【摘要】 为开发廉价高效去除水中重金属Cr(Ⅵ)污染的生物吸附剂,在以沉水植物菹草固形物作为吸附剂研究的基础上,对菹草进行改性以提高吸附性能,并以其为吸附剂进行吸附实验。改性菹草对Cr(Ⅵ)的去除率最高为99.6%,其对Cr(Ⅵ)的吸附动力学符合准二级动力学方程,吸附等温线符合Langmuir吸附等温线,最大吸附量可达64.5 mg/g,与未改性的菹草相比,最大吸附量提高了84.3%。更多还原

【Abstract】 In order to develop low-cost and efficient biosorbents which can remove heavy metal Cr(Ⅵ) pollution from water, and based on the research of submerged plant Potamogeton crispus solid-shaped material as adsorbent,Potamogeton crispus has been modified to improve its adsorption capability. Adsorption experiments on this adsorbent have been accomplished. The maximum removing rate of Cr( Ⅵ) by modified Potamogeton crispus is 99.6%. The Cr(Ⅵ) adsorption kinetics complies with the pseudo second-order kinetics equation and the adsorption isotherm complies with Langmuir isotherm model. Its maximum adsorption capacity can reach 64.5 mg/g. Compared with unmodi-fied Potamogeton crispus,the maximum adsorption capacity is increased by 84.3%.更多还原