CAJ | 학술논문

以竹炭和经化学改性竹炭作为吸附剂，研究其对水溶液中Cd2+的吸附特性，探讨了竹炭对Cd2+的吸附热力学和吸附动力学性质，通过单因子优化实验探讨了温度、竹炭投加量和pH值对吸附效果的影响。结果表明：竹炭及改性竹炭对Cd2+的吸附动力学过程符合准二级动力学模型，在18h可达到平衡；其等温吸附曲线符合Langmuir方程，最大吸附量分别为10．18mg/g和16．71mg/g；两者对Cd2+的吸附受温度的影响较小；竹炭及改性竹炭的最佳投加量分别为0．8g、0．6g；pH对竹炭及改性竹炭吸附Cd2+的影响较大，在pH 2~6范围时，竹炭及改性竹炭对Cd2+的吸附量随pH的增加而增加。
이죽탄화경화학개성죽탄작위흡부제，연구기대수용액중Cd2+적흡부특성，탐토료죽탄대Cd2+적흡부열역학화흡부동역학성질，통과단인자우화실험탐토료온도、죽탄투가량화pH치대흡부효과적영향。결과표명：죽탄급개성죽탄대Cd2+적흡부동역학과정부합준이급동역학모형，재18h가체도평형；기등온흡부곡선부합Langmuir방정，최대흡부량분별위10．18mg/g화16．71mg/g；량자대Cd2+적흡부수온도적영향교소；죽탄급개성죽탄적최가투가량분별위0．8g、0．6g；pH대죽탄급개성죽탄흡부Cd2+적영향교대，재pH 2~6범위시，죽탄급개성죽탄대Cd2+적흡부량수pH적증가이증가。
Bamboo charcoal and chemically modified bamboo charcoal are picked as adsorbent to study the adsorption of Cd2+in a-queous solution. Through the single factor optimization experiment,adsorption isotherm,kinetics and effect factors such as tempera-ture,dosage and pH are investigated. Sorption kinetics of Cd2+ onto bamboo charcoal followed pseudo second order kinetics model, and equilibrium can be achieved in 18h. Adsorption isotherm fit well with Langmuir equation,and the maximum adsorption amounts of Cd2+ on bamboo charcoal and chemically modified bamboo charcoal are 10. 18 mg/g and 16. 71 mg/g,respectively. The influence of temperature on the adsorption of Cd2+by the both is little. The best dosages of bamboo charcoal and chemically modified bamboo charcoal are 0. 8g and 0. 6g,respectively. The pH effect on the adsorption of Cd2+by bamboo charcoal and chemically modified bam-boo charcoal is strong,when pH is 2 to 6,the adsorption of Cd2+increases with pH.