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通过不同富含的生物炭对Cd (II) 的吸附作用和机制

Yang Zeng¹, Yuhan Lin¹, Ming Ma^1,2,3

¹College of Resources and Environment, Southwest University, Chongqing, 400715, China.

Environmental science and pollution research international

|February 6, 2024

概括

这项研究探讨了从草和岩中使用改性生物碳来从水中去除 (Cd (II)). 用酸修饰的生物炭表现出增强的表面积和毛孔体积,显著提高了吸附能力.

科学领域:

环境化学环境化学
材料科学材料科学材料科学
可持续农业可持续农业

背景情况:

农业和林业废物利用是可持续发展的关键.
低级酸盐岩石的转化提供了高价值的应用.
从废物中生产生物炭可以产生有效的吸附剂.

研究的目的:

为了研究丰富生物炭 (PBC) 对于Cd (II) 的去除.
评估不同修饰对生物炭特性和吸附效率的影响.
阐明这些新型生物炭对Cd的吸附机制.

主要方法:

用化酸酸盐 (FMP),酸修饰的酸酸 (CA-FMP) 和单酸 (MCP) 浸和共火解米.
生物炭性质的表征,包括特定表面积 (SSA) 和毛孔体积.
批量吸附实验以确定Cd (II) 清除效率和吸附能力.
使用各种相互作用模型分析吸附机制.

主要成果:

CA-FMP和MCP均地加载到生物炭上,增加SSA和孔隙体积.
Cd(II) 吸附之后的单层化学吸收与粒子内部扩散.
机制包括离子交换,矿物沉,复合,阴离子-π相互作用,静电相互作用和物理吸附.
酸修饰 (CBC) 和MCP修饰 (MBC) 生物炭具有显著增强的Cd (II) 吸附能力 (分别为128.1和111.5毫克g-1).

结论:

修饰,特别是CA-FMP和MCP,提高了Cd (II) 除去的生物炭性能.
离子交换和矿物沉是主要的机制,取决于源.
这些改造的生物炭代表了重金属修复的有希望的可持续解决方案.

关键词:

吸附机制是一种吸附机制.农业和林业废弃物农业和林业废弃物是的组成部分.低质量的酸盐岩石和其衍生物.矿物沉量矿物沉量矿物沉量富含的生物炭是一种生物炭.

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