The properties of biochars derived from different plant residue and different pyrolysis temperatures

Öz

By determining the degraded and limiting properties of the soil, producing solutions for the improvement of these properties will be able to provide sustainable and efficient use of soil. Especially, low organic matter content of soils causes many problems. Studies on increasing the organic matter content of soils by using various plant residues and organic fertilizers constituted the subject of many researches. However, in recent years, the use of biochar obtained by pyrolysis of various plant materials at high temperatures has become popular. With the use of biochar, both the characteristics of soil are improved, and greenhouse effect is reduced. Furthermore, it provides the production of various biofuels. The attributes of obtained biochar vary with pyrolysis material and temperature. The aim of this study was to produce biochar by pyrolyzing diverse plant residues in different temperature conditions and determine some physical and chemical properties of the biochar. For this purpose, sunflower stalk, sunflower head, corn stalk, corn cob and wheat straw were converted to biochar’s at 300 °C, 400 °C, 500 °C, and 600 °C temperatures. Biochar yield, surface area, C/N ratio, pH and electrical conductivity (EC) values and water holding capacities of the experimental samples were determined. In the light of results, the highest surface area was found in sunflower stalk at 300 °C, while the lowest surface area was detected as in wheat straw at 300 °C. The C/N ratios increased in all the samples except corn stalk and corn cob.

Anahtar Kelimeler

• Biochar,plant residues,pyrolysis

Kaynakça

1. Bayram, Ö., 2015. Farklı tarımsal atıklardan üretilen biyoçarların çeşitli fiziksel ve kimyasal özelliklerinin belirlenmesi. Gaziosmanpaşa Üniv Fen Bil. Ens, Yüksek Lisans Tezi, Tokat, 46s.
2. Brewer, C.E., Schmidt-Rohr, K., Satrio, J.A., Brown, R.C., 2009. Characterization of biochar from fast pyrolysis and gasification systems. Environ Prog Sustain Energy 28: 386–396.
3. Chan, K., Xu, Z., 2009. Biochar: Nutrient properties and their enhancement. Earthscan, London.
4. Downie, A., Crosky, A., Munroe, P., 2009. Physical properties of biochar. In: Lehmann, J., Joseph, S. Biochar for Environmental Management Science and Technology. Earthscan, London, pp. 227–249.
5. Glaser, B., Lehmann, J., Zech, W., 2002. Ameliorating physical and chemical properties of highly weathered soils in the tropics with charcoal. Biology and Fertility of Soils 35: (4) 219–230.
6. Gugino, B., Idowu, O., Schindelbeck, R., Van Es, H., Moebius-Clune, B., Wolfe, D., Thies, J., Abawi, G., 2009. Cornell soil health assessment training manual. Edition 2.0, Cornell University, Geneva, NY.
7. Jindo, K., Mizumoto, H., Sawada, Y., Sanchez-Monedero, M.A., Sonoki, T., 2014. Physical and chemical characterization of biochars derived from different agricultural residues. Biogeosci 11: 6613-6621.
8. Kalderis, D., Kotti, M. S., Méndez, A., and Gascó, G., 2014. Characterization of hydrochars produced by hydrothermal carbonization of rice husk. Solid Earth, 5: 477–483.

9. Kloss, S., Zehetner, F., Dellantonio, A., Hamid, R., Ottner, F., Liedtke, V., Schwanninger, M., Gerzabek, M.H., Soja, G., 2012. Characterization of slow pyrolysis biochars. J. Environ. Qual. 41: 990–1000.
10. Lehmann, J., Gaunt, J. ve Rondon, M., 2006. Biochar sequestration in terrestrial ecosystems–a review. Mitigation and Adaptation Strategies for Global Change, 11 (2): 403-427. Minitab: Minitab reference manual (Release 7.1), Minitab Inc.,State Coll PA, 16801, USA, 1995.
11. Novak, J. M., Busscher, W. J., Laird, D. L., Ahmedna, M., Watts, D. W., Niandou, M. A., 2009. Impact of biochar amendment on fertility of a southeastern coastal plain soil. Soil Science, 174 (2): 105-112.
12. Song, Y., Zhang, X., Ma, B., Chang, S. X., Gong, J., 2014. Biochar addition affected the dynamics of ammonia oxidizers and nitrification in microcosms of a coastal alkaline soil. Biology and Fertility of Soils, 50 (2): 321-332.
13. Spokas, K.A., Reicosky, D.C., 2009. Impacts of sixteen different biochars on soilgreen gas production. Annals of Environmental Science 3: 179-193.
14. Wright, A. F., Bailey, J. S., 2001. Organic carbon, total carbon, and total nitrogen determinations in soils of variable calcium carbonate contents using a Leco CN-2000 dry combustion analyzer. Communications in Soil Science and Plant Analysis, 32 (19-20): 3243-3258.