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我院禹兴海等老师科研成果发表在Environmental Science等期刊上
发布时间:2013-06-02  |  查看次数:[]

内容导读:我院禹兴海、王俊科等老师发表科研论文

1. 禹兴海老师科研论文“Absorption of Ni (II) from aqueous solution by magnetic chitosan resin.”发表在Environmental Science: An Indian Journal.2013, 8(2): 62-70.

论文摘要:The purpose of this work is to prepare a low-cost biosorbent, Magnetic chitosan resin (MCR), and determine the ability of this biosorbent to removing Ni (II) ion from aqueous medium. The characteristics of this biosorbent such as adsorption isotherms, the influence of pH value,adsorption time and temperature were all researched. The adsorption equilibrium was achieved after about 150 min at pH=6 and the equilibrium date were fitted better with the Langmuir isotherm equation than Freundlich mode. The maximum adsorption capacity was 14.47 mg·g-1. Both kineticsand thermodynamic parameters of the adsorption process were alsoest imated. The thermodynamic parameters indicated an exothermic spontanous process and the kinetics followed the second order-adsorption process. Moreover, the magnetic chitosan resin (MCR) could be regenerated through the desorption of the Ni (II) ions using 0.1 mol·L-1HCL solution and could be reused to adsorb again. Overall the results reported herein indicated that the magnetic chitosan resin(MCR) with high adsorption efficiency and magnetic property is very attractive and implies a potential of practical application for removing Ni (II) ion from aqueous medium.

2. 王俊科老师科研论文“PEG–SO3H as an efficient and reusablecatalyst for chemoselective synthesis of 1,1-diacetates”发表在Chinese Chemical Letters2013,24:140–142.

3. 金淑萍老师科研论文 “Preparation and Properties of a Degradable Interpenetrating Polymer Networks Based on Starch with Water Retention, Amelioration of Soil, and Slow Release of Nitrogen and Phosphorus Fertilizer”发表在Journal of Applied Polymer Science 2013,128: 407–415.

论文摘要:In this study, we aimed to develop a degradable nitrogen and phosphorus (NP) fertilizer with properties of slow release, water retention, and remediation of saline soil; the nitrogen and phosphorus was coated with starch/poly(acrylic acid-co-acrylamide) [poly(AA-co-AM)] superabsorbent (SAAmF) by reverse suspension radical copolymerization. The variable influences on the water absorbency were investigated and optimized. The results of the structure and morphology characterization of SAAmF show that poly(AA-co-AM) was grafted partly from the chain of starch, and the different contents of starch brought about a difference in the size of the three-dimensional net hole of the coating polymer. The property of water retention, the behaviors of slow release of nutrient, and the degradation of the SAAmF were evaluated, respectively, and the results revealed that the water transpiration ratio of soil with SAAmF was lower by approximately 8 percentage points than that of the blank test, about 60% nutrient was released from SAAmF by the 30th day, and 32 wt % of SAAmF with a content of starch of 20% was degraded after 55 days. Moreover, a considerable decrease in the conductivity was bserved, which revealed a sharp reduction in the concentration of residual ions for the soilmixed with SAAmF. Itmay be inferred fromthese that the product seems to be a promising vehicle for the management of soils, including saline soils.

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