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海藻酸钠改性材料对废水中As(III)、Pb(II)和Zn(II)的吸附

Adsorption of As(III), Pb(II), and Zn(II) from Wastewater by Sodium Alginate Modified Materials.

作者信息

Li Hongchuan, Jin Rui, Hu Hongxiang, Kianpoor Kalkhajeh Yusef, Zhao Yingying, Gao Yue, Zhang Borui

机构信息

School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China.

出版信息

J Anal Methods Chem. 2021 Sep 23;2021:7527848. doi: 10.1155/2021/7527848. eCollection 2021.

DOI:10.1155/2021/7527848
PMID:34603816
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8486504/
Abstract

Sodium alginate (SA), polyvinyl oxide (PEO), and ceramic nanomaterials were used to prepare alginate composite gel. The present study examined the removal rate and adsorption capacity of alginate composite gel for removal of wastewater As(III), Pb(II), and Zn(II). Batch experiments were conducted to study the influence of experimental parameters such as pH and temperature, as well as the mechanism of As(III), Pb(II), and Zn(II) adsorption with the new adsorbent. The results showed the high efficiency of sodium alginate composite gel for removal of wastewater As(III), Pb(II), and Zn(II). Under the condition of the best liquid-solid ratio and the contact time, the removal rates of As(III), Pb(II), and Zn(II) were 67.42%, 95.31%, and 93.96%, respectively. The pseudo-second-order kinetic equation was superior to fit the adsorption kinetics process. The isothermal adsorption models of As(III) and Pb(II) fitted well with the Freundlich model, and Zn(II) fitted well with the Langmuir model. The results of SEM, EDS, XPS, and FTIR analyses revealed that the adsorption process occurred mainly via chemisorption. The results of the present study suggest that new adsorbents can be effectively utilized for As(III), Pb(II), and Zn(II) removal from water.

摘要

海藻酸钠（SA）、聚乙烯氧化物（PEO）和陶瓷纳米材料被用于制备海藻酸盐复合凝胶。本研究考察了海藻酸盐复合凝胶对废水中As(III)、Pb(II)和Zn(II)的去除率及吸附容量。进行了批量实验以研究pH和温度等实验参数的影响，以及新型吸附剂对As(III)、Pb(II)和Zn(II)的吸附机制。结果表明海藻酸钠复合凝胶对去除废水中的As(III)、Pb(II)和Zn(II)具有高效性。在最佳液固比和接触时间条件下，As(III)、Pb(II)和Zn(II)的去除率分别为67.42%、95.31%和93.96%。准二级动力学方程更适合拟合吸附动力学过程。As(III)和Pb(II)的等温吸附模型与Freundlich模型拟合良好，Zn(II)与Langmuir模型拟合良好。扫描电子显微镜（SEM）、能谱分析（EDS）、X射线光电子能谱（XPS）和傅里叶变换红外光谱（FTIR）分析结果表明，吸附过程主要通过化学吸附发生。本研究结果表明，新型吸附剂可有效用于去除水中的As(III)、Pb(II)和Zn(II)。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f3a/8486504/b22698b129e1/JAMC2021-7527848.012.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f3a/8486504/b22698b129e1/JAMC2021-7527848.012.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f3a/8486504/0dc93d87a214/JAMC2021-7527848.001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f3a/8486504/ea44c514477d/JAMC2021-7527848.002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f3a/8486504/8452c5084f0d/JAMC2021-7527848.003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f3a/8486504/375ade26bd46/JAMC2021-7527848.004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f3a/8486504/1a2bf31663b0/JAMC2021-7527848.005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f3a/8486504/70bbbb19ced5/JAMC2021-7527848.006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f3a/8486504/4f18f6f3962f/JAMC2021-7527848.007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f3a/8486504/647ee38a208e/JAMC2021-7527848.008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f3a/8486504/7851a1774ac3/JAMC2021-7527848.009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f3a/8486504/71b94e79523c/JAMC2021-7527848.010.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6f3a/8486504/b22698b129e1/JAMC2021-7527848.012.jpg

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