Meeting the increasing demand of clean water requires the development of novel efficient adsorbent materials for the removal of organic pollutants. In this context the use of natural, renewable sources is of special relevance and sepia melanin, thanks to its ability to bind a variety of organic and inorganic species, has already attracted interest for water purification. Here we describe the synthesis of a material obtained by the combination of sepia melanin and poly(ethylene-alt-maleic anhydride) (P(E-alt-MA)). Compared to sepia melanin, the resulting hybrid displays a high and fast adsorption efficiency towards methylene blue (a common industrial dye) for a wide pH range (from pH 2 to 12) and under high ionic strength conditions. It is easily recovered after use and can be reused up to three times. Given the wide availability of sepia melanin and P(E-alt-MA), the synthesis of our hybrid is simple and affordable, making it suitable for industrial water purification purposes.

中文翻译：

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棕褐色黑色素与聚（乙烯-alt-马来酸酐）杂化材料作为水净化吸附剂的制备

为了满足对清洁水日益增长的需求，需要开发用于去除有机污染物的新型高效吸附材料。在这种情况下，使用天然可再生资源具有特殊意义，而棕褐色的黑色素由于能够结合多种有机和无机物种，已经引起人们对水净化的兴趣。在这里，我们描述了由棕褐色黑色素和聚（乙烯-alt-马来酸酐）（P（E-alt-MA））组合而成的材料的合成。与棕褐色黑色素相比，所得杂化物在宽pH范围（pH 2至12）和高离子强度条件下，对亚甲基蓝（一种常见的工业染料）显示出高而快速的吸附效率。使用后易于回收，最多可重复使用3次。