Cu concentration. Metal sequential fractionation data indicated that biochar treatments substantially modified the partitioning of Cd, Cu and Pb from the easily exchangeable phase to less bioavailable organic bound fraction. The results clearly showed that biochar application was effective in metal immobilization, thereby reducing the bioavailability and phytotoxicity of heavy metals.", "keywords": ["2. 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The scope of the review focused primarily on: (1) the analysis of poultry production and generation of poultry manure with special references to quantities, properties (e.g. fertilizing properties), seasonality, etc.; (2) the overview of current practices and methods for managing poultry manure including advantages and limitations; (3) the analysis of potential and realistic threats and risk related to managing poultry manure, and also (4) the analysis of promising technologies for converting poultry manure into added value products and energy. The review addressed the following technologies: composting of poultry manure to obtain fertilizers and soil improvers, anaerobic digestion of poultry manure for energy recovery, and also pyrolysis of poultry manure into different types of biochar that can be applied in agriculture, horticulture and industry. Poultry manure is rich in macro- and micronutrients but also can contain various contaminants such as antibiotics or pesticides, and thus posing a realistic threat to soil and living organisms when applied to soil directly or after biological treatment. The main challenge in poultry manure processing is to assure sufficient closing of carbon, nitrogen and phosphorous loops and safe application to soil.", "keywords": ["LITTER", "Nitrogen", "SEWAGE-SLUDGE", "0211 other engineering and technologies", "Circular", "ANAEROBIC CO-DIGESTION", "02 engineering and technology", "SORPTION", "Poultry manure", "Poultry", "12. Responsible consumption", "Soil", "METHANE", "Nutrient and energy recovery", "0202 electrical engineering", " electronic engineering", " information engineering", "Animals", "BIOGAS PRODUCTION", "ORGANIC FRACTION", "Fertilizers", "PRODUCTION", "2. Zero hunger", "BIOCHAR", "PYROLYSIS", "Composting", "Agriculture", "15. 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