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Pb2+ adsorption by ethylenediamine-modified pectins and their adsorption mechanisms.
Carbohydrate Polymers ( IF 10.7 ) Pub Date : 2020-01-25 , DOI: 10.1016/j.carbpol.2020.115911 Rui-Hong Liang 1 , Ya Li 1 , Li Huang 2 , Xue-Dong Wang 1 , Xiao-Xue Hu 1 , Cheng-Mei Liu 1 , Ming-Shun Chen 1 , Jun Chen 1
Carbohydrate Polymers ( IF 10.7 ) Pub Date : 2020-01-25 , DOI: 10.1016/j.carbpol.2020.115911 Rui-Hong Liang 1 , Ya Li 1 , Li Huang 2 , Xue-Dong Wang 1 , Xiao-Xue Hu 1 , Cheng-Mei Liu 1 , Ming-Shun Chen 1 , Jun Chen 1
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Ethylenediamine-modified pectins (EPs) with different degrees of amidation (DA) were prepared and characterized by Fourier Transform Infrared spectra (FTIR), elemental analysis, X-ray photoelectron spectroscopy (XPS). The prepared EPs were then used to remove Pb2+ from the aqueous solution. It was found that EPs with the highest DA (EP48) exhibited great removal efficiency of Pb2+ (≥94 %) at low concentrations of 40-80 mg/L. The zeta potential analysis showed that EP48 had the fastest increase in zeta potential when Pb2+ was continuously added and was the first to be electroneutralized. Particle size analysis further confirmed that EP48 was the first precipitated and formed a larger EP48-Pb2+ complex. The FTIR and XPS analyses indicated that Pb2+ was adsorbed via the ion exchange of carboxylic groups and chelation with acylamino and amino groups. These results suggested that the EP48 might be a promising adsorbent for the removal of low concentrations of Pb2+ in contaminated water.
中文翻译：
乙二胺改性果胶对Pb2 +的吸附及其吸附机理。
制备了具有不同酰胺化度（DA）的乙二胺改性果胶（EPs），并通过傅立叶变换红外光谱（FTIR），元素分析，X射线光电子能谱（XPS）对其进行了表征。然后将制备的EP用于从水溶液中去除Pb2 +。发现最高DA（EP48）的EP在40-80 mg / L的低浓度下表现出很高的Pb2 +（≥94％）去除效率。ζ电位分析表明，当连续添加Pb2 +时，EP48的ζ电位增加最快，并且是第一个被电子中和的。粒度分析进一步证实，EP48首先沉淀并形成较大的EP48-Pb2 +复合物。FTIR和XPS分析表明，Pb2 +通过羧基的离子交换以及与酰氨基和氨基的螯合被吸附。
更新日期：2020-01-26
中文翻译：
乙二胺改性果胶对Pb2 +的吸附及其吸附机理。
制备了具有不同酰胺化度（DA）的乙二胺改性果胶（EPs），并通过傅立叶变换红外光谱（FTIR），元素分析，X射线光电子能谱（XPS）对其进行了表征。然后将制备的EP用于从水溶液中去除Pb2 +。发现最高DA（EP48）的EP在40-80 mg / L的低浓度下表现出很高的Pb2 +（≥94％）去除效率。ζ电位分析表明，当连续添加Pb2 +时，EP48的ζ电位增加最快，并且是第一个被电子中和的。粒度分析进一步证实，EP48首先沉淀并形成较大的EP48-Pb2 +复合物。FTIR和XPS分析表明，Pb2 +通过羧基的离子交换以及与酰氨基和氨基的螯合被吸附。
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