从水溶液中生物吸附重金属,使用ZnO修饰的日期坑
Khalid Khazzal Hummadi1,2, Lin Zhu3, Songbo He4,5
1Joint International Research Laboratory of Circular Carbon, Nanjing Tech University, Nanjing, 211816, People's Republic of China. dr.khalid.hummadi@coeng.uobghdad.edu.iq.
Scientific reports
|December 20, 2023
概括
修改的日期坑 (MDP) 有效地吸附废水中的重金属,如铜,和. 这种废物衍生生物吸附剂的吸附能力明显高于以前的材料.
科学领域:
- 环境化学环境化学
- 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:
- 水溶液和工业废水中的重金属污染对环境和健康构成重大风险.
- 从废物中开发具有成本效益和效率的生物吸收剂对于可持续的重金属整治至关重要.
- 枣坑是一种易于获得的农业废物,显示出作为生物吸收剂开发前体的潜力.
研究的目的:
- 使用ZnO修饰日期坑 (MDP) 调查铜 (Cu2+), (Ni2+) 和 (Zn2+) 的生物吸附.
- 描述MDP生物吸附剂并优化重金属去除的关键参数.
- 分析生物吸附过程的吸附同热量,动力学和热力学.
主要方法:
- 使用FT-IR,SEM,BET和XRD合成和描述ZnO修饰的日期坑 (MDP).
- 选和优化生物吸附参数:pH,颗粒大小,速度,初始金属度,MDP剂量,接触时间和温度.
- 实验数据的建模使用朗格穆尔和弗洛因德利希的等温模型,以及伪一阶,伪二阶和粒子内部扩散动力模型.
主要成果:
- 对于Cu2+ (82.4毫克-1),Ni2+ (71.9毫克-1) 和Zn2+ (66.3毫克-1),MDP显著增强了吸附能力,超过了以前的时间坑吸附剂四倍以上.
- 发现生物吸附过程是自发的和外热的,由化学吸附驱动到MDP表面的同质和异质部位.
- 吸附数据最适合伪二阶动力学和兰迈尔异热模型,表明化学吸附是限制速度的步骤.
结论:
- 用ZnO修饰的日期坑是一种高效,低成本和可持续的生物吸收剂,用于从水溶液和工业废水中去除重金属.
- 修改协议显著提高了日期坑废物的生物吸附性能.
- 这项研究强调了一种有希望的方法,用于将农业废物用于环境修复应用.
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