Biochar Derived from Sewage Sludge as a Soil Amendment: The Impact of Pyrolysis Temperature on Product Characteristics Along with Heavy Metal Environmental Risk
T. M. Bauer, V. A. Polyakov, T. M. Minkina, M. V. Kirichkov, M. A. Gritsai, Z. B. Namsaraev, V. D. Rajput
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Abstract
The purpose of this research was to investigate the impact of pyrolysis temperature on the properties of biochars fabricated by sewage sludge. Increasing pyrolysis temperature from 300 to 900°С led to an increase of biochar pH between 8.4–11.8, ash content 60–75% as well as specific surface area 68–161 m2 g–1. At the same time, there were reduced H, O, C, S, N contents, the H/C and O/C ratios. An increase in pyrolysis temperature enhanced the content of metals in biochars and reduced their bioavailability. XRD analysis confirmed a higher degree of metal-containing phases of formation in biochar with increasing pyrolysis temperature.
期刊介绍：
Nanobiotechnology Reports publishes interdisciplinary research articles on fundamental aspects of the structure and properties of nanoscale objects and nanomaterials, polymeric and bioorganic molecules, and supramolecular and biohybrid complexes, as well as articles that discuss technologies for their preparation and processing, and practical implementation of products, devices, and nature-like systems based on them. The journal publishes original articles and reviews that meet the highest scientific quality standards in the following areas of science and technology studies: self-organizing structures and nanoassemblies; nanostructures, including nanotubes; functional and structural nanomaterials; polymeric, bioorganic, and hybrid nanomaterials; devices and products based on nanomaterials and nanotechnology; nanobiology and genetics, and omics technologies; nanobiomedicine and nanopharmaceutics; nanoelectronics and neuromorphic computing systems; neurocognitive systems and technologies; nanophotonics; natural science methods in a study of cultural heritage items; metrology, standardization, and monitoring in nanotechnology.
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