Characteristics and mechanisms of nickel adsorption on biochars produced from wheat straw pellets and rice husk.

ABSTRACT: The adsorption characteristics and mechanisms of Ni²⁺ on four-standard biochars produced from wheat straw pellets (WSP550, WSP700) and rice husk (RH550, RH700) at 550 and 700 °C, respectively, were investigated. The kinetic results show that the adsorption of Ni²⁺ on the biochars reached an equilibrium within 5 min. The increase of the solid to liquid ratio resulted in an increase of Ni²⁺ removal percentage but a decrease of the adsorbed amount of Ni²⁺ per weight unit of biochar. The Ni²⁺ removal percentage increased with the increasing of initial solution pH values at the range of 2-4, was relatively constant at the pH range of 4-8, and significantly increased to ≥98% at pH 9 and stayed constantly at the pH range of 9-10. The calculat

SUBMITTER: Shen Z 

PROVIDER: S-EPMC5418241 | biostudies-literature | 2017 May

REPOSITORIES: biostudies-literature