通过微波辅助的一步性热解和蒸汽激活来制备红色泥改性污泥,以及其对硫化的吸附性质

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Mengyao Zhu¹, Mingtao Hu¹, Wenyi Deng¹

¹School of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Songjiang Dist., Shanghai, 201620, PR China.

|November 11, 2024

概括

红色泥改性污泥炭有效吸附硫化 (H2S),使其容量增加了15倍以上. 这种具有成本效益的,可重复使用的材料为使用废品的环境整治提供了有希望的解决方案.

科学领域:

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

背景情况:

污泥衍生的煤炭具有有限的硫化 (H₂S) 吸附能力.
像红泥 (RM) 和污泥这样的废物材料存在处置挑战.
从废物中开发高效的吸附剂对于环境修复至关重要.

研究的目的:

为了提高污泥衍生炭的H2S吸附性能.
准备和描述红色泥改性污泥炭 (RSC).
研究RSC制剂的最佳条件及其吸附性质.

主要方法:

微波辅助的一步性热解和污泥和RM的蒸汽激活.
响应表面的方法来优化热解温度,RM百分比和蒸汽流量.
进行X射线衍射 (XRD),X射线光电子光谱 (XPS),吸附同热和热力学分析.

主要成果:

在最佳条件下,RSC的累积H2S吸附能力从1.47 mg/g增加到22.83 mg/g (625 °C,20% RM,0.46 mmol/min蒸汽).
通过RM兴奋剂,在RSC表面引入了丰富的氧化铁,增强了H2S吸附.
吸附是通过物理吸附和化学吸附的联合机制进行的,可靠的可重复使用性 (>80%的容量在3个循环后).

结论:

红色泥改性污泥炭是一种有希望的,低成本的,可重复使用的吸附剂,用于H2S去除.
开发的方法有效地利用废物污泥和红泥进行环境修复.
这些发现支持RSC在气体净化和废物回收利用中的应用.

关键词:

H(2) S去除的方法微波炉热解微波炉热解微波炉热解微波炉微波炉微波炉微波炉微波炉微波炉微波炉微波炉微波炉微波炉微波炉微波炉微波炉微波炉微波炉微波炉微波炉微波炉微波炉微波炉红色的泥是红色的泥.响应表面的方法响应表面方法污泥充电污泥充电

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Preparation and Reactions of Thiols

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Thiols are prepared using the hydrosulfide anion as a nucleophile in a nucleophilic substitution reaction with alkyl halides. For instance, bromobutane reacts with sodium hydrosulfide to give butanethiol.

Preparation and Reactions of Sulfides

Preparation and Reactions of Sulfides

Sulfides are the sulfur analog of ethers, just as thiols are the sulfur analog of alcohol. Like ethers, sulfides also consist of two hydrocarbon groups bonded to the central sulfur atom. Depending upon the type of groups present, sulfides can be symmetrical or asymmetrical. Symmetrical sulfides can be prepared via an SN2 reaction between 2 equivalents of an alkyl halide and one equivalent of sodium sulfide.