title: Characteristics and nutrient values of biochars produced from giant reed at different temperatures.
abstract: To investigate the effect of pyrolysis temperature on properties and nutrient values, biochars were produced from giant reed (Arundo donax L.) at 300-600°C and their properties such as elemental and mineral compositions, release of N, P and K, and adsorption of N and P were determined. With increasing temperatures, more N was lost and residual N was transformed into heterocyclic-N, whereas no P and K losses were observed. P was transformed to less soluble minerals, resulting in a reduction in available-P in high-temperature biochars. A pH of⩽5 favored release of NH(4)(+), PO(4)(3-) and K(+) into water. Low-temperature biochars (⩽ 400°C) showed appreciable NH(4)(+) adsorption (2102mgkg(-1)). These results indicate that low-temperatures may be optimal for producing biochar from giant reed to improve the nutrient availability.
authors: College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China.
authors: Hao
authors: H
authors: Zheng
authors: Zhenyu
authors: Z
authors: Wang
authors: Xia
authors: X
authors: Deng
authors: Jian
authors: J
authors: Zhao
authors: Ye
authors: Y
authors: Luo
authors: Jeff
authors: J
authors: Novak
authors: Stephen
authors: S
authors: Herbert
authors: Baoshan
authors: B
authors: Xing
mesh_terms: D000327:Adsorption; D002606:Charcoal / Q000737:chemistry*; D006358:Hot Temperature; D006863:Hydrogen-Ion Concentration; D009566:Nitrates / Q000737:chemistry; D009584:Nitrogen / Q000737:chemistry; D010710:Phosphates / Q000737:chemistry; D010758:Phosphorus / Q000737:chemistry; D006109:Poaceae / Q000737:chemistry*; D011188:Potassium / Q000737:chemistry; D000644:Quaternary Ammonium Compounds / Q000737:chemistry; D013997:Time Factors
chemical_list: D009566:Nitrates; D010710:Phosphates; D000644:Quaternary Ammonium Compounds; C540010:biochar; D002606:Charcoal; D010758:Phosphorus; D009584:Nitrogen; D011188:Potassium