聚吡咯
刚果红
吸附
吸附
吸热过程
朗缪尔吸附模型
水溶液
化学
核化学
傅里叶变换红外光谱
化学工程
聚合
材料科学
色谱法
有机化学
聚合物
工程类
作者
Yan Wang,Rongyao Chen,Zijing Dai,Qingcai Yu,Miao Yong-mei,Ronghua Xu
出处
期刊:RSC Advances
[The Royal Society of Chemistry]
日期:2022-01-01
卷期号:12 (15): 9424-9434
被引量:23
摘要
In this study, Chinese yam peel (CYP) was modified with polypyrrole via an in situ polymerization method to remove Congo red from aqueous media. The prepared CYP-polypyrrole (CYP-PPy) composite was characterized using FTIR, SEM, TEM, XRD, TG and BET analysis. The performance of CYP-PPy towards the adsorption of Congo red (CR) was explored in batch mode. The removal efficiency of CR was found to be 86% at the initial concentration of 100 mg L-1, contact time of 120 min, and the adsorbent dosage of 10 g L-1. At equilibrium time (20 h), the removal efficiency was significantly acceptable (98.9%). The adsorption kinetics data were most consistent with the pseudo-second-order kinetic model. The adsorption equilibrium data could be described well by the Langmuir isotherm model with the maximum adsorption capacity of 86.66 mg g-1. In view of thermodynamics, the adsorption process was endothermic and more favorable for CR removal at 45 °C. A reusability study indicated that CYP-PPy could be reused effectively for up to three successive cycles of ad-/de-sorption. Hence, this work provides an alternative scheme for the targeted exploitation of agricultural waste to control dye pollution.
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