Competitive removal of textile dyes from solution by pine bark-compost in batch and fixed bed column experiments

Compost from pine bark has been previously suggested as an effective low-cost biosorbent for different classes of textile dyes, although the existing studies have performed in non-competitive batch conditions, so effect competition or adsorption continuous-flow conditions not assessed. In this work, removal Basic Violet 10 (BV10) and Direct Blue 151 (DB151) by compost single bi-solute mixtures studied fixed-bed column experiments. Adsorption capacity was three times higher BV10 than DB151 where reduced uptake both with factors 0.63 0.82 BV10. Dye lower tests, 112.6 34.7 mg g−1 DB151, respectively, versus 127.1 42.1 conditions. The presence dyes solution also their affinities respect to saturation capacities 71.6 16.8 DB151. between columns 0.76 0.59 effectively regenerated using ethanol, thus enabling reuse practical application dye removal. concentration eluted ethanol influent concentration, what would give value pre-concentration dyes.