Response surface optimization of Rhodamine B dye removal using paper industry waste as adsorbent
Response surface optimization of Rhodamine B dye removal using paper industry waste as adsorbent
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DOI：
10.1007/s40090-017-0113-4
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发表时间：
2017-02
影响因子：
2.4
通讯作者：
A. Thakur;H. Kaur
中科院分区：
文献类型：
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作者：
A. Thakur;H. Kaur
本研究描述了将废物转化为有效的吸附剂及其在废水处理中的应用，即，对化学改性的造纸工业固体废弃物进行了吸附性能测试，成功地从其水溶液中去除罗丹明B染料。通过考察pH值、吸附剂用量、浓度、接触时间和温度等因素对吸附过程的影响，确定了吸附等温线、动力学和热力学参数。平衡数据已很好地描述了各种吸附等温线的基础上，即朗缪尔，Freundlich和Temkin吸附等温线。根据Langmuir等温线，已发现在308 K温度下的最大单分子层吸附容量为6.711 mg g− 1。采用准一级动力学模型、准二级动力学模型和颗粒内扩散模型对吸附动力学进行了研究，结果表明，吸附动力学符合准二级动力学模型。计算了自由能变（ΔG）、焓变（ΔH）和熵变（ΔS）等热力学参数。在308 K温度下，75 mg L− 1浓度下的自由能为−11.9452 kJ mol− 1。研究了该吸附剂的解吸和回收性能，结果表明该吸附剂具有良好的回收性能.
The present investigation describes the conversion of waste product into effective adsorbent and its application for the treatment of wastewater, i.e., chemically modified solid waste from paper industry has been tested for its adsorption ability for the successful removal of Rhodamine B dye from its aqueous solution. The adsorption isotherm, kinetics and thermodynamic parameters of process have been determined by monitoring the different parameters, such as effect of pH, amount of adsorbent dose, concentration, contact time and temperature. The equilibrium data has been well described on the basis of various adsorption isotherms, namely Langmuir, Freundlich and Temkin adsorption isotherm. From Langmuir isotherm, the maximum monolayer adsorption capacity has been found to be 6.711 mg g−1at 308 K temperature. The kinetics of adsorption has been studied using pseudo-first order, pseudo-second order and intra-particle diffusion model and the results show that kinetics has been well described by pseudo-second order. Thermodynamic parameters, such as free energy change (ΔG), enthalpy change (ΔH) and entropy change (ΔS), have been evaluated. The free energy has been obtained as −11.9452 kJ mol−1for 75 mg L−1concentration at 308 K temperature. Desorption and recycling efficiency of adsorbent has been studied and the adsorbent shows good recycling efficiency.