Adsorption of aqueous cadmium(II) using carbon Nanotubes treated by microwave Chemical procedure

• Main Authors: Jen-Hao Tan, 譚仁豪
• Other Authors: Chao-Yin Kuo
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/ya7z64

碩士 === 國立雲林科技大學 === 環境與安全工程系碩士班 === 96 === Abstract This research is mainly to utilize different oxidant (H2O2, KMnO4) For change quality pharmaceutical and collocate microwave heat system endure carbon nanotubes in charge of changing quality study superficial to go on to come, sense base of the heavy metal ion while making its surface favorable to the adsorbed water on collecting, and then compare it via the oxidant (H2O2, KMnO4) Change to endure the carbon nanotubes and is in charge of its basic materialization characteristic changing and research of the cadmium ion of heavy metal in the adsorbed water before and after the quality. FTIR, Boehm''s titration method and circle reach the electric potential result and show, use (H2O2, KMnO4) tendure carbon nanotubes in charge of surface include sour sense base group on connecting to make after the quality to change(-COOH, -OH) ,This sense base group contributes to improving and enduring the ability that the carbon nanotubes is in charge of absorbing the heavy metal. In absorbing the experiment, enduring the carbon nanotubes and is in charge of all having it of improving that absorbs the result on pH 2 to 12 ranges after changing qualities via H2O2, KMnO4, and it absorb Cd2+ absorbing Raw-CNTs 18.3 mg/g, H2O2-CNTs 31.7 mg/g, KMnO4-CNTs 73.78 mg/g, change quality endure carbon nanotubes in charge of adsorbed water their Cd2+ is it Pseudo-second-order equation power absorb the way to accord with all. Show result change endure carbons nanotubes in charge of not absorbing heavy metal cadmium ion of quality ΔH0, ΔS0, in order to be on the occasion of, ΔG0 is the negative value, show the course of absorbing as heat absorption ( endothermic ) , spontaneity reacts; In wait for warm to absorb way suck discussion find, change quality endure carbons nanotubes accord with Langmuir isotherm model relatively to absorb to in charge of. The experiment of absorbing after the procedure verifies, use different oxidant (H2O2, KMnO4) via the quality of changing Change to endure carbons nanotubes in charge of under different pH, temperature terms, person who absorb it rise and increase with pH, temperature all quality; So research this microwave heat procedure add oxidant(H2O2, KMnO4) Change enduring the carbons nanotubes and is in charge of contributing to improving and enduring the ability that the carbons nanotubes is in charge of absorbing the heavy metal of the quality. Keyword：carbon nanotubes, microwave, adsorption, cadmium, acid function