Department of Chemistry, Federal University of Rio de Janeiro, Aluísio da Silva Gomes street, 50, Macaé, RJ, CEP: 27930-560, Brazil.
National Public Health School Sérgio Arouca -Fiocruz- RJ, Leopoldo Bulhões, 1480, Manguinhos, RJ, CEP: 21041-210, Brazil.
Environ Sci Pollut Res Int. 2019 Oct;26(28):28614-28621. doi: 10.1007/s11356-018-3752-x. Epub 2019 Jan 3.
Pistia stratiotes is a common aquatic plant of the northern region of the state of Rio de Janeiro, and its use as adsorbent material was studied in the present work. The preparation process included washing, drying, grinding, and acid activation. The sorption potential for removal of the indigo carmine dye from aqueous solutions was tested under various conditions, such as initial concentration, contact time, and temperature. The tests showed that the obtained biosorbent showed good performance for dye removal with a maximum capacity of 41.2 mg/g. The kinetic studies revealed that the pseudo-second-order equation provided the best fit of the experimental data. The Freundlich isotherm provided the best fit of the experimental sorption data for the system under study. The results obtained show that Pistia stratiotes has great potential to be used as biosorbent for the removal of dyes from aqueous solutions.
水盾草是里约热内卢州北部常见的水生植物，本工作研究了将其用作吸附材料。制备过程包括清洗、干燥、研磨和酸活化。在各种条件下测试了该吸附剂从水溶液中去除靛蓝胭脂红染料的吸附潜力，例如初始浓度、接触时间和温度。测试表明，所得到的生物吸附剂对染料去除具有良好的性能，最大去除能力为 41.2mg/g。动力学研究表明，准二级方程最能拟合实验数据。对于所研究的体系，Freundlich 等温线最能拟合实验吸附数据。研究结果表明，水盾草具有作为从水溶液中去除染料的生物吸附剂的巨大潜力。
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