CAJ | 학술논문

利用废弃的蛋壳制备碳羟基磷灰石(CHAP),研究了其对废水中Mn2+的吸附作用,并探讨了CHAP用量、Mn2+浓度、温度、pH对吸附效果的影响.试验结果表明:在pH值为6、温度为30℃、搅拌时间为1 h、CHAP用量为3 g/L、Mn2+初始浓度为70 mg/L的条件下,CHAP对Mn2+的去除率可达到97.9%,吸附容量为22.84 mg/g;CHAP对Mn2+的吸附过程符合Langmuir和Fre-undlich吸附等温式,吸附反应是自发放热过程;H0准二级动力学模型能较好地描述CHAP对Mn2+的动力学吸附行为.
이용폐기적단각제비탄간기린회석(CHAP),연구료기대폐수중Mn2+적흡부작용,병탐토료CHAP용량、Mn2+농도、온도、pH대흡부효과적영향.시험결과표명:재pH치위6、온도위30℃、교반시간위1 h、CHAP용량위3 g/L、Mn2+초시농도위70 mg/L적조건하,CHAP대Mn2+적거제솔가체도97.9%,흡부용량위22.84 mg/g;CHAP대Mn2+적흡부과정부합Langmuir화Fre-undlich흡부등온식,흡부반응시자발방열과정;H0준이급동역학모형능교호지묘술CHAP대Mn2+적동역학흡부행위.
Mn2+ adsorption of simulated wastewater was conducted with carbonate hydroxyapatite (CHAP) which was synthesized by abandoned eggshell. The main factors that might affect the adsorption performance were investigated, such as CHAP dosage, Mn2+ concentration, reaction temperature and pH. The results show that the removal rate of Mn2+ can reach 97.9% and the adsorption capacity is 22.84 mg/g under the conditions of pH 6, temperature 30 ℃, stirring time 1 h, CHAP dosage 3 g/L and Mn2+ initial concentration 70 mg/L. The adsorption process accords with both Freundlich and Langmuir adsorption isotherm formula. The adsorption reaction is a spontaneous exothermic process. The dynamic data are well represented by the H0 pseudo-second-order kinetic model.