This paper presents methods of modifying the active carbon with oxidizing agent and high temperature treatment.The ion exchange capacity of modified active carbon were detected.The active carbon has been amployed as a...This paper presents methods of modifying the active carbon with oxidizing agent and high temperature treatment.The ion exchange capacity of modified active carbon were detected.The active carbon has been amployed as an adsorbent for removing of Cr(Ⅲ) from equeous solution.The effect of removal of Cr(Ⅲ) of the pH of solution and time of adsorption were discussed.In addition,the mechanism of adsorption with modified the active carbon for Cr(Ⅲ) were discussed.展开更多
In this paper the crosslinking reaction between partially hydrolyzed Polyacrylamide (HPAM) with ultrahigh molecular weight and chromium (Ⅲ) was investigated by atomic absorption method. The results showed that when t...In this paper the crosslinking reaction between partially hydrolyzed Polyacrylamide (HPAM) with ultrahigh molecular weight and chromium (Ⅲ) was investigated by atomic absorption method. The results showed that when the concentration of HPAM was fixed , the crosslinking density decreased with the increase of n (COO -)/ n . When the amount of Cr(Ⅲ) was fixed, the crosslinking density increased with the increase of n (COO -)/ n . When the initial pH value of HPAM/Cr(Ⅲ) system was between 4 and 8, the crosslinking density increased with the increase of pH value. The crosslinking density also increased with the increase of temperature and the increase of salinity.展开更多
文摘This paper presents methods of modifying the active carbon with oxidizing agent and high temperature treatment.The ion exchange capacity of modified active carbon were detected.The active carbon has been amployed as an adsorbent for removing of Cr(Ⅲ) from equeous solution.The effect of removal of Cr(Ⅲ) of the pH of solution and time of adsorption were discussed.In addition,the mechanism of adsorption with modified the active carbon for Cr(Ⅲ) were discussed.
文摘In this paper the crosslinking reaction between partially hydrolyzed Polyacrylamide (HPAM) with ultrahigh molecular weight and chromium (Ⅲ) was investigated by atomic absorption method. The results showed that when the concentration of HPAM was fixed , the crosslinking density decreased with the increase of n (COO -)/ n . When the amount of Cr(Ⅲ) was fixed, the crosslinking density increased with the increase of n (COO -)/ n . When the initial pH value of HPAM/Cr(Ⅲ) system was between 4 and 8, the crosslinking density increased with the increase of pH value. The crosslinking density also increased with the increase of temperature and the increase of salinity.
