Synthetic control of three-dimensional porous cellulose-based bioadsorbents: correlation between structural feature and metal ion removal capability

摘要: To understand the correlation between structural feature and removal capability, a series of cellulose-based bioadsorbents with controlled pore size functional group contents were designed synthesized by grafting acrylic acid acrylamide onto cellulose backbone chains. The adsorption behavior these to three metal ions [Cr(III), Cu(II) Co(II)] in aqueous solution was investigated. their capability studied detail. obtained interacted different ions, exhibiting highly effective ion from at wide pH range 3.0–5.0. maximum Cr(III), Co(II) determined as 220.64, 213.49 137.55 mg/g, respectively, when treated 2000 mg/L 3.0 for 14 h. Moreover, competitive showed that had higher selectivity Cr(III) (54.72 mg/g) coexistence Co(II). mechanisms interpreted considering groups bioadsorbent, characteristics, varitation acidity. could be ascribed stronger attraction lone pair electrons both oxygen nitrogen atom form more stable complexes, while only carboxyl/carbonyl participated These results are important because they provide not approach structure-controlled adsorbent pollutant removal, but also interesting information concerning structures based on surface groups.