CAJ | 학술논문

以去金属离子处理后的漂白硫酸盐桉木浆及针叶木浆为原料,研究纸浆纤维对Ca～(2+)的吸附动力学及影响吸附的因素.结果表明:Ca～(2+)初始浓度较低时,漂白化学木浆对Ca～(2+)的吸附能力随着Ca～(2+)初始浓度的增加而快速提高.Ca～(2+)初始浓度0.471 7 mmol/L时,阔叶木浆达到饱和吸附,吸附量为0.016 0 mmol/g;针叶木浆在Ca～(2+)初始浓度为0.220 1 mmol/L时就达到饱和吸附,吸附量为0.008 4 mmol/g,吸附能力与针阔叶浆各自所带羧基量一致.在pH 7.5、温度25 ℃条件下,符合Langmuir方程等温吸附线,且纸浆对Ca~(2+)的吸附为单分子吸附.Ca～(2+)浓度和pH的升高将使纸浆纤维对Ca～(2+)的吸附能力提高,阔叶木浆和针叶木浆中Ca～(2+)加入量为0.035 6和0.016 5 mmol/g时,木浆达到饱和吸附.pH超过7,纸浆表面游离羧基将完全被Ca～(2+)吸附;纸浆纤维对Ca～(2+)的吸附属放热吸附,提高温度将会降低纸浆纤维对Ca～(2+)的吸附量.
이거금속리자처리후적표백류산염안목장급침협목장위원료,연구지장섬유대Ca～(2+)적흡부동역학급영향흡부적인소.결과표명:Ca～(2+)초시농도교저시,표백화학목장대Ca～(2+)적흡부능력수착Ca～(2+)초시농도적증가이쾌속제고.Ca～(2+)초시농도0.471 7 mmol/L시,활협목장체도포화흡부,흡부량위0.016 0 mmol/g;침협목장재Ca～(2+)초시농도위0.220 1 mmol/L시취체도포화흡부,흡부량위0.008 4 mmol/g,흡부능력여침활협장각자소대최기량일치.재pH 7.5、온도25 ℃조건하,부합Langmuir방정등온흡부선,차지장대Ca~(2+)적흡부위단분자흡부.Ca～(2+)농도화pH적승고장사지장섬유대Ca～(2+)적흡부능력제고,활협목장화침협목장중Ca～(2+)가입량위0.035 6화0.016 5 mmol/g시,목장체도포화흡부.pH초과7,지장표면유리최기장완전피Ca～(2+)흡부;지장섬유대Ca～(2+)적흡부속방열흡부,제고온도장회강저지장섬유대Ca～(2+)적흡부량.
The adsorbing kinetics and the factors of influencing calcium ion adsorption of both deionized BKP hard wood pulp and soft wood pulp were studied in this paper. The results showed that the adsorption capability of pulp fiber rise (along) with the augment of the beginning consistency of Ca~(2+) at a low Ca~(2+) consistency. The saturation adsorption capability of hard wood pulp is 0.016 0 mmol/g at the content of Ca~(2+) 0.471 7 mmol/L, and the soft wood pulp being 0.008 4 mmol/g at the content of Ca~(2+) 0.220 1mmol/L, which accords with the carboxyl content of pulps. At the conditions of pH 7.5 and 25 ℃, c_e/Q and c_e keep excellent linearity relationship, the R~2 being respectively 0.95 and 0.99. It indicates the adsorption between pulp fiber and Ca~(2+) is chemistry adsorption, which accords with Langmuir isothermal equation, also belongs to single molecular adsorption. The adsorption capacity of chemical wood pulp fiber on Ca~(2+) rise along with pH or content of Ca~(2+), and the saturated adsorption content of Ca~(2+) of both BKP hard wood pulp and BKP soft wood pulp is 0.035 6 mmol/g and 0.016 5 mmol/g, the pulp being entirety saturated adsorption with Ca~(2+) after pH 7. Arising temperature will low the adsorption capacity, which belongs to exothermic adsorption between pulp fibers and Ca~(2+).