CAJ | 학술논문

【目的】制备钠基膨润土并探讨其对Cu（Ⅱ）的吸附特性和规律．【方法】以氯化钠作钠化剂，采用悬浮液法工艺对钙基膨润土进行钠化改型制得钠基膨润土，然后用钠基膨润土对Cu（Ⅱ）进行吸附研究，通过吸附等温线的拟合探讨其吸附特性以及酸度、温度对吸附的影响．【结果和结论】改型膨润土对Cu（Ⅱ）的吸附符合Freundlich吸附模型，是一种单分子层的表面吸附，90 min可达到吸附平衡，酸度越低吸附量越大，但pH大于5以后，吸附量就趋于稳定；而温度越高吸附量越小，当温度高于35℃后，吸附量就基本不变．在25℃和pH5时，向50 mL 10.0 mg· L-1的铜离子溶液中加入0.200 g改型膨润土，去除率达到97.85％，表明该改型膨润土可在铜离子的去除方面发挥重要作用．
【목적】제비납기팽윤토병탐토기대Cu（Ⅱ）적흡부특성화규률．【방법】이록화납작납화제，채용현부액법공예대개기팽윤토진행납화개형제득납기팽윤토，연후용납기팽윤토대Cu（Ⅱ）진행흡부연구，통과흡부등온선적의합탐토기흡부특성이급산도、온도대흡부적영향．【결과화결론】개형팽윤토대Cu（Ⅱ）적흡부부합Freundlich흡부모형，시일충단분자층적표면흡부，90 min가체도흡부평형，산도월저흡부량월대，단pH대우5이후，흡부량취추우은정；이온도월고흡부량월소，당온도고우35℃후，흡부량취기본불변．재25℃화pH5시，향50 mL 10.0 mg· L-1적동리자용액중가입0.200 g개형팽윤토，거제솔체도97.85％，표명해개형팽윤토가재동리자적거제방면발휘중요작용．
[Objective]To preparing sodium bentonite and investigate its adsorption characteristics to Cu (Ⅱ) .[Method]The calcium bentonite was converted into sodium bentonite with sodium chloride as the conversion agent by suspension method .The adsorption characteristics of modified bentonite to Cu (Ⅱ) were conducted by fitting the adsorption isotherm as well as the influence of the acidity and temperature .[Result and conclusion]It was shown that the adsorption of modified bentonite to Cu (Ⅱ) conformed with the Freundlich pattern ,which was a single molecular layer adsorption , with 90 min reaching to equilibri-um, the lower acidity, the greater adsorption capacity .However, the adsorption capacity reached stabili-ty after pH>5 , the higher temperature , the smaller adsorption capacity , with the adsorption capacity re-maining unchanged when the temperature was higher than 35℃.At the 25℃and pH5 ,the removal rate reached 97.85%when 0.200 g modified bentonite was added to the 50 mL 10.0 mg/L copper ion solu-tion.Results show that the modified bentonite can play an important role in the removal of copper ion .