Modified Biopolymer Adsorbents for Column Treatment of Sulfate Species in Saline Aquifers.

ABSTRACT: In the present study, variable forms of pelletized chitosan adsorbents were prepared and their sulfate uptake properties in aqueous solution was studied in a fixed-bed column system. Unmodified chitosan pellets (CP), cross-linked chitosan pellets with glutaraldehyde (CL-CP), and calcium-doped forms of these pellets (Ca-CP, Ca-CL-CP) were prepared, where the removal efficiencies and breakthrough curves were studied. Dynamic adsorption experiments were conducted at pH 4.5 and 6.5 with a specific flow rate of 3 mL/min, fixed-bed height of 200 mm, and an initial sulfate concentration of 1000 mg/L. Breakthrough parameters demonstrated that Ca-CP had the best sulfate removal among the adsorbents, where the following adsorption parameters were obtained: breakthrough time (75 min), exhaust time (3

SUBMITTER: Solgi M 

PROVIDER: S-EPMC7288291 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature