斑巴拉花生（Vigna subterranea（L.）Verdc.）壳废物的特性研究——一种用于不同生物基产品的潜在生物质。

Characterisation of Bambara groundnut (Vigna subterranea (L.) Verdc.) shell waste as a potential biomass for different bio-based products.

机构信息

Department of Mechanical, Energy and Industrial Engineering, Faculty of Engineering and Technology (FET), Botswana International University of Science and Technology (BIUST), Private Mail Bag 16, Palapye, Botswana.

Faculty of Engineering and Built Environment, University of Johannesburg, P.O Box 17011, Doornforntein, 2088, South Africa.

出版信息

Environ Monit Assess. 2024 Aug 3;196(9):777. doi: 10.1007/s10661-024-12937-z.

DOI:10.1007/s10661-024-12937-z

PMID:39095686

Abstract

Efforts are ongoing to utilise agricultural waste to achieve a full resource use approach. Bambara groundnut is an important crop widely grown in the sub-Saharan Africa with potential future importance because of its resilience to thrive under heightened weather uncertainty and widespread droughts that have challenged food security. After harvesting, the edible nuts are separated from the shells which are discarded as waste. Therefore, this research is aimed at characterising the chemical composition and the structural properties of Bambara groundnut shells (BGS) in view of their potential application as a biomass for different bio-products. The chemical composition of BGS was found to be 42.4% cellulose, 27.8% hemicellulose, 13% lignin and 16.8% extractives. Proximate analysis showed a high amount of volatile matter (69.1%) and low moisture (4.4%). XRD analysis confirmed crystallinity of cellulose I polymer and FTIR analysis observed functional groups of lignocellulosic compounds. Thermal stability, maximum degradation temperature and activation energy were found to be 178.5 °C, 305.7 °C and 49.4 kJ/mol, respectively. Compared to other nutshells, BGS were found to have a relatively high amount of cellulose and crystallinity that may result in biocomposites with improved mechanical properties.

摘要

人们正在努力利用农业废弃物来实现全面的资源利用方法。斑豆是一种在撒哈拉以南非洲广泛种植的重要作物，由于其在天气不确定性加剧和广泛干旱的情况下具有茁壮成长的弹性，因此具有潜在的未来重要性，这些情况对粮食安全构成了挑战。收获后，可食用的坚果从壳中分离出来，而壳则被丢弃为废物。因此，这项研究旨在从化学组成和结构特性方面对斑豆壳（BGS）进行表征，以期将其作为生物质应用于不同的生物产品。BGS 的化学成分被发现含有 42.4%的纤维素、27.8%的半纤维素、13%的木质素和 16.8%的提取物。初步分析显示，挥发物含量很高（69.1%），水分含量很低（4.4%）。XRD 分析证实了纤维素 I 聚合物的结晶度，FTIR 分析观察到木质纤维素化合物的官能团。热稳定性、最大降解温度和活化能分别为 178.5°C、305.7°C 和 49.4kJ/mol。与其他坚果壳相比，BGS 被发现具有相对较高的纤维素含量和结晶度，这可能导致具有改善机械性能的生物复合材料。