农业废弃物的价值利用 - 新型 Areca catechu L. 残留物与 PVA-Chitosan 混合用于去除水中的铬 (VI) - 表征、动力学和等温线研究

IF 5.6 1区农林科学 Q1 AGRICULTURAL ENGINEERING

Industrial Crops and Products Pub Date : 2024-11-16 DOI:10.1016/j.indcrop.2024.120013

Jasmine Jose , CJ Binish , Jobish Johns , Sony J. Chundattu , AV Vijayasankar

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引用次数: 0

摘要

油甘果是一种盛产于热带地区（如印度、斯里兰卡和东南亚部分地区）的工业作物，在加工过程中会产生大量农业废弃物。本研究探索了一种变废为宝的方法，即通过环保型连续搅拌法将油甘籽有机残渣加入聚乙烯醇（PVA）-壳聚糖混合物中，以开发一种用于去除水中铬（VI）的吸附膜。形态分析表明，混合薄膜的表面积、孔隙率和粗糙度都有所提高。X 射线衍射和傅立叶变换红外分析表明，PVA 和壳聚糖具有半结晶性质，其特征峰强度有所下降，这证实了添加了坚果残渣。最佳条件确定了 OR-4 薄膜，使用 0.4 克吸附剂，在 pH 值为 9.0、温度为 40°C 的条件下，45 分钟内对 173 毫克/升铬（VI）的去除率达到 88.68%。SEM 图像显示，吸附前后表面粗糙度明显降低，证实了铬的吸附作用。动力学研究揭示了一个伪二阶模型，吸附等温线证实了薄膜表面的异质性。这项研究推动了用于水净化的环保材料的发展，并为管理农业残留物提供了一种可持续的解决方案。

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Agricultural waste valorisation – Novel Areca catechu L. residue blended with PVA-Chitosan for removal of chromium (VI) from water – Characterization, kinetics, and isotherm studies

Arecanut, an industrial crop prevalent in tropical regions such as India, Sri Lanka, and parts of Southeast Asia, generates significant agricultural waste during processing. This study explores a waste-to-wealth approach by incorporating arecanut organic residue into Polyvinyl alcohol (PVA) - Chitosan blends via an eco-friendly continuous stirring method to develop an adsorbent film for removing chromium (VI) from water. Morphological analyses confirmed enhanced surface area, porosity, and roughness in the blended films. XRD and FTIR analyses indicated a semi-crystalline nature with a decrease in the characteristic peak intensity of PVA and chitosan, confirming the incorporation of arecanut residue. Optimal conditions identified OR-4 film, using 0.4 g of adsorbent, achieving 88.68 % removal of 173 mg/L chromium (VI) at pH 9.0, within 45 minutes at 40°C. SEM images demonstrated significant surface roughness reduction before and after adsorption, confirming chromium adsorption. Kinetic studies revealed a pseudo-second-order model and adsorption isotherms confirmed film surface heterogeneity. This research advances eco-friendly materials for water purification and offers a sustainable solution for managing agricultural residues.

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来源期刊

Industrial Crops and Products 农林科学-农业工程

CiteScore

9.50

自引率

8.50%

发文量

1518

审稿时长

43 days

期刊介绍： Industrial Crops and Products is an International Journal publishing academic and industrial research on industrial (defined as non-food/non-feed) crops and products. Papers concern both crop-oriented and bio-based materials from crops-oriented research, and should be of interest to an international audience, hypothesis driven, and where comparisons are made statistics performed.