山东大学学报(工学版)
山東大學學報(工學版)
산동대학학보(공학판)
JOURNAL OF SHANDONG UNIVERSITY(ENGINEERING SCIENCE)
2015年
2期
75-81
,共7页
余美琼%杨金杯%陈秀宇%邓殳
餘美瓊%楊金杯%陳秀宇%鄧殳
여미경%양금배%진수우%산수
锯末%Pb(II)%Ni(II)%吸附%动力学%热力学
鋸末%Pb(II)%Ni(II)%吸附%動力學%熱力學
거말%Pb(II)%Ni(II)%흡부%동역학%열역학
sawdust%Pb(II)%Ni(II)%adsorption%kinetics%thermodynamics
以松树锯末为吸附剂,研究其对水中 Pb(II)和 Ni(II)的吸附性能,研究了锯末用量、搅拌速度、溶液初始 pH值等对吸附效果的影响及其吸附动力学和热力学性能。研究结果表明,锯末对 Pb(II)和 Ni(II)具有良好的吸附能力。锯末对 Pb(II)和 Ni(II)吸附过程均符合拟二级吸附动力学模型(R2≥0.9977),锯末吸附 Pb(II)和 Ni(II)的活化能分别为9.8087 kJ/mol 和2.8594 kJ/mol;锯末对 Pb(II)和 Ni(II)等温吸附符合 Langmuir 模型(R2≥0.9992)。热力学研究表明,锯末对 Pb(II)和 Ni(II)的吸附是自发的放热过程。
以鬆樹鋸末為吸附劑,研究其對水中 Pb(II)和 Ni(II)的吸附性能,研究瞭鋸末用量、攪拌速度、溶液初始 pH值等對吸附效果的影響及其吸附動力學和熱力學性能。研究結果錶明,鋸末對 Pb(II)和 Ni(II)具有良好的吸附能力。鋸末對 Pb(II)和 Ni(II)吸附過程均符閤擬二級吸附動力學模型(R2≥0.9977),鋸末吸附 Pb(II)和 Ni(II)的活化能分彆為9.8087 kJ/mol 和2.8594 kJ/mol;鋸末對 Pb(II)和 Ni(II)等溫吸附符閤 Langmuir 模型(R2≥0.9992)。熱力學研究錶明,鋸末對 Pb(II)和 Ni(II)的吸附是自髮的放熱過程。
이송수거말위흡부제,연구기대수중 Pb(II)화 Ni(II)적흡부성능,연구료거말용량、교반속도、용액초시 pH치등대흡부효과적영향급기흡부동역학화열역학성능。연구결과표명,거말대 Pb(II)화 Ni(II)구유량호적흡부능력。거말대 Pb(II)화 Ni(II)흡부과정균부합의이급흡부동역학모형(R2≥0.9977),거말흡부 Pb(II)화 Ni(II)적활화능분별위9.8087 kJ/mol 화2.8594 kJ/mol;거말대 Pb(II)화 Ni(II)등온흡부부합 Langmuir 모형(R2≥0.9992)。열역학연구표명,거말대 Pb(II)화 Ni(II)적흡부시자발적방열과정。
Sawdust was used to remove Pb(II)and Ni(II)from water as an absorbent.Effects of sawdust dosage,stir-ring speed and pH on the adsorption capacity,adsorption kinetics and thermodynamics were discussed.The results showed that sawdust had a good adsorption capacity for Pb(II)and Ni(II).The adsorption process corresponded with pseudo-second-order kinetic model (R2≥0.997 7),the activation energy were 9.808 7 kJ/mol for Pb(II)and 2.859 4 kJ/mol for Ni(II),respectively.The adsorption isotherms of Pb(II)and Ni(II)were consistent well with the Lang-muir isotherm (R2≥0.999 2).Thermodynamics analysis showed that the adsorption process was spontaneous and exo-thermic.