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在水溶液中,Cu (II) 和Zn (II) 通过改性竹木木炭吸附

Huiyan Ma¹, Wen Xu¹, Ping Wang²

¹College of Ecology and Environment, Nanjing Forestry University, Nanjing, 210037, People's Republic of China.

Environmental geochemistry and health

|May 2, 2024

概括

改性竹炭有效地从废水中去除铜和等重金属. KMnO4和NaOH的修饰增强了吸附能力,为净化水提供了一个有希望的环保解决方案.

科学领域:

环境科学环境科学
材料科学材料科学材料科学
水处理处理水的方法

背景情况:

工业活动会将重金属 (2+,2+) 释放到水体中,降低水质.
传统的吸附剂往往会带来环境风险.
竹木炭是一种环保的替代吸附材料.

研究的目的:

为了研究改性竹炭在去除重金属方面的有效性.
为了比较KMnO₄修饰 (KBC) 和NaOH修饰 (NBC) 竹木炭与原始竹木炭 (WBC) 的吸附性能.
了解pH值和修改对吸附机制的影响.

主要方法:

纯竹木炭 (WBC) 用不同度的KMnO₄和NaOH进行了修改,以产生KBC和NBC.
进行了吸附实验,以评估不同pH条件下的Cu2+和Zn2+的去除.
能量分散式X射线光谱 (EDS) 用于分析表面成分变化.

主要成果:

通过WBC,KBC和NBC对Cu²⁺吸附的最佳pH被确定为5.0.
Zn²⁺吸附对溶液pH的敏感性较小.
EDS分析显示,K6 (0.06 mol/L KMnO₄) 上的Mn-O组和N6 (6 mol/L NaOH) 表面的氧/碳基组增加,与 Cu²⁺和 Zn²⁺ 增强的吸附相关.
表面和孔隙扩散机制共同控制两种金属的吸附率.

结论:

KMnO和NaOH的修饰显著提高了竹炭吸附Cu2+和Zn2+的能力.
改性竹炭 (KBC和NBC) 有效地降低了重金属度低于监管限制.
KBC和NBC是有希望的,环保的吸附剂,用于废水中的重金属整治.

关键词:

吸附方式吸附方式吸附方式竹木木炭是一种木炭.重金属是一种重金属.修改修改修改是一个氧化处理是一种氧化处理.减少治疗是减少治疗的方法.

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