烧焦甘包的特点及其从水溶液中吸附的能力
Kaito Yamashiro1,2, Ryo Miyamoto2, Fumihiko Ogata2
1Department of Environmental Health, School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, 1432-1 Horinouchi, Hachioji, Tokyo, 192-0392, Japan.
Chemical & pharmaceutical bulletin
|September 7, 2025
概括
在较高温度下烧焦的甘包油有效吸附. 这种吸附是由包的特定表面积和酸性表面功能组增强的,使其成为一个有希望的材料去除.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 化学 化学 化学
背景情况:
- (Cd) 污染对环境和健康构成重大风险.
- 甘包 (BG) 是一个丰富的农业废物,有可能用于整治应用.
- 了解改性BG的吸附特性对于开发有效的Cd去除策略至关重要.
研究的目的:
- 为了研究烧温度对甘包的吸附能力的影响.
- 为了确定表面特性 (pHpzc,SSA,SFGs) 和Cd吸附之间的关系.
- 为了阐明控制Cd吸附在烧焦的甘包上的机制.
主要方法:
- 甘包在200°C至1000°C的温度下被烧焦.
- 在一系列的pH值中进行了吸附实验.
- 分析了包括零电荷点 (pHpzc),特定表面积 (SSA) 和酸性表面功能组 (SFG) 在内的表面特性.
- 部分相关性分析用于评估不同表面特性对Cd吸附的贡献.
主要成果:
- 烧焦包油的零电荷点 (pHpzc) 从4.3到6.5不等.
- 最佳Cd吸附发生在pH4-8时,这表明了表面负电荷和Cd (II) 离子的重要性.
- 特定表面积 (SSA) 和吸附的Cd量都随着化温度的提高而增加.
- 发现酸性表面功能群 (SFG) 与Cd吸附有显著的相关性,独立于SSA.
结论:
- 化显著提高了甘包的吸附能力.
- 增加的特定表面积和酸性表面功能组的存在都有助于改善吸附.
- 烧焦的甘包油显示出作为有效吸附剂的潜力,用于从污染水中去除.
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