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
从已运行一年的三相内循环好氧生物流化床系统中分离筛选出一株降解酸性红B的高效耐盐菌株BY-2,通过对菌株的理化形态特征及16s r RNA序列分析,初步确定菌株BY-2为Pseudomonas sp.属。考察了初始pH、盐度、染料浓度以及接种量等条件对...从已运行一年的三相内循环好氧生物流化床系统中分离筛选出一株降解酸性红B的高效耐盐菌株BY-2,通过对菌株的理化形态特征及16s r RNA序列分析,初步确定菌株BY-2为Pseudomonas sp.属。考察了初始pH、盐度、染料浓度以及接种量等条件对酸性红B降解与菌体生长的影响。结果表明:初始pH为7,盐浓度为50 g×L^(-1),酸性红B初始浓度为500 mg×L^(-1),接种量2%,反应18 h时,酸性红B的降解率可达90%以上。降解中间产物的紫外-可见光光谱和GC-MS分析说明菌株BY-2对酸性红B有良好的降解作用,菌株BY-2在实际染料废水处理中具有潜在应用价值。展开更多
文摘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.