Dye pollution from industries such as dyeing, textile, leather, cosmetics and pigments is of increasing concern, calling for advanced methods of wastewater remediation. Many techniques have been applied to treat such effluents, but adsorption remains the easiest, low-cost, effective and reliable strategies. The recent development of magnetic composites combines properties of both organic and inorganic components and is thus opening new applications for color removal. Here, we review the use of magnetic nanomaterials to adsorb dyes from aqueous solutions. We present sources of water contamination, actual technologies for wastewater treatment, the impact of dyes on health and the environment, dye removal methodologies, and the advantages of magnetic separation. We also discuss nanoparticle synthesis, results on magnetic nanomaterials for dye adsorption, and adsorption models.

来自染料，纺织，皮革，化妆品和颜料等行业的染料污染问题日益引起人们的关注，这要求采用先进的废水处理方法。已经应用了许多技术来处理此类废水，但是吸附仍然是最简单，低成本，有效和可靠的策略。磁性复合材料的最新发展结合了有机和无机成分的特性，因此为除色开辟了新的应用。在这里，我们回顾了磁性纳米材料从水溶液中吸附染料的应用。我们介绍了水污染的来源，废水处理的实际技术，染料对健康和环境的影响，染料的去除方法以及磁选的优点。我们还讨论了纳米粒子的合成