TY - JOUR ID - 74108 TI - The effect of Pyrolysis Temperature and Type of Organic Residues on Physicochemical Properties of Produced Biochar JO - Iranian Journal of Soil and Water Research JA - IJSWR LA - en SN - 2008-479X AU - MalehMir Chegini, Mohamad AU - Golchin, Ahmad AU - Khadem Moghadam Igdelou, Nader AU - Moraveij, Kamran AD - Department of Soil Science, Faculty of Agriculture, University of Zanjan, Zanjan, Iran. AD - department of soil science, Faculty of Agriculture, University of Zanjan, Zanjan, Iran. Y1 - 2020 PY - 2020 VL - 51 IS - 3 SP - 575 EP - 593 KW - Almond hull KW - enrichment ratio KW - functional groups KW - walnut hull KW - wheat straw DO - 10.22059/ijswr.2019.289906.668332 N2 - Biochar has attracted the attention of many researchers because of its ability to improve soil fertility, immobilization of pollutants, as well as a suitable method of carbon sequestration and as a carbon reservoir. In order to investigate the effect of pyrolysis temperature and type of organic residues on physicochemical properties of biochars, a completely randomized designe as a factorial experiment was designed with two factors of organic residues type (wheat straw and walnut and almond bark) and pyrolysis temperature (300 and 500°C) in three replicates. The results showed that EC, pH, ash, and CEC of biochar increased at pyrolysis temperature of 300°C. By increasing the pyrolysis temperature to 500°C, the amount of organic carbon (OC), CEC, and surface functional groups of biochar decreased compared to biochar produced at 300 °C whereas pH, ash, and EC increased. The highest EC, pH, water soluble materials, ash, and the lowest bulk density were recorded in wheat straw biochar produced at 500°C. The highest value of equivalent calcium carbonate was obtained in almond peel biochar produced at 500°C. Biochar production yield decreased and the loss of volatile compound such as CO2 increased by increasing the pyrolysis temperature from 300°C to 500°C. In addition, the characteristics of biochar were dependent on type of feedstock and pyrolysis conditions (temperature and time residence). UR - https://ijswr.ut.ac.ir/article_74108.html L1 - https://ijswr.ut.ac.ir/article_74108_8a44ed6fcc26b81eabe3dcd68fe2cfa2.pdf ER -