[1]黄瑶,臧园园,杨茜,等.天然低共熔溶剂对大米粉中重金属镉的去除效果及其机制[J].南京农业大学学报,2018,41(5):939-945.[doi:10.7685/jnau.201712026]
 HUANG Yao,ZANG Yuanyuan,YANG Xi,et al.Effects of natural deep eutectic solvents on removal of heavy metal cadmium from rice flour and its mechanism[J].Journal of Nanjing Agricultural University,2018,41(5):939-945.[doi:10.7685/jnau.201712026]
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天然低共熔溶剂对大米粉中重金属镉的去除效果及其机制()
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《南京农业大学学报》[ISSN:1000-2030/CN:32-1148/S]

卷:
41卷
期数:
2018年5期
页码:
939-945
栏目:
出版日期:
2018-09-20

文章信息/Info

Title:
Effects of natural deep eutectic solvents on removal of heavy metal cadmium from rice flour and its mechanism
作者:
黄瑶 臧园园 杨茜 陈志刚
南京农业大学食品科技学院, 江苏 南京 210095
Author(s):
HUANG Yao ZANG Yuanyuan YANG Xi CHEN Zhigang
College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
关键词:
天然低共熔溶剂重金属镉大米粉去除机制
Keywords:
natural deep eutectic solventsheavy metal cadmiumrice flourremovalmechanism
分类号:
S511
DOI:
10.7685/jnau.201712026
摘要:
[目的]本文旨在利用天然低共熔溶剂(NADES)高效去除大米粉中重金属镉,并对其机制进行探索。[方法]以加热法合成的15种NADES为洗脱剂,采用洗脱的方式,深入探讨NADES去除大米粉中重金属镉的效果及其机制,并以2种革兰氏阳性菌(金黄色葡萄球菌和单增李斯特菌)和2种革兰氏阴性菌(沙门氏菌和大肠杆菌)为指示菌,研究NADES的毒性。同时,通过吸附动力学和吸附热力学的方法研究NADES去除重金属镉的机制。[结果]15种NADES对大米粉中镉表现出较好的去除效果,镉去除率达到51%~96%。NADES毒性试验表明,除3种有机酸基质NADES由于其过低pH值对细菌生长造成影响之外,其余12种NADES表现出良好的生物相容性。初步去除机制试验表明,Freundlich等温吸附模型和拟二级动力学模型能很好阐明NADES的吸附机制。[结论]NADES是一种能高效去除大米粉中重金属镉的新型绿色溶剂。本研究建立了一种绿色高效去除镉污染大米粉中重金属镉的方法,为其他农产品重金属去除提供了思路。
Abstract:
[Objectives]The study aims to remove cadmium(Cd)from rice flour by natural deep eutectic solvents(NADES) with high efficiency and explore its mechanism.[Methods]15 NADES which were formed by three different base materials were synthesized and used as washing agents for Cd removing from contaminated rice flour. The effect and mechanism of Cd removing by NADES was explored in depth. Besides,the toxicities of the prepared NADES were qualitatively evaluated using two Gram-positive(Staphylococcus aureus and Listeria monocytogenes) and two Gram-negative(Escherichia coli and Salmonella enterica) bacteria. Meanwhile,the mechanism of Cd removal from rice flour by NADES was verified through adsorption kinetics and adsorption thermodynamics.[Results]Fifteen NAEDS demonstrated Cd removal(51% to 96%) from rice flour. Most of the NADES did not inhibit bacterial growth except organic acid-based NADES due to its low pH in toxicity study. Preliminary removal mechanism tests showed that Freundlich isotherm model and Pseudo-second-order adsorption kinetics could well elucidate the mechanism of the adsorption of NADES.[Conclusions]NADES is a new-type green solvent to remove heavy metal Cd efficiently from rice flour. Conclusively,this study presents a green and efficient way of removing Cd from contaminated rice and provides method for the other agricultural products.

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备注/Memo

备注/Memo:
收稿日期:2017-12-20。
基金项目:江苏省优势学科基金项目(080-80900233);教育部留学回国人员科研启动基金
作者简介:黄瑶,硕士研究生。
通信作者:陈志刚,教授,博士,研究方向为食品生物技术,E-mail:zgchen@njau.edu.cn。
更新日期/Last Update: 1900-01-01