Authors: Kenichi Hatano Kazuki Kanazawa Hiroki Tomura Takeshi Yamatsu Kinichi Tsunoda Kenji Kubota
Publish Date: 2016/05/30
Volume: 23, Issue: 17, Pages: 17656-17663
Abstract
Phytoextraction has been proposed as an alternative remediation technology for heavy metal contamination and it is well known that chelators may alter the toxicity of heavy metals and the bioavailability in plants Our previous work demonstrated that an adsorbentcolumn chromatography can effectively separate melanoidinlike product MLP from sugarcane molasses The aim of this study was to examine the chelating property of MLP and to evaluate the facilitatory influence on the phytoextraction efficiency of Japanese radish The result showed that MLP binds to all the metal ions examined and the binding capacity of MLP toward Cu2+ seems to be the highest among them The metal detoxification by MLP followed the order of Pb2+ Zn2+ Ni2+ Cu2+ Fe2+ Cd2+ Co2+ Furthermore in the phytoextraction experiment using copper sulfate the application of MLP accelerated the detoxification of copper and the bioavailability in radish sprouts Thus these results suggest that MLP possesses the potential for an accelerator of phytoextraction in the coppercontaminated mediaThe authors are thankful to Mr Tetsuo Akaishi Mr Daiki Nakajima and Miss Miyu Ooi Gunma University for their help in the experiments of metal binding capacity and phytoextraction respectively The authors are also grateful to Mr Osamu Fukushima Murakami Farm Co Ltd for giving Japanese radish seeds Financial supports for this research were provided by Fuji Nihon Seito Corporation Japan Science and Technology Agency JST
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