Role of nano-magnetized Citrus X sinensis (orange) peels for decontamination of pendimethalin from aqueous resources: a comparative study of untreated and carbonaceous orange peels with nano-magnetized peels

AQUA — Water Infrastructure, Ecosystems and Society Pub Date : 2024-02-20 DOI:10.2166/aqua.2024.150

Shafaq Mubarak, Bilal Ashraf, Amina Asghar

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Abstract

Biosorption is a low-cost, environment friendly wastewater treatment method that involves a simple procedure for the removal of pesticides and their residues from wastewater. In the present investigation, untreated Citrus X sinensis peels (U-CXSP), activated carbon Citrus X sinensis peels (AC-CXSP) and nano-magnetized Citrus X sinensis peels (NM-CXSP) adsorbents were applied for the uptake of pendimethalin (PDM) from aqueous resources. The laboratory-prepared adsorbents were characterized using SEM, EDX, FTIR, VSM and XRD. Biosorption studies were carried out by varying different parameters, i.e., adsorbents dosage (0.1–0.5 g), time of contact (10–70 min), initial concentration of PDM (5–200 ppm), pH and temperature. The results showed that the removal efficiency of U-CXSP was increased from 97 to 114 mg/g for AC-CXSP adsorbent and increased from 97 to 111 mg/g for NM-CXSP adsorbent. Kinetics data obtained from this study well fitted with pseudo-second-order kinetic model. Adsorption isotherms were studied and the adsorption data well fitted with Langmuir and Freundlich models. Order of the adsorption efficiency is observed as follows: AC-CXSP > NM-CXSP > U-CXSP.

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经纳米磁化的中华橘（橘子）果皮在净化水资源中的虫螨威方面的作用：未经处理的橘子果皮和碳质橘子果皮与经纳米磁化的橘子果皮的比较研究

生物吸附是一种低成本、环境友好型废水处理方法，它采用简单的程序去除废水中的农药及其残留物。在本研究中，未经处理的中华柚果皮（U-CXSP）、活性炭中华柚果皮（AC-CXSP）和纳米磁化中华柚果皮（NM-CXSP）吸附剂被用于吸附水体中的戊唑醇（PDM）。使用 SEM、EDX、FTIR、VSM 和 XRD 对实验室制备的吸附剂进行了表征。通过改变不同的参数，即吸附剂用量（0.1-0.5 克）、接触时间（10-70 分钟）、PDM 初始浓度（5-200 ppm）、pH 值和温度，进行了生物吸附研究。结果表明，AC-CXSP 吸附剂对 U-CXSP 的去除率从 97 mg/g 提高到 114 mg/g，NM-CXSP 吸附剂则从 97 mg/g 提高到 111 mg/g。本研究获得的动力学数据与假二阶动力学模型十分吻合。对吸附等温线进行了研究，吸附数据与 Langmuir 和 Freundlich 模型十分吻合。吸附效率的顺序如下ac-cxsp > nm-cxsp > u-cxsp。

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AQUA — Water Infrastructure, Ecosystems and Society

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