Response Surface Optimization of Adsorption Conditions of Cr (VI) from Wastewater by Modified brewer's grains

摘要

Surface response optimization of Adsorption Conditions of Cr(VI) wastewater by modified brewer's grains with the factors of pH value, adsorption temperature, adsorption time, amount of adsorbent and the response of adsorption rate were studied. The optimal parameters for Adsorption Conditions were of adsorbent concentration of 60 mg·L~(-1), adsorbent particle size of 60～80 mesh, pH 2.23, adsorbent amount of 3.64 g·L~(-1), adsorption time and temperature of 1.13 h and 30 °C, respectively. The maximal absorption rate got 97.45%.The modified brewer's grains is a promising, cheap, efficient, new biological materials of adsorption for Cr (VI) in wastewater.