外文翻译-功能化树脂吸附水溶性染料的研究.doc

1、目录原文11 INTRODUCTION22 EXPERIMENTAL33 RESULTS AND DISCUSSION64 CONCLUSIONS135 REFERENCES13译文151 绪论162实验部分173结果与讨论194 结论255 参考文献2526原文Adsorption of Water-Soluble Dye onto Functionalized ResinYing Yu and Yuan-Yi Zhuang,y and Zhong-Hua WangyChemistry Department, Central China Normal University, Wuhan 43

2、0079, Peoples Republic of China; and College of Environmental Science and Engineering, Nankai University, Tianjin 300071, Peoples Republic of ChinaReceived October 30, 2000; accepted June 15, 2001; published online August 27, 2001The adsorption of water-soluble dye reactive brilliant blue KN-R onto

3、the functionalized resin NKY has been dynamically and thermodynamically investigated. The adsorption rate constant is obtained from the first-order expression log(Qe - Q) log Qe -kadt/2.303. The adsorption is complex since the equilibrium data are well described by the Langmuir equation, the Freundl

4、ich equation, and the three-parameter equation. The first layer adsorption of KN-R onto NKY is physical, enhanced by a chemical effect, but multilayer adsorption is typically physical adsorption at normal temperature. The adsorption process is endothermic. The obtained standard free energy change an

5、d the inferred standard entropy change show that the adsorption of the dye onto NKY can occur spontaneously. Moreover, the effect of pH and temperature on the adsorption has been explored. The apparent activation energy Ea of the adsorption process has been calculated as well. Key Words: adsorption;

6、 functionalized resin; water-soluble dye; dynamics; thermodynamics; batch.1 INTRODUCTIONWater-soluble dye reactive brilliant blue KN-R has good chromaticity and is often used to dye cotton fabric. The dye is not easily dealt with because conventional processes and methods are not able to achieve ade

7、quate color removal (that is, decolorization efficiency is more than 96%) for its high solubility(1). A number of adsorbents (natural clay, bagasse pith, maize cob, activated carbon, and so on) have been used for dyestuffs and were effective in the decolorization (25). However, since the adsorbents

8、adsorb the dyes according to their high specific surface area and the regeneration of the adsorbents often entails costs, significant it is difficult for the dyes to be recovered from the adsorbents. Moreover, discarding the adsorbing dyes might lead to secondary pollution of the environment. To our

9、 knowledge, there has been little reported about the regeneration of the above adsorbents.Because the resin method does not share in the shortcomings of the extraction method (6) and because the resins can be regenerated and reused for continuous process (7), the method is extensively used to separa

10、te organic chemicals from mixtures.Regarding the adsorption of dyes using synthesized resins, the only recent reports cover novel synthetic adsorbents Ambersorb 572, Ambersorb 1500, and Calgon F-400C, which were utilized to remediate dyehouse effluent (8). To lower the treatment price, to recover dy

11、e and its intermediate from dye wastewater, and to prevent dye from polluting the environment, further studies are needed.We have investigated the interaction between organic flocculant PAN-DCD and dye in detail (9) and found that some groups in PAN-DCD react with the sulfonic acid group in the dye

12、molecules, leading to the formation of a weak chemical bond. Based on this discovery,we have synthesized a novel resin NKY. The resin has a specific group similar to that in the organic flocculant (10). Through the weak chemical bond, the dye gets adsorbed onto the resin and can be recovered from th

13、e resin by adding regenerant. In this paper, we will discuss the adsorption behavior of the dye reactive brilliant blue KN-R onto the resin NKY modified with dicyandiamide.2 EXPERIMENTALApparatusSpectrophotometric measurements were carried out on a 722 visible spectrometer in the 350620 nm range usi

14、ng 1-cm matched glass cells. The pH measurements were conducted with a PHS-3C pH-meter with a combined glass electrode. The batch adsorption experiment was carried out using a thermostated shaker bath (THZ-82, China).MaterialsThe dye reactive brilliant blue KN-R (CI) reactive blue 19(61200); abbrevi

15、ated as KN-R in this paper) came from a commercial source and was used without further purification. Its structure is as follows:The macroporous resin intermediate (MRI) whose specific surface area, particle size, and chloride content were 311 m2/g, 13 mm, and 14.6%, respectively, was supplied by Ch

16、emical Factory of Nankai University. NKY was synthesized by ourselves (11). In a 500-cm3 reaction vessel equipped with a paddle mixer the immersed MRI and dicyandiamide were mixed with 200 cm3 of dimethyl formamide (DMFA). When the temperature rose to 333 K, a NaOH solution was added. The reaction had proceeded for 4 h at 373 K. After cooling, filtering off, and washing with distilled wa