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利用热解辅助棕榈科植物花序有效去除水环境污染有毒污染物的建模分析。

Modeling analysis on the effective elimination of toxic pollutant from aquatic environment using pyrolysis assisted palmyra palm male inflorescence.

机构信息

Department of Biotechnology, Rajalakshmi Engineering College, Chennai, India.

Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Chennai, India.

出版信息

Environ Res. 2021 Jun;197:111146. doi: 10.1016/j.envres.2021.111146. Epub 2021 Apr 16.

Abstract

In this study adsorption of Cd(II) ions using the pyrolysis assisted Palmyra palm male inflorescence (PAPMI) was systematically examined. A batch adsorption study was carried out to determine the type of interactions and removal efficiency which is based on the surface property of PAPMI. The diverse parameters which affect the adsorption performance of PAPMI for Cd(II) ion removal were optimized: biosorbent dose - 1.25 g/L, pH - 6.0, temperature - 303 K, initial cadmium ions concentration - 50 mg/L and contact time - 40 min. Pseudo-first order kinetics and Langmuir isotherm models were more suitable to describe the adsorption kinetics and isotherm, respectively. Therefore, modeling studies portrayed the present Cd(II) ions adsorption on PAPMI as monolayer adsorption occurs on the homogeneous surface and follows the physisorption mechanism. The maximum adsorption capacity of the synthesized PAPMI was examined as 233.2 mg/g from the equilibrium isotherm investigation. Based on the calculated thermodynamic parameters (ΔG, ΔH and ΔS) values, the present Cd(II) ions adsorption on PAPMI was explicated as feasible, and exothermic. The outcome proposed that Palmyra palm male inflorescence can be a suitable adsorbent for expulsion of Cd(II) ions from aqueous environment. In the interim, the utilization of pyrolysis assisted is a viable and fast uptake innovation for the removal of heavy metals from water environment.

摘要

本研究系统考察了热解辅助海枣雄花序(PAPMI)对 Cd(II)离子的吸附作用。进行了批吸附研究,以确定基于 PAPMI 表面特性的相互作用类型和去除效率。优化了影响 PAPMI 去除 Cd(II)离子吸附性能的多种参数:生物吸附剂剂量-1.25 g/L、pH 值-6.0、温度-303 K、初始镉离子浓度-50 mg/L 和接触时间-40 min。准一级动力学和 Langmuir 等温线模型更适合描述吸附动力学和等温线,分别。因此,模型研究表明,目前 Cd(II)离子在 PAPMI 上的吸附是单层吸附发生在均匀表面上,并遵循物理吸附机制。通过平衡等温线研究,考察了合成的 PAPMI 的最大吸附容量为 233.2 mg/g。根据计算得到的热力学参数(ΔG、ΔH 和 ΔS)值,表明目前 Cd(II)离子在 PAPMI 上的吸附是可行的,并且是放热的。结果表明,海枣雄花序可以作为一种合适的吸附剂,用于从水环境中去除 Cd(II)离子。同时,热解辅助的利用是一种可行且快速的从水环境中去除重金属的吸收创新。

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