使用四种惰性干生物质高效去除和:对吸附机制的洞察
Candelaria Tejada-Tovar1, Angel Villabona-Ortíz1, Ángel Darío González-Delgado2
1Process Design and Biomass Utilization Research Group (IDAB), Chemical Engineering Department, Universidad de Cartagena, Avenida del Consulado St. 30, Cartagena de Indias 130015, Colombia.
Materials (Basel, Switzerland)
|July 14, 2023
概括
农业废物,如玉米残留物,可可皮,香皮和麻瓜皮,有效地从水中去除重金属和. 这些生物吸附剂具有很高的容量,香皮在去除方面最有效.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 废物管理 废物管理
背景情况:
- 水溶液中的重金属污染对环境和健康构成重大风险.
- 开发可持续和经济有效的吸附剂来去除重金属至关重要.
- 农业副产品为生物吸收剂开发提供了一个有希望的来源.
研究的目的:
- 评估从农业废物中提取的惰性干燥生物吸收剂的有效性,以去除 (Pb2+) 和 (Ni2+) 离子.
- 研究这些生物吸附剂的吸附机制和物理化学特性.
- 为了确定重金属去除的吸附能力和动力学.
主要方法:
- 从玉米残留物 (CCR),可可皮 (CH),香皮 (PP) 和麻豆皮 (CP) 制备生物吸收剂.
- 批量吸附实验,以评估从合成水溶液中去除重金属.
- 生物吸附性质的表征和吸附机制的评估 (静电吸引,离子交换,表面复杂化,离子交换,沉).
- 使用伪二次模型的动力建模和使用兰格穆尔模型的同热分析.
主要成果:
- 所有测试的生物吸收剂都显示有效地去除了Pb2+和Ni2+离子.
- 在所有生物吸收剂中,Pb2+的生物吸收能力高于Ni2+.
- 松果皮 (PP) 显示了Pb2+ (699.267 mg/g) 的最高单层吸附能力.
- 吸附率按照 Pb2+ 的顺序为 CH > CP > CCR > PP, Ni2+ 的顺序为 CH > CCR > PP > CP.
- 吸附机制涉及静电吸引,阴离子交换,表面复杂化,离子交换和沉.
结论:
- 农业废物如CCR,CH,PP和CP是有效和可持续的生物吸附剂,用于从水溶液中去除Pb2+和Ni2+.
- 该研究强调了这些低成本材料在废水处理方面的潜力.
- 建议进行进一步的研究,以探索它们在工业规模和连续流系统中的应用.
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