Abstract The main objectives of this work to elucidates the adsorption behaviour of Zn Fe LDHs impregnated OPAC (Orange Peels Activated Carbon) composite was prepared via the ultrasonic-assisted co-precipitation method and its application for the removal of phosphate and nitrate from water. The prepared composite was studied by way of FTIR, XRD, TGA, SEM, EDAX with mapping images, DSC and BET analysis. Equilibrium isotherm data of both phosphate and nitrate ions were well fitted to the Freundlich isotherm model. Thermodynamic studies shows that Zn Fe LDHs OPAC composites have a potential applicant for the removal of phosphate and nitrate from water at different temperatures. The kinetic parameters were discovered by using non-linear regression method. The regeneration study was retained up to seven cycles and 63% adsorption efficiency was observed. The applicability of Zn Fe LDHs OPAC composite at field condition was analyzed by eutrophicated water sample taken from the nearby industrial area.

中文翻译：

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新型Zn Fe LDHs-活性炭复合材料增强去除磷酸盐和硝酸根离子

摘要 本工作的主要目的是阐明Zn Fe LDHs 浸渍的OPAC（橙皮活性炭）复合材料的吸附行为，该复合材料通过超声辅助共沉淀法制备及其在去除水中磷酸盐和硝酸盐中的应用。通过 FTIR、XRD、TGA、SEM、EDAX 和映射图像、DSC 和 BET 分析对制备的复合材料进行了研究。磷酸盐和硝酸根离子的平衡等温线数据与 Freundlich 等温线模型非常吻合。热力学研究表明，Zn Fe LDHs OPAC 复合材料具有用于在不同温度下从水中去除磷酸盐和硝酸盐的潜在应用。动力学参数是通过使用非线性回归方法发现的。再生研究最多保留七个循环，并观察到 ​​63% 的吸附效率。