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]





Effects of natural deep eutectic solvents on removal of heavy metal cadmium from rice flour and its mechanism
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
HUANG Yao ZANG Yuanyuan YANG Xi CHEN Zhigang
College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, China
natural deep eutectic solventsheavy metal cadmiumrice flourremovalmechanism
[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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更新日期/Last Update: 1900-01-01