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首页> 外文期刊>Environmental Science and Pollution Research >Removal of malachite green dye from wastewater by-different organic acid-modified natural adsorbent: kinetics, equilibriums, mechanisms, practical application, and disposal of dye-loaded adsorbent
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Removal of malachite green dye from wastewater by-different organic acid-modified natural adsorbent: kinetics, equilibriums, mechanisms, practical application, and disposal of dye-loaded adsorbent

机译：用有机酸改性的天然吸附剂去除废水中的孔雀石绿染料：动力学，平衡，机理，实际应用和染料负载吸附剂的处理

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摘要

Natural adsorbent {Cinnamomum camphora sawdust) modified by organic acid (oxalic acid, citric acid, and tartaric acid) was investigated as a potential adsorbent for the removal of hazardous malachite green (MG) dye in aqueous media in a batch process. The extent of MG adsorption onto modified sawdust increased with increasing organic acid concentrations, pH, contact time, and temperature but decreased with increasing adsorbent dosage and ionic strength. Kinetic study indicated that the pseudo-second-order kinetic model could best describe the adsorption kinetics of MG. Equilibrium data were found to fit well with the Langmuir model, and the maximum adsorption capacity of the three kinds of organic acid-modified sawdust was 280.3, 222.8, and 157.5 mg/g, respectively. Thermodynamic parameters suggested that the sorption of MG was an endothermic process. The adsorption mechanism, the application of adsorbents in practical wastewater, fee prediction of single-stage batch adsorption system, and the disposal of depleted adsorbents were also discussed.
机译：研究了用有机酸（草酸，柠檬酸和酒石酸）改性的天然吸附剂（樟木锯末）作为一种潜在的吸附剂，可以分批去除水性介质中的危险孔雀绿（MG）染料。 MG吸附在改性木屑上的程度随有机酸浓度，pH，接触时间和温度的增加而增加，但随吸附剂剂量和离子强度的增加而降低。动力学研究表明，拟二级动力学模型可以最好地描述MG的吸附动力学。发现平衡数据与Langmuir模型非常吻合，三种有机酸改性木屑的最大吸附容量分别为280.3、222.8和157.5 mg / g。热力学参数表明，MG的吸附是一个吸热过程。还讨论了吸附机理，吸附剂在实际废水中的应用，单级间歇吸附系统的费用预测以及耗尽吸附剂的处理。

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