CAJ | 학술논문

以染料废水处理用盐泥吸附剂的开发为目的,在静态吸附条件下,研究了含镁盐泥对直接大红、直接深蓝和直接黑3种直接染料的吸附行为,并对吸附过程的热力学进行了分析.结果表明,吸附平衡数据都能够较好地符合Langmuir和Freundlich吸附等温方程,但Langmuir方程能够更好地描述吸附等温线.在25～30℃范围内,3种直接染料在盐泥上的吸附是一个吸热过程,同时伴随着熵值的增加,反应的吉布斯自由能变小.吸附是物理和化学吸附并存的吸附过程,主要推动力为化学键力(化学吸附),同时可能存在范德华力(物理吸附),吸附焓变在74.120～87.332 kJ/mol之间.
이염료폐수처리용염니흡부제적개발위목적,재정태흡부조건하,연구료함미염니대직접대홍、직접심람화직접흑3충직접염료적흡부행위,병대흡부과정적열역학진행료분석.결과표명,흡부평형수거도능구교호지부합Langmuir화Freundlich흡부등온방정,단Langmuir방정능구경호지묘술흡부등온선.재25～30℃범위내,3충직접염료재염니상적흡부시일개흡열과정,동시반수착적치적증가,반응적길포사자유능변소.흡부시물리화화학흡부병존적흡부과정,주요추동력위화학건력(화학흡부),동시가능존재범덕화력(물리흡부),흡부함변재74.120～87.332 kJ/mol지간.
A new type of adsorbent was prepared from salt sludge.Adsorptions of three direct dyes in aqueous solutions on the salt sludge adsorbent were studied under static conditions.The thermodynamic of the adsorptions were also analyzed.Equilibrium data fitted well with Langmuir and Freundlich model in the range of 200～600 mg/L.The Langmuir isotherm model appeared to fit the isotherm data better than the Freundlich isotherm model.The adsorption of the salt sludge was endothermic in nature and was accompanied with an increase in entropy and a decrease in gibbs energy in the range of 25～35℃.The numerical values of sorption gibbs energy (74.1 20～87.332 kJ/mol)suggested that the adsorption behavior may be dominated by chemical bond forces (chemical adsorption),and accompanied with van der Waals forces(physical adsorption).