CAJ | 학술논문

以活性炭为载体，采用沉淀法制备纳米铁／活性炭新型材料，对活性炭的结构变化进行BET 和TEM表征分析，研究纳米铁负载前后活性炭对水中铜离子的吸附能力以及pH值、起始浓度、吸附时间等因素对吸附性能的影响，同时考察其再生性能。结果表明：纳米铁成功负载于活性炭上，随着pH值的增加，吸附容量逐渐增大，当pH＝6时，纳米铁／活性炭的最大吸附量为18．73 mg／g，与活性炭相比提高了150％。新型材料对铜离子的吸附过程符合Langmuir和Freundlich吸附模型，对铜离子的吸附量随时间变化的规律符合准二级动力学模型，由于负载的纳米铁阻碍了铜离子向材料表面扩散，其吸附速率仅为0．002 g／（mg· min），与活性炭相比下降了60％左右。新型材料再生效率高，具有较好的应用前景。
이활성탄위재체，채용침정법제비납미철／활성탄신형재료，대활성탄적결구변화진행BET 화TEM표정분석，연구납미철부재전후활성탄대수중동리자적흡부능력이급pH치、기시농도、흡부시간등인소대흡부성능적영향，동시고찰기재생성능。결과표명：납미철성공부재우활성탄상，수착pH치적증가，흡부용량축점증대，당pH＝6시，납미철／활성탄적최대흡부량위18．73 mg／g，여활성탄상비제고료150％。신형재료대동리자적흡부과정부합Langmuir화Freundlich흡부모형，대동리자적흡부량수시간변화적규률부합준이급동역학모형，유우부재적납미철조애료동리자향재료표면확산，기흡부속솔부위0．002 g／（mg· min），여활성탄상비하강료60％좌우。신형재료재생효솔고，구유교호적응용전경。
Nano-iron was doped into activated carbon by a simple precipitation method .The new material was characterized by BET and TEM and further it along with activated carbon were evaluated in the ad -sorptive capacity for different factors such as pH , initial concentrations , adsorption time and under batch tests and regenerability was also conducted .The results showed that nano-iron particles were successfully doped into activated carbon. The adsorption process of the new material was more favorable at high pH value, and when pH equals 6, the maximum adsorptive capacity of nano-iron and activated carbon a-chieves to 18.73 mg/g, which is higher then that of activated carbon , increases by 150%.Adsorption i-sotherm fitted well Langmuir and Freundlich models .And adsorption kinetics fitted well with Pseudo-sec-ond -order models , as to the loading nano-iron may cause obstruction of copper diffusion to the active ad-sorptive sites, in comparing with the adsorption rate of activated carbon , that was only 0.002 g/( mg· min) , decreases by 60 %.The new material has a good regenerability and better application prospect .