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Adsorption behavior of Azo Dye C. I. Acid Red 14 in aqueous solution on surface soils 被引量:8
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作者 QU Baocheng ZHOU Jiti XIANG Xuemin ZHENG Chunli ZHAO Hongxia ZHOU Xiaobai 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2008年第6期704-709,共6页
Azo dyes have received considerable attention because of their association with various human health problems. The aim of the investigation is to determine the adsorption behavior ofazo dyes in aqueous solution on DG0... Azo dyes have received considerable attention because of their association with various human health problems. The aim of the investigation is to determine the adsorption behavior ofazo dyes in aqueous solution on DG06, GSE17200, and GSE17201 soils using C. I. Acid Red 14 (AR14) as example. The experimental results indicate that the Freundlich model expresses the adsorption isotherm better than the Langmuir model and the pseudo-second-order model achieves adsorption of AR14 on the three soils well. Based on the pseudo-second-order model, the adsorption thermodynamic of AR14 on DG06 soil have been studied and the thermodynamics parameter of AGO is determined and AGO value shows the adsorption process of AR14 on DG06 is mainly physical in nature. Furthermore, the effects of temperature, pH and salinity (NaC1) on adsorption have been investigated. The decrease in pH or the increase in salinity enhances the adsorption of AR14 by DG06, GSE17200, and GSE17201. 展开更多
关键词 SOIL azo dyes C. I. Acid Red 14 (ar14) adsorption isotherm adsorption kinetics adsorption thermodynamics
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煅烧温度对Pr_(6)O_(11)@C光催化性能的影响
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作者 谭贺云 孙巧萍 +1 位作者 肖忠连 郝仕油 《中国稀土学报》 EI CAS CSCD 北大核心 2022年第5期770-777,共8页
以Pr(NO_(3))_(3)·6H_(2)O和酸性红14(AR14)为原料,利用NH_(3)·H_(2)O做沉淀剂,使Pr^(3+)和AR14共沉积生成Pr(OH)_(3)@AR14,通过在惰性气体中煅烧获得Pr_(6)O_(11)@C。利用X射线衍射(XRD),扫描电镜(SEM),傅里叶转换红外光谱(F... 以Pr(NO_(3))_(3)·6H_(2)O和酸性红14(AR14)为原料,利用NH_(3)·H_(2)O做沉淀剂,使Pr^(3+)和AR14共沉积生成Pr(OH)_(3)@AR14,通过在惰性气体中煅烧获得Pr_(6)O_(11)@C。利用X射线衍射(XRD),扫描电镜(SEM),傅里叶转换红外光谱(FT-IR),紫外-可见光谱(UV-vis),X射线光电子能谱(XPS),荧光光度计(PL)等手段考察了煅烧温度对Pr_(6)O_(11)@C光催化效率的影响。结果表明,600℃煅烧合成产物的光催化效率高于450和700℃煅烧合成产物的,因为600℃煅烧合成产物光吸收效果好、表面羟基含量高、氧空位和碳键数量多,利于提高有机污染物吸附量,增加光生电子与空穴产率及其分离效率。 展开更多
关键词 煅烧温度 Pr_(6)O_(11)@C 碳键 光催化 ar14
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