以C.I.Reactive Red 241、C.I.Disperse Blue 56模拟染料废水为对象,研究了电解法处理该类染料废水的优化条件。考察了起始电压、电解时间、溶液初始p H对处理效果的影响。结果表明,在p H=7,U=14V、I=3.2A、t=30min的条件下,C.I.Reactiv...以C.I.Reactive Red 241、C.I.Disperse Blue 56模拟染料废水为对象,研究了电解法处理该类染料废水的优化条件。考察了起始电压、电解时间、溶液初始p H对处理效果的影响。结果表明,在p H=7,U=14V、I=3.2A、t=30min的条件下,C.I.Reactive Red241模拟染料废水的脱色率可达到86%以上;在p H=7,U=14V、I=3.2A、t=25min的条件下,C.I.Disperse Blue 56模拟染料废水的脱色率可达到79以上%。展开更多
The solubility of disperse dyes and their mixture in supercritical carbon dioxide is an important property in study and development of supercritical fluid dyeing technology.In this study,solubilities of C.I.Disperse R...The solubility of disperse dyes and their mixture in supercritical carbon dioxide is an important property in study and development of supercritical fluid dyeing technology.In this study,solubilities of C.I.Disperse Red 73,C.I.Disperse Blue 183 and their mixture in supercritical CO2 are measured at temperatures from 343.2 to 383.2 K and pressures from 12 to 28 MPa with a static recirculation method.Under the experimental conditions for the binary(C.I.Disperse Red 73+CO2 or C.I.Disperse Blue 183+CO2) and ternary(C.I.Disperse Red 73+C.I.Disperse Blue 183+CO2) systems,the solubilities increase with pressure.The solubility of C.I.Disperse Blue 183 decreases with the increase of temperature when the pressure is lower than 16 MPa,and the trend is opposite when the pressure is higher than 16 MPa.However,there is no crossover pressure for C.I.Disperse Red 73.The solubilities are also affected by molecular polarity of dyes.The co-solvent effect exhibited in the dissolving process of mixed dyes promotes their dissolution in supercritical CO2.The experimental data of solubilities of C.I.Disperse Red 73,C.I.Disperse Blue 183,and their mixture are correlated with the Chrastil model and Mendez-Santiago/Teja model. The former is more accurate.展开更多
以Disperse Red 3B染料废水为对象,研究了电催化-光化物化组合技术处理该类染料废水的优化条件。考察了电解温度、电解质NaCl浓度、流速、染液初始pH值对处理效果的影响,且后续加入紫外光汞灯探究物化组合技术对处理效果的影响。结果表...以Disperse Red 3B染料废水为对象,研究了电催化-光化物化组合技术处理该类染料废水的优化条件。考察了电解温度、电解质NaCl浓度、流速、染液初始pH值对处理效果的影响,且后续加入紫外光汞灯探究物化组合技术对处理效果的影响。结果表明,在T=30℃、C_(NaCl)=0.20g/L、V=65.46μl/min、pH=3的条件下,Disperse Red 3B染料废水的脱色率可达到88%以上,继续光照30mins后,COD去除率可以提升3%左右。展开更多
For a better understanding of the feasibility of supercritieal fluid dyeing （SFD） and more available information for the process development, the experiments of dyeing PET textile with C.I. disperse red 60 （anthraq...For a better understanding of the feasibility of supercritieal fluid dyeing （SFD） and more available information for the process development, the experiments of dyeing PET textile with C.I. disperse red 60 （anthraquinone type） and C. I. disperse orange 25 （azo type） in supercritieal CO2 were carried out with a high-pressure dyeing apparatus at temperatures from 80 to 130℃ and pressure up to 31 MPa. The effect of operating conditions on color yield （K/S） was investigated in SFD experiment, and the optimum operating conditions for the above two disperse dyes were obtained as follows： the temperature 120℃, the pressure 25 MPa and the dyeing time 100 min. As compared with SFD, the conventional water dyeing （CWD） was carried out with the same dyes and textile. The results show that the better fastness, levelness and apparent color can be achieved in SFD and the SFD process has many significant advantages over the CWD process.展开更多
This study aims at identifying the microevolutionary processes responsible for the onset of the remarkable phylogeographic structure already recorded for the endangered giant clam Tridacna squamosa across its distribu...This study aims at identifying the microevolutionary processes responsible for the onset of the remarkable phylogeographic structure already recorded for the endangered giant clam Tridacna squamosa across its distribution range.For this purpose,the evolutionary,biogeographic and demographic histories of the species were comprehensively reconstructed in a mitochondrial dataset comprising nearly the whole available published cytochrome c oxidase 1 gene sequences of T.squamosa.Relatively higher level of genetic diversification was unveiled within T.squamosa,in comparison to earlier macro-geographic investigations,whereby five mitochondrial clusters were delineated.The resulting divergent gene pools in the Red Sea,western Indian Ocean,Indo-Malay Archipelago and western Pacific were found to be driven by Early Pleistocene glacial vicariance events among refugial lineages.Accentuated genetic diversification of the species across the Indo-Malay Archipelago was successively triggered by historical dispersal event during the Mid-Pleistocene MIS19c interglacial.This latter historical event might have also enabled genetically distinct giant clams from the Indo-Malay Archipelago to subsequently colonize the western Pacific,accounting for the genetic diversity hotspot detected within this region(comprising three divergent mitochondrial clusters).Late Pleistocene demographic expansion of T.squamosa,during the Last Interglacial period,could have contributed to forging spatial distribution of the so far delineated genetic entities across the Indo-Western Pacific.Overall,being resilient to major climate shifts during the Pleistocene through adaptation and consequent diversification,T.squamosa could be used as a model species to track the impact of climate change on genetic variability and structure of marine species.In particular,the new information,provided in this investigation,may help with understanding and/or predicting the consequences of ongoing global warming on genetic polymorphism of endangered coral reef species among which Tridacna sp.are listed as ecologically important.展开更多
文摘以C.I.Reactive Red 241、C.I.Disperse Blue 56模拟染料废水为对象,研究了电解法处理该类染料废水的优化条件。考察了起始电压、电解时间、溶液初始p H对处理效果的影响。结果表明,在p H=7,U=14V、I=3.2A、t=30min的条件下,C.I.Reactive Red241模拟染料废水的脱色率可达到86%以上;在p H=7,U=14V、I=3.2A、t=25min的条件下,C.I.Disperse Blue 56模拟染料废水的脱色率可达到79以上%。
基金Supported by the Natural Science Foundation of Zhejiang Province（M203035）
文摘The solubility of disperse dyes and their mixture in supercritical carbon dioxide is an important property in study and development of supercritical fluid dyeing technology.In this study,solubilities of C.I.Disperse Red 73,C.I.Disperse Blue 183 and their mixture in supercritical CO2 are measured at temperatures from 343.2 to 383.2 K and pressures from 12 to 28 MPa with a static recirculation method.Under the experimental conditions for the binary(C.I.Disperse Red 73+CO2 or C.I.Disperse Blue 183+CO2) and ternary(C.I.Disperse Red 73+C.I.Disperse Blue 183+CO2) systems,the solubilities increase with pressure.The solubility of C.I.Disperse Blue 183 decreases with the increase of temperature when the pressure is lower than 16 MPa,and the trend is opposite when the pressure is higher than 16 MPa.However,there is no crossover pressure for C.I.Disperse Red 73.The solubilities are also affected by molecular polarity of dyes.The co-solvent effect exhibited in the dissolving process of mixed dyes promotes their dissolution in supercritical CO2.The experimental data of solubilities of C.I.Disperse Red 73,C.I.Disperse Blue 183,and their mixture are correlated with the Chrastil model and Mendez-Santiago/Teja model. The former is more accurate.
文摘以Disperse Red 3B染料废水为对象,研究了电催化-光化物化组合技术处理该类染料废水的优化条件。考察了电解温度、电解质NaCl浓度、流速、染液初始pH值对处理效果的影响,且后续加入紫外光汞灯探究物化组合技术对处理效果的影响。结果表明,在T=30℃、C_(NaCl)=0.20g/L、V=65.46μl/min、pH=3的条件下,Disperse Red 3B染料废水的脱色率可达到88%以上,继续光照30mins后,COD去除率可以提升3%左右。
基金Supported by National Natural Science Foundation of China(No.20277004)
文摘For a better understanding of the feasibility of supercritieal fluid dyeing （SFD） and more available information for the process development, the experiments of dyeing PET textile with C.I. disperse red 60 （anthraquinone type） and C. I. disperse orange 25 （azo type） in supercritieal CO2 were carried out with a high-pressure dyeing apparatus at temperatures from 80 to 130℃ and pressure up to 31 MPa. The effect of operating conditions on color yield （K/S） was investigated in SFD experiment, and the optimum operating conditions for the above two disperse dyes were obtained as follows： the temperature 120℃, the pressure 25 MPa and the dyeing time 100 min. As compared with SFD, the conventional water dyeing （CWD） was carried out with the same dyes and textile. The results show that the better fastness, levelness and apparent color can be achieved in SFD and the SFD process has many significant advantages over the CWD process.
文摘This study aims at identifying the microevolutionary processes responsible for the onset of the remarkable phylogeographic structure already recorded for the endangered giant clam Tridacna squamosa across its distribution range.For this purpose,the evolutionary,biogeographic and demographic histories of the species were comprehensively reconstructed in a mitochondrial dataset comprising nearly the whole available published cytochrome c oxidase 1 gene sequences of T.squamosa.Relatively higher level of genetic diversification was unveiled within T.squamosa,in comparison to earlier macro-geographic investigations,whereby five mitochondrial clusters were delineated.The resulting divergent gene pools in the Red Sea,western Indian Ocean,Indo-Malay Archipelago and western Pacific were found to be driven by Early Pleistocene glacial vicariance events among refugial lineages.Accentuated genetic diversification of the species across the Indo-Malay Archipelago was successively triggered by historical dispersal event during the Mid-Pleistocene MIS19c interglacial.This latter historical event might have also enabled genetically distinct giant clams from the Indo-Malay Archipelago to subsequently colonize the western Pacific,accounting for the genetic diversity hotspot detected within this region(comprising three divergent mitochondrial clusters).Late Pleistocene demographic expansion of T.squamosa,during the Last Interglacial period,could have contributed to forging spatial distribution of the so far delineated genetic entities across the Indo-Western Pacific.Overall,being resilient to major climate shifts during the Pleistocene through adaptation and consequent diversification,T.squamosa could be used as a model species to track the impact of climate change on genetic variability and structure of marine species.In particular,the new information,provided in this investigation,may help with understanding and/or predicting the consequences of ongoing global warming on genetic polymorphism of endangered coral reef species among which Tridacna sp.are listed as ecologically important.
