Comparative study of pb(II) and cr(VI) removal using Cassava peel (Manihot Esculenta Crantz).

IF 3.4 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

International Journal of Phytoremediation Pub Date : 2024-11-01 Epub Date: 2024-07-03 DOI:10.1080/15226514.2024.2372851

Rahmiana Zein, Deswati Deswati, Syiffa Fauzia, Nanda Farel Pisya

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引用次数: 0

Abstract

The present study investigated the capability of cassava peel (Manihot Esculenta Crantz) in Pb(II) and Cr(VI) removal. The comparative study was conducted using batch method observing some parameters. The results indicated that the optimum adsorption of Pb(II) occurred at pH 5, initial concentration of 1000 mg/L, and contact time of 50 min. On the other hand, the optimal adsorption of Cr(VI) was achieved at pH 2, initial concentration of 1200 mg/L, and contact time of 70 min. The adsorption isotherms of both metals tended to follow the Langmuir model, while the adsorption kinetics suited to pseudo-second-order model. Thermodynamic parameters indicated that the adsorption process was spontaneous (ΔG° negative), endothermic (ΔH° positive), and exhibited surface dispersion on the biosorbent (ΔS° positive). Characterization using Fourier Transform Infrared (FTIR), X-Ray Fluorescence (XRF), Scanning Electron Microscopy (SEM), and Thermogravimetry (TGA) provided evidence of both physical and chemical adsorption. The adsorption capacity of cassava peel was also tested on samples collected approximately 30 m from the bay shoreline, resulting in a removal percentage of 94.67% for Pb(II) and 82.28% for Cr(VI) under optimal pH and contact time conditions.

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利用木薯皮（Manihot Esculenta Crantz）去除铅（II）和铬（VI）的比较研究。

本研究调查了木薯皮（Manihot Esculenta Crantz）去除铅（II）和铬（VI）的能力。比较研究采用批量法，观察了一些参数。结果表明，在 pH 值为 5、初始浓度为 1000 毫克/升、接触时间为 50 分钟时，对铅（II）的吸附效果最佳。另一方面，在 pH 值为 2、初始浓度为 1200 毫克/升、接触时间为 70 分钟时，对 Cr(VI) 的吸附效果最佳。这两种金属的吸附等温线都趋向于遵循 Langmuir 模型，而吸附动力学则适合伪二阶模型。热力学参数表明，吸附过程是自发的（ΔG° 为负值）、内热的（ΔH° 为正值），并在生物吸附剂上表现出表面分散（ΔS° 为正值）。利用傅立叶变换红外（FTIR）、X 射线荧光（XRF）、扫描电子显微镜（SEM）和热重分析（TGA）进行的表征提供了物理和化学吸附的证据。木薯皮的吸附能力也在距离海湾海岸线约 30 米处采集的样品上进行了测试，结果表明，在最佳 pH 值和接触时间条件下，木薯皮对铅（II）的去除率为 94.67%，对铬（VI）的去除率为 82.28%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Phytoremediation 环境科学-环境科学

CiteScore

7.60

自引率

5.40%

发文量

145

审稿时长

3.4 months

期刊介绍： The International Journal of Phytoremediation (IJP) is the first journal devoted to the publication of laboratory and field research describing the use of plant systems to solve environmental problems by enabling the remediation of soil, water, and air quality and by restoring ecosystem services in managed landscapes. Traditional phytoremediation has largely focused on soil and groundwater clean-up of hazardous contaminants. Phytotechnology expands this umbrella to include many of the natural resource management challenges we face in cities, on farms, and other landscapes more integrated with daily public activities. Wetlands that treat wastewater, rain gardens that treat stormwater, poplar tree plantings that contain pollutants, urban tree canopies that treat air pollution, and specialized plants that treat decommissioned mine sites are just a few examples of phytotechnologies.