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采用紫外可见分光光度法测定木质素磺酸钠在CaCO3表面的吸附量,分析不同粒径的CaCO3在不同浓度木质素磺酸钠溶液中的吸附行为。结果表明:当CaCO3粒径在25～80μm之间、吸附时间为5～60min时,吸附量和吸附率随CaCO3粒径增大而减小,随吸附时间的延长而增大;木质素磺酸钠浓度在0.1～0.4g/L之间时,吸附量随木质素磺酸钠浓度的增大而增大,吸附率随木质素磺酸钠浓度的增大而减小;等温吸附线形状为L型,且基本满足Langmuir等温吸附方程,饱和吸附量为2.165mg/g。
The amount of sodium lignosulphonate adsorbed on the surface of CaCO 3 was determined by UV-Vis spectrophotometry, and the adsorption behavior of CaCO 3 with different particle sizes in different concentrations of sodium lignosulphonate solution was analyzed. The results showed that when CaCO3 particle size is between 25 ~ 80μm and adsorption time is 5 ~ 60min, the adsorption capacity and adsorption rate decrease with the increase of CaCO3 particle size and increase with the increase of adsorption time. Lignosulfonic acid When the concentration of sodium was between 0.1-0.4 g / L, the adsorption capacity increased with the increase of sodium lignosulfonate concentration, and the adsorption rate decreased with the increase of sodium lignosulfonate concentration. L-type, and basically meet the Langmuir isotherm equation, the saturated adsorption capacity of 2.165mg / g.