Coagulated Mineral Adsorbents for Dye Removal, and Their Process Intensification Using an Agitated Tubular Reactor (ATR)
نویسندگان
چکیده
The aim of this study was to understand the efficacy widely available minerals as dual-function adsorbers and weighter materials, for removal toxic azo-type textile dyes when combined with coprecipitation processes. Specifically, adsorption an anionic direct dye measured on various mineral types without secondary coagulation iron hydroxide (‘FeOOH’) in both a bench-scale stirred tank, well innovative agitated tubular reactor (ATR). Talc, calcite modified bentonite were all able remove 90–95% at 100 200 ppm concentrations, where kinetics fitted pseudo second-order rate model rapid (<30 min). Physical characterisation composite mineral-FeOOH sludges also completed through particle size sedimentation measurements, elemental scanning electron microscopy determine homogeneity coagulated structure. Removal >99% achieved systems, additionally, they produced significantly enhanced settling rates bed compression. greatest (9 mm min?1) solids content increase (450% w/w) observed calcium carbonate system, which displayed most homogenous distribution. This system selected scale-up benchmarking ATR. Dye sediment dispersion ATR respect bench scale tests, although lower due relatively high shear agitator. Overall, results highlight applicability these cost-effective sludge separation modifiers accelerate compression water treatment. Additionally, work indicates suitability flexible, modular alternative traditional tank reactors.
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ژورنال
عنوان ژورنال: ChemEngineering
سال: 2021
ISSN: ['2305-7084']
DOI: https://doi.org/10.3390/chemengineering5030035