Comparison of biochar properties from 5 kinds of halophyte produced by slow pyrolysis at 500 °C

Abstract Glycophyte biomass-derived biochars are currently concerned in most studies. However, little attention is given to the characteristics of halophyte-derived biochars. In this study, five typical halophytes euhalophytes ( Suaeda altissima , salsa and Kalidium foliatum ), recretohalophytes Phragmites australis pseudohalophytes Tamarix chinensis ) which widely distributed arid semiarid regions northwestern China were selected for producing with a slow pyrolysis process at 500 °C 1 h. The harvested characterized elemental content, pores, surface area, charges, then their potential value as soil conditioner was evaluated. results showed that had variable ash Na + contents, ranging from 7.26 23.64% 1.06 33.93 g kg ?1 respectively. EC ranged 1.76 23.45 mS cm . biochar derived very low specific area (SSA), 3.50 m 2 while (B PA high SSA, 344.02 All carried both positive negative charges. KF possessed more SA contained general, halophyte higher content lower point zero net charge (PZNC) value, compared glycophytes, would imply an acidic conditioner.