Sustainable remediation of nickel (II) in aqueous solutions using waste orange peel biomass as a bioadsorbent

IF 2.2 4区化学 Q2 Engineering

Chemical Papers Pub Date : 2024-10-12 DOI:10.1007/s11696-024-03726-6

Yasemin İşlek Coşkun, Rabia Nur Ün

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Abstract

A low-cost adsorbent for Ni(II) uptake was developed using orange peel waste after pretreatment with ethanol/water at 40 °C for 6 h. Various experimental factors such as pH, adsorbent dosage, and contact time were investigated, with optimal conditions determined to be pH 5, an orange peel dose of 2.5 g/L, and a contact time of 90 min. The characterization of the adsorbent was analyzed. The linear and nonlinear isotherm and kinetic models were investigated. The Langmuir model suggested chemisorption with a 19.42 mg/g capacity, following pseudo-second-order kinetics. The thermodynamic analysis revealed that the uptake was exothermic (ΔH° < 0), feasible, and spontaneous (ΔG° < 0). Regeneration studies (NaCl, NaOH, HCl, HNO₃), interference studies (Al³⁺, Cd²⁺, Ca²⁺, Na⁺, mixed solution), and application studies with real water samples (wastewater, drainage water, tap water, bottled water) were also conducted. A possible uptake mechanism was suggested. Utilizing ethanol/water-pretreated orange peels (EOP) addresses organic biomass waste disposal and offers a cost-effective, readily available solution for heavy metal removal.

Graphical Abstract

Abstract Image

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利用废橘皮生物质作为生物吸附剂对水溶液中的镍（II）进行可持续修复

研究了 pH 值、吸附剂用量和接触时间等多种实验因素，确定最佳条件为 pH 值为 5、橘皮用量为 2.5 g/L、接触时间为 90 分钟。分析了吸附剂的特性。研究了线性和非线性等温线和动力学模型。朗缪尔模型表明，化学吸附能力为 19.42 毫克/克，遵循假二阶动力学。热力学分析表明，吸收是放热（ΔH° <0）、可行和自发的（ΔG° <0）。此外，还进行了再生研究（NaCl、NaOH、HCl、HNO3）、干扰研究（Al3+、Cd2+、Ca2+、Na+、混合溶液）以及实际水样（废水、排水、自来水、瓶装水）的应用研究。研究提出了一种可能的吸收机制。利用乙醇/水处理过的橘子皮（EOP）可以解决有机生物质废物的处理问题，并为去除重金属提供了一种具有成本效益且随时可用的解决方案。图表摘要

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来源期刊

Chemical Papers Chemical Engineering-General Chemical Engineering

CiteScore

3.30

自引率

4.50%

发文量

590

期刊介绍： Chemical Papers is a peer-reviewed, international journal devoted to basic and applied chemical research. It has a broad scope covering the chemical sciences, but favors interdisciplinary research and studies that bring chemistry together with other disciplines.