从地下水中有效吸附Cu2+和Cd2+通过单一和二进制系统中的MgO改性污泥生物炭
Yan Wang1,2, Xianrong Meng2, Shanhu Wang1,2
1College of Environmental Science and Engineering, Suzhou University of Science and Technology, Suzhou, 215009, China.
Environmental science and pollution research international
|January 8, 2024
概括
用MgO改性污泥生物炭有效地从地下水中去除铜和等重金属. 这种吸附剂表现出高容量,良好的再生能力和对干扰的抗性,使其对净化水具有前景.
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:
- 地下水中的重金属污染对环境和健康构成重大风险.
- 传统的水处理方法可能是昂贵的,对于某些污染物来说效果不佳.
- 从污水污泥中提取的生物炭为废水整治提供了一种可持续的方法.
研究的目的:
- 评估用MGO修饰的污泥生物炭 (1MBC) 作为从地下水中去除Cu2+和Cd2+的吸附剂.
- 为了研究1MBC对重金属的吸附机制和动力学.
- 评估1MBC在单元和二元系统中的性能及其再生潜力.
主要方法:
- 用MGO改性污泥生物炭 (1MBC) 的制备和表征.
- 批量吸附实验用于研究初始度,pH值和共存离子的影响.
- 使用伪二阶模型分析吸附动力学,使用朗格穆尔模型分析等热量.
- 吸附机制的量化,包括离子交换,矿物沉和复杂化.
主要成果:
- 1MBC对Cu2+ (240.36 mg·g-1) 和Cd2+ (219.06 mg·g-1) 的理论最大吸附能力很高.
- 吸附遵循伪二阶动力学和兰格穆尔等温法,表明化学吸附是主要的机制.
- 离子交换和矿物沉是主要的去除机制.
- 1MBC在广泛的pH值范围内表现良好,对干扰物质的耐受性良好,在五个周期内具有出色的再生能力.
结论:
- 经MgO改性污泥生物炭是一种高效的吸附剂,可以从地下水中去除Cu2+和Cd2+.
- 吸附过程主要由化学吸附控制,离子交换和矿物沉起着关键作用.
- 由于其稳定性,再生潜力和在复杂的水矩阵中的有效性,1MBC证明了其实际适用性.
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