摘要
本文研究了水溶液中活性炭吸附Ｚｎ２＋的热力学特性及其机理，测定了不同温度下的吸附等温线。结果表明：在稀溶液中吸附Ｚｎ２＋符合Ｌａｎｇｍｕｉｒ模型；活性炭吸附Ｚｎ２＋时可能主要是以水合Ｚｎ（Ｈ２Ｏ）２＋ｎ形式被吸附的；活性炭表面存在含氧官能团的吸附活性中心；由于吸附水合Ｚｎ２＋与炭表面含氧官能团之间相互作用，导致水分子的脱附及Ｈ＋的产生，使其热力学函数ΔＳ０增加。
The thermodynamic characteristics and the mechanism of Zn2+adsorption by activated carbon in aqueous solution were studied and the adsorption isotherm line at different temperature were delermined in this paper. the results showed that the Zn2+adsorption in dilute solution can coincide with the Langmuir model; Zn2+ is adsorbed by activated carbon mainly in the form of hyarated Zn(H2O)2+n;the adsorption activation center of oxygen-containing function group existed in activate carbon surface; owing to the interaction between adsorption hydrated Zn2+ and oxygen-containing function group on carbon surface, the desorbing of water molecules and H+ formation make the thermodynamic function S0 increasing.
出处
《水处理技术》
CAS
CSCD
1999年第2期103-107,共5页
Technology of Water Treatment
关键词
活性炭
吸附热力学
锌离子
机理
水溶液
activated carbon, adsorption Zn2+, adsorption thermodynamics
