en عمومى General مقاله مروری Review Article <div style="text-align: justify;"><span class="fontstyle0">Background: </span><span class="fontstyle2">Nanocomposites have received remarkable attention as effective adsorbents for removal of coexisting pollutants over the last decades. The presence of heavy metals (HMs) in wastewater has caused a global health concern. Therefore, the aim of this study was to review the most relevant publications reporting the use of nanostructures to simultaneous adsorption of HMs in mixed aqueous systems.</span><br> <span class="fontstyle0">Methods: </span><span class="fontstyle2">In this systematic review, 9 studies were included through a systematic search in the three databases (ISI, Scopus, and PubMed) during 1990-2021. The optimal value of simultaneous adsorption parameters such as initial concentration, contact time, adsorbent dosage, and pH was discussed.</span><br> <span class="fontstyle0">Results: </span><span class="fontstyle2">Findings indicate that the Langmuir and Freundlich models and the pseudo-second-order kinetic model have been widely used and the most popular models to describe the equilibrium of HMs by nanoadsorbents. This study confirmed that the simultaneous removal rate of HMs decreased with an increase in pH value. It was found that the major mechanisms of HMs adsorption onto nanostructures were electrostatic interactions and precipitation.</span><br> <span class="fontstyle0">Conclusion: </span><span class="fontstyle2">Nanocomposites have remarkable adsorption performance for HMs with the highest adsorption capacity (qe(mg/g)).</span></div> Adsorption, Wastewater, Heavy metals, Nanocomposites, Kinetics 9 14 http://ehemj.com/browse.php?a_code=A-10-1-230&slc_lang=en&sid=1 Seyyed Abbas Mirzaee mirzaee.seyyed@gmail.com 10031947532846009822 10031947532846009822 No Health and Environment Research Center, Ilam University of Medical Sciences, Ilam, Iran Neemat Jaafarzadeh n.jaafarzade@yahoo.com 10031947532846009823 10031947532846009823 No Department of Environmental Health Engineering, Faculty of Health, Ilam University of Medical Sciences, Ilam, Iran Susana Silva Martinez ssilva@uaem.mx 10031947532846009824 10031947532846009824 No Center for Research in Engineering and Applied Sciences, UAEM, Av. Universidad 1001, Col. Chamilpa, Cuernavaca, Morelos, Mexico Zahra Noorimotlagh noorimotlagh.zahra@ gmail.com 10031947532846009825 10031947532846009825 Yes Corresponding author: Health and Environment Research Center, Ilam University of Medical Sciences, Ilam, Iran