METHOD FOR REMOVING HEAVY METAL FROM PLANT BIOMASS

PROBLEM TO BE SOLVED: To provide an effective technique of using high-cadmium containing biomass that is harvested after soil purification by phytoremediation techniques.SOLUTION: After cadmium contained in plant biomass is dissolved into a solution by addition of sulfuric acid or hydrochloric acid...

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Bibliographische Detailangaben
Hauptverfasser:	YOKOYAMA SAKI, HATTORI HIROYUKI, SHINDO AKIRA, RAI YASUKI
Format:	Patent
Sprache:	eng ; jpn
Schlagworte:	ADHESIVES CHEMISTRY DISPOSAL OF SOLID WASTE DYES MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PERFORMING OPERATIONS POLISHES RECLAMATION OF CONTAMINATED SOIL RECLAMATION OF CONTAMINED SOIL SOIL TRANSPORTING TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an effective technique of using high-cadmium containing biomass that is harvested after soil purification by phytoremediation techniques.SOLUTION: After cadmium contained in plant biomass is dissolved into a solution by addition of sulfuric acid or hydrochloric acid to the plant biomass (rice straws, leaf vegetable and root vegetables) containing the high amount of heavy metal, cadmium in particular, dithiocarbamic acid compound and/or liquid chelate resin is added thereto to fix and precipitate the cadmium in an acid solution, and then the cadmium in the plant biomass is removed to produce a useful cadmium-free biomass resource. 【課題】ファイトレメディエーション技術による土壌浄化後に収穫されるカドミウム高含有バイオマスの有効な利用技術を提供する。【解決手段】重金属、特にカドミウムを高度に含む植物バイオマス（稲わら、葉菜、根菜類）に硫酸あるいは塩酸を添加することにより、植物バイオマス中のカドミウムを溶液中に溶解させた後に、ジチオカルバミン酸化合物およびまたは液体キレート樹脂を添加して、酸溶液中のカドミウムを固定、沈殿させ、植物バイオマス中のカドミウムを除去することにより、カドミウムフリーの有用なバイオマス資源を生産する。【選択図】なし