Adsorption of Cd and Pb to components of surface coatings developed in five natural waters(Jilin Province, China) was carried out. The result indicates that the content of Fe oxides on surface coatings is much higher ...Adsorption of Cd and Pb to components of surface coatings developed in five natural waters(Jilin Province, China) was carried out. The result indicates that the content of Fe oxides on surface coatings is much higher than that of Mn oxides. Langmuir isotherm is more suitable to describe the adsorption of Cd and Pb onto surface coatings. The maximum adsorption of Pb and Cd to surface coatings is directly proportional to the contents of Mn oxides and Fe oxides on surface coatings with significant correlation( n=5, α =0.01), respectively, and to the content of aluminum oxides with significant correlation (n=5, α =0.05), highlighting the relative importance of metal oxide fraction for Pb and Cd adsorption to the surface coatings developed in the five natural waters. The result agrees with that previously obtained by selective extraction technique for the relative importance of Fe and Mn oxides and organic materials in controlling Cd and Pb adsorption to surface coatings developed in Cayuga Lake(New York, USA)展开更多
采用化学还原法,以稀硝酸银溶液为前驱体,通过两步法制备纳米片状银粉。试验考察了十二烷基三甲基溴化铵用量、稀硝酸银溶液用量及吸附剂种类对纳米片状银粉的影响。结果表明,在十二烷基三甲基溴化铵0.000 5 g,稀硝酸银溶液2 m L,CTAB、...采用化学还原法,以稀硝酸银溶液为前驱体,通过两步法制备纳米片状银粉。试验考察了十二烷基三甲基溴化铵用量、稀硝酸银溶液用量及吸附剂种类对纳米片状银粉的影响。结果表明,在十二烷基三甲基溴化铵0.000 5 g,稀硝酸银溶液2 m L,CTAB、PVP和柠檬酸3种吸附剂协同作用条件下,制备的纳米片状银粉颗粒尺寸均匀,分散性好。展开更多
文摘Adsorption of Cd and Pb to components of surface coatings developed in five natural waters(Jilin Province, China) was carried out. The result indicates that the content of Fe oxides on surface coatings is much higher than that of Mn oxides. Langmuir isotherm is more suitable to describe the adsorption of Cd and Pb onto surface coatings. The maximum adsorption of Pb and Cd to surface coatings is directly proportional to the contents of Mn oxides and Fe oxides on surface coatings with significant correlation( n=5, α =0.01), respectively, and to the content of aluminum oxides with significant correlation (n=5, α =0.05), highlighting the relative importance of metal oxide fraction for Pb and Cd adsorption to the surface coatings developed in the five natural waters. The result agrees with that previously obtained by selective extraction technique for the relative importance of Fe and Mn oxides and organic materials in controlling Cd and Pb adsorption to surface coatings developed in Cayuga Lake(New York, USA)
文摘采用化学还原法,以稀硝酸银溶液为前驱体,通过两步法制备纳米片状银粉。试验考察了十二烷基三甲基溴化铵用量、稀硝酸银溶液用量及吸附剂种类对纳米片状银粉的影响。结果表明,在十二烷基三甲基溴化铵0.000 5 g,稀硝酸银溶液2 m L,CTAB、PVP和柠檬酸3种吸附剂协同作用条件下,制备的纳米片状银粉颗粒尺寸均匀,分散性好。
