THE PREPARATION OF CROSSLINKED N，O—CARBOXYMETHYL CHITOSAN RESINS AND THEIR ADSORPTION PROPERTIES FOR TRIGLYCERIDE IN SERUM

Crosslinked N,O-carboxymethyl chitosan resins which can selectively adsorb triglyceride,were prepared by the reaction of N,O-carboxymethyl chitosan with glutaraldehyde solution.Adsorption experiments were performed by adding the resins to the serum.The results showed that this type of adsoirbent could cut down the concentration of triglyceride in serum by 56.4%(3.35mg/g resin)at most,while concentration of the total protein(TP) decreased only by 10.9% at least,so this novel adsorbent can be used to cure hypertriglyceridemia by hemoperfusion in the future.     

STUDY ON THE SORPTION BEHAVIOR OF N—METHYL—2—THIO—IMIDAZOLE RESIN FOR Rh（Ⅲ）AND SEPARATION OF Rh（Ⅲ）WITH COMMON METAL IONS BY USING MTIR

The sorption behavior of N-methyl-2-thio-imidazole resin(MTIR) for Rh(Ⅲ） was investigated.The optmum sorption condition of MTIR for Rh(Ⅲ）,sorption rate t1/2=84min,sorption capacity 1.37mmol Rh(Ⅲ）/g MTIR,[140.5mg Rh(Ⅲ）/g MTIR],sorption molar ratio 0.34Rh(Ⅲ）/functional group,distribution coefficient D=2.5×10^3mg·g^-1 were determined.The sorption selectivity of MTIR for Rh(Ⅲ）in the presence of common metal ions,Fe^3+,Co^2+,Ni^2+ and Cu^2+ was examined.Rh(Ⅲ） adsorbed on MTIR can be eluted quantitatively by using a mixed solution composed of 20% thio-urea-acetone:6mol HCl.dm^-3(1:1vol.) used as an eluent.Rh(Ⅲ） can be separated from the mixture of Rh(Ⅲ） and Fe^3+,Co^2+,Ni^2+,Cu^2+ by using D72 resin and MTIR successively.     

STUDY ON THE TREATMENT AND REUSE OF WASTEWATER FROM THE PRODUCTION OF 2—NAPHTHANOL

Systematic studies on the treatment and reuse of the acid industrial watewater containing sodium 2-Naphthylsulfonate(β-salt)from 2-Naphthanol production process by ND-910 resin (made by self) is reported in this paper.Under the operation conditions of initial β-salt concentration of 10000-25000mg/L and initial CODCr of 20000-40000mg/L,the removal rates of Sodium 2-Naphthylsulfonate and CODCr are over 95% and over 89%,respectively.The effluent can be discharged directly after biological degradation.The working sorption capacity of ND-910 Resin for β-salt is over 230g/kg.An alkali-water wash procedure isutilized to regenerate resin and the reclaiming rate of β-salt is over 98%.     

A CLUSTER COMPOUND WITH DI-ENDOXYGEN LIGANDS——THE CRYSTAL AND MOLECULAR STRUCTURE OF [Fe(MOS_4O)_2][N(C_2H_5)_4]3

[Fe(MoS_4O)_2] [N(C_2H_3)_4]_3 cluster compound with di-end-oxygen ligands has been prepared and characterized by the X-ray diffraction method. The compound crystallizes in a monoclinic space group P2_1/n with lattice parameters a=13.019(4), b=16.959(5), c=18.234(5), β=97.34(2)(°), Z=4. The final agreement factors are R=0.0740, Rw=0.0598. The terminal bond length, Mo-S_t and bridged one, MO-S_b for the compound are much longer than the counterpart without end-oxygen ligand. It possibly suggests that low valence of molybdenum and smaller electronegativity of sulphur than oxygen lead to the charge transfer as S→Mo→O.