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Chitosan과 Chitosan유도체 및 Polyacrylamide 금속흡착 제거 성능의 비교
조훈형,김용범 서울산업대학교 산업대학원 1992 大學院論文集 Vol.1 No.1
여러가지 금속이온을 혼합하여 대조용액(reference solution)으로 조제하고, 천연 양이온성 고분자인 chitosan과 chitosan에 역시 양이온성 monomer인 acrylamide를 그라프트 공중합한 유도체와 합성양이온 고분자인 polyacrylamide로 금속흡착제거 실험을 하고 여기서 구한 최적조건을 바탕으로 현장의 도금 조합폐수에 적용하여 chitosan 과 chitosan의 유도체로 조제한 응집제의 획기적인 성능을 확인하였다. 이들 chitosan계 응집제들은 6가 크롬을 제외한 거의 대부분의 금속들에 대해 20~30ppm 정도의 투입량으로 90~100%의 흡착제거율을 보이고 있다. 시중 대표적인 양이온 합성고분다 응집제인 polyacrylamide에 비해 투입량과 제거효율을 고려할때 약 15배 내외의 성능이 있음이 확인되었다. 산업현장에 적용하는 경우 투입약품비와 처리공정 절감으로 획기적인 경제적 이익을 가져올 것으로 기대된다. The authors examined metal take-up abilities of flocculants, chitosan(Cs), chitosan grafted with acrylamide(CsAm)and Polyracrylamide(PAm) with an artificially prepared reference solution of mixture of various metal ions and totally collected wastewater of the various metal plating works placed in the industrial complex. In the case of examinations with the reference solution, Cs and CsAm demonstrated their excellences in taking up of almost all of the metal ions with smaller dosages whilest PAm showed its poorness at their appropriate pH values of the reference solution, PAm is the most frequently in industry, but it was found that it was out of competition with the chitinous flocculants(chitosan and chitosan graft-copolymerized chitosan) in taking up metal ions. -------------------------------------------------------------------------------- Flocculants Cs CsAm PAm -------------------------------------------------------------------------------- Pollutants and Metal Dosage Take-up rates Dosage Take-up rates Dosage Take-up rates -------------------------------------------------------------------------------- COD 40 76 20 81 80 61 -------------------------------------------------------------------------------- SS 20 90 20 94 80 80 -------------------------------------------------------------------------------- Tr 20 99 30 100 140 79 -------------------------------------------------------------------------------- Al 20 82 20 91 100 22 -------------------------------------------------------------------------------- Ca 40 94 20 85 60 23 -------------------------------------------------------------------------------- Cr 20 28 20 33 60 20 -------------------------------------------------------------------------------- Cu 15 85 15 80 100 24 -------------------------------------------------------------------------------- Fe 20 97 20 96 80 43 -------------------------------------------------------------------------------- Ni 20 93 20 93 80 23 -------------------------------------------------------------------------------- Judging from the results mentioned above, the treatment of metal plating wastewater with chitosan or its derivatives is expected to be one of the most innovative and economical ways for removal of maleficent heavy metals, purification and recycling of the wastewater, and is quite worthy of recommendation to industry.
정병욱,박제권,조훈형,김용범,강대인 서울産業大學校 1992 논문집 Vol.35 No.1
The methods of preparation of carboxymethyl chitin (CM-chitin) and carboxymethyl chitosan (CM-chitosan) were studied and measured in the most economical and productive ways in the laboratory and opened a way of commercial production for industry with cooperation of the Hanam Trading Co. Ltd. The authors extracted chitin first from crab shell through decarbonation and then chitosan was prepared through deacetylation of chitin. CM-chitin and CM-chitosan were prepared by the Williamson's ether synthesis process through which alkaline chitin/chitosan and monochloroacetic acid were interreacted. The products were identified through the IR spectru, checks. The yields of CM-chitosan are applied to medicals, medical matrials, cosmetics and many other fields of state of the arts. Fortunately Korea is available of rich waste crab shells and expected to be one of chitin/chitosan development countries.