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Sekine, Yurina; Nankawa, Takuya
Chem-Station (Internet), 1 Pages, 2021/03
We will explain the experimental results and the background of the research that developed a highly efficient toxic metal adsorbent using wastebone as a raw material.
Seko, Noriaki; Tamada, Masao; Yoshii, Fumio
Nuclear Instruments and Methods in Physics Research B, 236(1-4), p.21 - 29, 2005/07
Times Cited Count：104 Percentile：98.74(Instruments & Instrumentation)Removal of toxic metals from streaming water and ground water is important task to preserve environment. Radiation processings of grafting and crosslinking can synthesis adsorbent having high performances. Graft adsorbent can be synthesized by using the conventional polymer like polyethylene having variety shapes such as membrane, cloth, and fiber. Especially, the obtained fibrous adsorbent has 100 times higher rate of adsorption than that of commercialized resin. Novel fibrous adsorption for arsenic was synthesized by direct grafting of phosphoric monomer and following zirconium-loading. Fibrous adsorbents of amidoxime and iminodiacetate were applied to the removal of cadmium from the scallop waste. Furthermore, the amidoxime adsorbent is useful to recover rare metal such as uranium and vanadium in seawater. Crosslinked natural polymers like chitin-chitosan in the paste-like state are applicable for the metal adsorbent. This adsorbent can be biodegraded after usage.
Nakai, Hisaaki*; Seko, Noriaki; Tamada, Masao; Temma, Tsuyoshi*; Oguma, Masaomi*
Nihon Ion Kokan Gakkai-Shi, 15(1), p.10 - 15, 2004/01
Removal of cadmium from the boiled mid-gut gland of the scallop was investigated to utilize the waste of scallop processing for the fertilizer and the livestock feed. Twelve kinds of acid solutions (0.1M) were evaluated on the point of the cadmium elution, toxicity, and price. The selected malic acid could wash out cadmium less than 0.5ppm in the boiled mid-gut gland by optimizing the acid concentration and the repitaion of rinse. It was confirmed that the concentration of the eluted cadmium was reduced to 0.1ppm and less than by the iminodiacetic acid adsorbent synthesized with radiation-induced graftpolymerization.
Tamada, Masao
Oyo Butsuri, 72(4), p.453 - 456, 2003/04
Radiation induced graft-polymerization is sophisticated technique which is capable of introducing aiming functions into conventional polymers. Especially, pre-irradiation method is available for industrialization owing to discrete processes of irradiation and grafting. The chelate adsorbents having high selectivity against metals were synthesized by the graft-polymerization. The recovery of uranium from seawater and the removal of toxic metals from wastewater were described as applicable examples of the graft adsorbents.
Tamada, Masao
Hoshasen To Sangyo, (93), p.17 - 21, 2002/03
Radiation induced graft polymerization is useful technique for introducing aiming function into conventional polymers. Especially, preirradiation method can easily control the graft yield by irradiation dose and polymerization time. In this method, storing the irradiated polymer at low temperature is capable of grafting at discrete facility, which is merit for industrialization. Removal of toxic metals with grafted polymer needs the functions of ion exchange and chelating reaction. Graft polymerization is superior method to introduce such functions into the polymer. The fibrous adsorbent for lead ion, prepared by grafting, shows the high performance to the particle adsorbent.
Taniguchi, Takumi
no journal, ,
no abstracts in English
