从含有酸改性磁性生物质的水体中有效消除Hg(II) 消耗咖啡粉:条件优化和应用
Dingli Cheng1, Yiwen Li1, Xinyu Zheng1
1School of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China.
概括
一种新的磁性消耗咖啡粉 (NiFe2O4/SCG) 吸收剂有效地从水中去除 (Hg(II)). 这种可持续材料在真实水体中具有很高的吸附能力和稳定性.
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:
- 生物质废弃物,如消耗的咖啡粉 (SCG),构成了严重的废物管理挑战.
- 有效利用生物质废弃物对于可持续的环境实践至关重要.
- 水体中的 (Hg) 污染构成严重的生态和健康风险.
研究的目的:
- 从消耗的咖啡粉中开发一种新的磁吸附剂,用于去除.
- 调查开发的Hg的吸附剂的吸附效率和机制.
- 评估吸附剂在各种水矩阵中的实际适用性.
主要方法:
- 在473K的热解和共同沉被用来合成酸修饰的磁性NiFe2O4/SCG.
- 进行了批量吸附实验,以确定最佳条件 (pH,温度,剂量).
- 使用响应表面方法 (RSM) 来优化Hg的吸附能力.
主要成果:
- 这种NiFe2O4/SCG吸附剂具有很高的磁强度 (45.78emu/g),使其易于分离.
- 最佳吸附条件是pH值为8,温度为39°C,剂量为0.055g/L.
- 根据伪二次动力学和兰木尔异热模型,最大的Hg (II) 吸附能力达到167.44 mg/g.
- 吸附过程是内热的,涉及离子交换,静电吸引和化.
- 吸附剂表现出良好的再生能力,稳定性和常见水污染物的最小干扰.
结论:
- 经过酸修改的磁性消耗咖啡粉 (NiFe2O4/SCG) 是一种高效的吸附剂,可以从水中去除Hg (II).
- 开发的吸附剂为控制污染提供了可持续和高效的解决方案.
- 在处理受污染的水体方面,NiFe2O4/SCG具有重要的实际应用潜力.
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