이온성 고분자에 비이온성 고분자를 섞어 이온 함량을 조절함으로써 다양한 전하량을 갖는 이온성 막을 제조하였다. 비이온성 고분자로는 폴리비닐알콜, 음이온성 고분자로는 알긴산 나트륨, 양이온성 고분자로는 키토산을 사용하였으며, 이들 이온성 고분자막을 사용하여 여러 전해질 수용액에 대한 투과 및 분리특성을 관찰하였다. 막 내부에 이온성 고분자 함량이 많을수록 친수성 특성을 보였으며, 순수투과 및 용액투과 속도가 증가함을 관찰할 수 있었고, 또한 투과속도는 막의 팽윤 거동에 의해 결정됨을 확인할 수 있었다. 용질 배제율의 경우는 막과 투과용질간의 정전기적 인력, 즉 Donnan exclusion에 의해 결정이 되며, 정전기적 인력이 비슷한 경우는 분자체 효과에 의해 분리됨이 관찰되었다.

토양 유기물에서 생물학적 난분해성인 부식물질을 알카리에서 추출하고 산성영역에서 침전되는 성분인 부식산을 정제, 추출하였다. 부식산의 주성분인 카르복실기가 이온교환 능력을 가지고 있는 것을 이용하여 PVA와의 불균질한 이온교환막을 제조하여 생리활성 이온인 K+, Na＋의 이동 및 이동속도를 검토하여 보았다. 그 결과 수소이온 농도가 높을수록 이동속도는 빠르게 나타나고, 특히 10-1,100영역에서 급격한 변화를 보였다. 또한 K+, Na＋의 농도가 증가함에 따라 그 선택성이 나타났으며, 특히 수소이온농도 100 일때는K+이 2배정도 빠르게 이동되고 있다. 따라서 이러한 생리활성 이온의 선택성 및 이동속도의 향상으로 부식산이 이온교환막의 새로운 재료로서의 그 가능성을 나타내었다.

ZnSo4ㆍ7H2O에 의한 모델폐수에서 Zn 농도 및 pH를 변화하여 역삼투 실험하였고, Zn용액의 pH에 따라 아연의 제거율은 상당히 변화하였고, pH 3.0~11.5 범위에서 실험한 바 pH 8.3일 때가 아연제거율은 99.9% 이상, 투과 속도는 1.49 × 10-3cm/sec로 가장 큰 값을 보였다. 아연모델폐수에 Cyanide를 아연농도와 동량으로 첨가하였을 때, 아연은 99%, Cyanide는 93% 정도 제거가 가능하였다. 또한 첨가제로 음이온계면활성제 등을 첨가하여 실험한 결과, Membrane에서의 투과속도가 0.76 × 10-3cm/sec로 현저히 감소하였다.

Functionalized organic polymers have been used as supports for heterogenized homogeneous catalytic process[1]. Sprcific advantages of using these resins as support reagents have been reviewed[2-4]. These include: -ease of by-product separation from the main reaction product usuallyby simple filtration. -prevention of intermolecular reaction of reactive species or functional groups by simulating high dilution conditions[5]. -utility of the "fish-hook" principle in which a minor component in fished out of a large excess substrate by the insoluble polymer[6]. -the possibility of reusing recovered reagents as well as eliminating the use of volatile or noxious substances[7]. Catalysis by ion-exchange membranes is perhaps one of the latest examples of the use of a polymer-supported species. Conceptually, catalysts on membrane supports offer several possible advantages over traditional powder type systems. They are: (1) Membranes immobilize the catalyst, preventing agglomeration. (2) Filtration is unnecessary for the catalyst separation and so complete catalyst recovery is facilitated. (3) Catalytyic and separation processes can be combined, allowing membrane supported catalysts for the continous flow reactors. reactors.

Hydrochloride acid salts of new N2O2 tetradentate ligands containing amine and phenol N,N'-bis(2-hydroxybenzyl)-o-phenylenediamine(H-BHP), N,N'-bis(5-bromo-2-hydroxybenzyl)-o-phenylenediamine(Br-BHP), N,N'-bis (5-chloro-2-hydroxybenzyl)-o-phenylene-diamine(Cl-BHP), N,N'-bis(5-methyl-2-hydroxybenzyl)-o-phenylene-diamine (Me-BHP) and N,N'-bis(5-methoxy-2-hydroxybenzyl)-o-phenylenediamine(MeO-BHP) were synthesized. The ligands were characterized by elemental analysis, mass and NMR spectroscopy. The elemental analysis showed that the ligands were isolated as dihydrochloride salt. The potentiometry study revealed that the proton dissociation constants(logKnH) of ligands and stability constants (logKML) of transition and heavy metals complexes. The order of the stability constants of each metal ions for ligands was Br-BHP < Cl-BHP < H-BHP < MeO-BHP < Me-BHP.

The thiophene or furan-containing hexadentate ligands 1,12-bis (2-theophene)-2,5,8,11-tetraazadodecane(Thiotrien ․4HCl) and 1,12-bis (2-furan)-2,5,8,11-tetraazadodecane(Furatrien․4HCl) were synthesized as their tetrahydrochloride salt and characterized by EA, IR, NMR, and Mass spectrum. Their protonation constants (logKnH) and stability constants (logKML) for Cd2+, Pb2+, Zn2+ and Cu2+ ions were determined in aqueous solution by potentiometry and compared with 1,12-bis(2-pyridyl)-2,5,8,11-tetra-azadodecane(Pytrien) of pyridyl-containing ligand. The effect stability constants of ligands and metal ion for removal of heavy metals in aqueous solution were described.

Separation of strontium ion from synthetic seawater in the contained liquid membrane permeator with two micro-porous films was performed. The permeator consisted of a liquid membrane and two cells for aqueous solutions. The liquid membrane consisted of D2EHPA(di-2-ethylhexyl-phosphoric acid) and DCH18C6 (dicyclohexano-18-crown-6), diluted to 30 vol % with kerosine and was trapped between two micro-porous hydrophilic films. This liquid membrane separated two aqueous solutions, one of which was synthetic seawater and the other of which was the stripping solutions consisting of 1㏖/L H2SO4 Solution. The effects of various operating parameters on the extraction rate and equilibrium extraction ratio of strontium ion from synthetic seawater were experimentally examined. The addition of DCH18C6 to the D2EHPA solution caused synergy effect on the extraction of strontium ion. The permeator extracted strontium ion from synthetic seawater effectively with high membrane life time.

Result of this study indicate that two criteria must be met in order to have effective macrocycle-mediated transport in these emulsion system. First, one must effective extraction of the post transition metals, Cd^2+ Pb^2+ and Hg^2+,into toluene membrane. The effectiveness of this extraction is greatest if log K values for the metal-macrocycle interaction is large. Second, the ratio of the log K values for the metal ion-receiving phase to the metal ion-macrocycle interaction must be large enough to ensure quantitative stripping of the metal ion at the toluene phase interface. Control of the first step can be obtained by appropriate selection of macrocycle donor atom, substituents, and cavity radius. The second step can be controlled by selecting the proper complexing agent for inclusion in the receiving phase. The order of the transport, when using the several A^- species such as SCN^-,I^-,Br and Cl^- is the order of the changing degree of solvation for A^- and the transport of the metals is also affected by the control of concentration for receiving species because of solubility-differences. In this study, we can seperate each single metal ion from the mixture of Cd^2+, Pb^2+, and Hg^2+ ions by using the toluene membranes controlled by optimized conditions. Transport of the single metal is also very good, and alkaline and alkaline earth metals as interferences ions did not affect the seperation of the metals in this macrocycle-liquid membrances but transition metal ions were partially affected as interferences for the post transition metal ions.