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热解温度和修改方法对水皮衍生的生物炭特性和重金属吸附的影响

Zhaoqin Huang¹, Qin Wang², Yufeng Zhang²

¹College of Environmental Ecology, Jiangsu Open University, Nanjing 210017, China.

Molecules (Basel, Switzerland)

|September 13, 2025

概括

用氧化物 (KOH) 修改的米生物炭有效地从水中去除重金属 (Cd) 和 (Pb). KOH的修改显著增强了生物炭.

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:

水中的重金属污染对环境和健康构成重大风险.
从农业废物中提取的生物炭提供了一个可持续的吸附材料.
优化生物炭特性对于有效去除重金属至关重要.

研究的目的:

为了研究热解温度和化学修饰对大米皮生物炭特性的影响.
为了评估修改生物炭对 (Cd(II)) 和 (Pb(II)) 除去的吸附能力.
为了确定增强重金属吸附的最佳修改策略.

主要方法:

米生物炭是在300,400和500°C的热解温度下制备的.
生物炭使用酸 (HNO3) 和氧化 (KOH) 进行了修改.
物理化学性质和重金属吸附能力 (Cd (II),Pb (II)) 的特征.

主要成果:

热解温度的提高提高了生物炭的特定表面积和孔积.
HNO3和KOH的修改显著改变了表面功能组,并改善了吸附.
用KOH修饰的生物炭 (KOH-BC300) 显示了最高的吸附能力:Cd (II) 的72.14 mg·g-1和Pb (II) 的170.84 mg·g-1 .

结论:

KOH修饰比HNO3修饰更有效地增强重金属吸附在米生物炭上的重金属吸附.
含有氧的功能组在提高吸附性能方面,比特定表面积发挥更为关键的作用.
经KOH改性大米生物炭是一种有前途的吸附剂,用于废水处理和重金属整治.

关键词:

在Cd (II) 中使用.在Pb (II) 中.吸附吸附是一种吸附.生物炭是一种生物炭.修改的意思是改变的意思.

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