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绿色复合气凝以果皮/奇托桑/本托尼特为基础,用于从水矩阵中可持续地去除Cu (II)

Jing Nie¹, Dan Feng², Jiangwei Shang²

¹Key Laboratory of Pollutant Chemistry and Environmental Treatment, College of Resources and Environment, Yili Normal University, Yining, 835000, China. X8151329@163.com.

Scientific reports

|September 18, 2023

概括

来自果皮的新型气凝,奇托桑和本托尼特有效地从水中去除有毒的Cu (II) 离子. 这种可持续材料具有很高的吸附能力和选择性,为废水处理提供了具有成本效益的解决方案.

科学领域:

材料科学材料科学材料科学
环境科学环境科学
化学工程是化学工程的重要组成部分.

背景情况:

污染废水有毒重金属离子,特别是二,造成严重的环境和健康风险.
传统的重金属去除方法往往由于效率低,成本高以及二次污染而受到影响.
开发可持续和高效的吸附剂对于有效的水资源整治至关重要.

研究的目的:

开发一种绿色和可持续的3D多孔气凝复合材料,以有效地从水溶液中捕获Cu (II) 离子.
调查开发的气凝的吸附性能,机制和再生能力.
评估气凝作为工业废水处理的可行替代品的潜力.

主要方法:

通过sol-gel和冷干燥使用果皮 (CP),奇托桑 (CS) 和本托尼特 (BT) 制造3D多孔气凝 (CCBA-2).
批量吸附实验以确定Cu (II) 的吸附能力,异热和动力模型.
在共存的金属离子和各种水矩阵的存在下进行选择性测试.
动态固定床柱体实验和再生研究.
使用FTIR和XPS进行表征,以阐明吸附机制.

主要成果:

根据弗洛伊德利希和伪二阶模型,CCBA-2具有861.58毫克/克的高Cu (II) 吸附能力.
该气凝对Cu (II) 离子具有出色的选择性 (选择性系数K_d^Cu=1138.5),并且在各种水条件下具有稳定性.
固定床柱体实验显示Cu (II) 的吸附能力为377.4 mg/g,由尤恩-尼尔森模型描述得很好.
FTIR和XPS分析证实了通过静电吸引和化与功能群的吸附.
使用1M HNO₃的气凝在5个循环中成功再生,效率损失最小 (5.3%).

结论:

开发的以果皮为基础的气凝 (CCBA-2) 是一种高效,选择性和可再生的吸附剂,用于Cu (II) 的去除.
它的成本效益和环保性使其成为处理被铜污染的废水的有希望的材料.
该研究强调了利用废物生物质开发可持续环境修复技术的潜力.

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