Efficient removal of Cr from aqueous solution by catechol/m-phenylenediamine nanospheres combined with Fe(Ⅱ)

Mina Luo; Chunmei Zhu; Changcheng ChenFu ChenYuanqiang ZhuXuemei Wei

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Efficient removal of Cr from aqueous solution by catechol/m-phenylenediamine nanospheres combined with Fe(Ⅱ)

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The discharge of chromium-containing wastewater in industrial production causes resource loss and damage to the ecological environment. Currently, various phenolamine materials have been used to remove chromium, but their harsh adsorption conditions bring many difficulties. For example, ideal chromium removal is only achieved at low pH. In this study, we synthesized catechol/m-phenylenediamine nanospheres (CMN) and combined CMN with Fe(ll) for Cr removal from aqueous solutions, and Fe(Ⅱ) comes from FeSO_47H_2O. CMN was characterized and analyzed by field-emission scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), transmission electron microscopy (TEM), Fourier transformed infrared (FTIR), X-ray diffraction (XRD), X-ray photoelectron (XPS). The adsorption performance was studied through a series of adsorption experiments. When C_0 = 900mg/L and pH = 6, the maximum adsorption capacity obtained in the experiment was 977.1 mg/g. It maintains excellent adsorption properties in acidic, neutral and alkaline environments. The results of the adsorption mechanism showed that the ultra-high adsorption capacity of CMN and Fe(Ⅱ) for Cr was the result of the synergistic effect of adsorption and reduction, including electrostatic attraction, reduction and coprecipitation. CMN is expected to be an ideal adsorbent for Cr removal in aqueous solution due to its low cost, high biocompati-bility and high efficiency in Cr removal.

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《Journal of environmental science and health, Part A. Toxic/hazardous substances & environmental engineering》 |2023年第10期|844-854|共11页
作者
Mina Luo; Chunmei Zhu; Changcheng ChenFu ChenYuanqiang ZhuXuemei Wei;
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作者单位

College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan, China;

College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu, Sichuan, China,Xingrong Environment Co., Ltd, Chengdu, Sichuan, China;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类环境科学、安全科学;
关键词
Catechol-amine; polymeric material; adsorption; reduction; chromium;

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Efficient removal of Cr from aqueous solution by catechol/m-phenylenediamine nanospheres combined with Fe(Ⅱ)

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