Chemical Engineering, Federal University of Pampa, 1650 Maria Anunciação Gomes Godoy Avenue, Bagé, Rio Grande do Sul, 96413-172, Brazil.
Graduate Program in Materials Science and Engineering, Technology Development Center, Federal University of Pelotas, 1 Gomes Carneiro, Pelotas, Rio Grande do Sul, 96010-610, Brazil.
Environ Sci Pollut Res Int. 2023 Apr;30(18):52472-52484. doi: 10.1007/s11356-023-26068-4. Epub 2023 Feb 25.
In this study, the Sphagnum perichaetiale Hampe biomass was collected, characterized, and used as a biosorbent in the removal of crystal violet from water. The chemical and morphological results suggest that even after minimal experimental procedures, the biomass presented interesting properties regarding the adsorption of contaminants. Results of adsorption showed that the pH was not a relevant parameter and the best adsorbent dosage was 0.26 g L. The kinetic results presented an initial fast step and the equilibrium was reached after 180 min. For the equilibrium data, the best adjustment occurred for the Sips model, reaching a maximum adsorption capacity of 271.05 mg g and the removal percentage obtained in the maximum adsorbent dosage was 97.11%. The thermodynamic studies indicated a reversible process and that the mass-transfer phenomena is governed by the physisorption mechanism. In addition to its great performance as a biosorbent, Sphagnum perichaetiale biomass also presents economic and sustainable benefits, as its production does not require costs with reagents or energy, usually used in chemical and physical activation. The reversible process indicated that the biosorbent could be reused, decreasing the costs related to the treatment of the effluents. Thus, Sphagnum perichaetiale biomass can be considered an efficient low-cost and eco-friendly biosorbent.
在这项研究中，我们采集了泥炭藓叶枝藻的生物质，对其进行了特性分析，并将其用作从水中去除结晶紫的生物吸附剂。化学和形态学结果表明，即使经过最基本的实验程序，该生物质在吸附污染物方面也表现出了有趣的特性。吸附结果表明，pH 值不是一个相关参数，最佳吸附剂用量为 0.26 g/L。动力学结果表明存在初始快速步骤，180 分钟后达到平衡。对于平衡数据，Sips 模型的拟合效果最好，最大吸附容量为 271.05 mg/g，在最大吸附剂用量下的去除率达到 97.11%。热力学研究表明这是一个可逆过程，质量传递现象受物理吸附机制控制。除了作为生物吸附剂的出色性能外，泥炭藓叶枝藻生物质还具有经济和可持续的优势，因为其生产不需要通常用于化学和物理活化的试剂或能源成本。可逆过程表明，生物吸附剂可以重复使用，降低与处理废水相关的成本。因此，泥炭藓叶枝藻生物质可以被认为是一种高效、低成本、环保的生物吸附剂。
