Two functionalized nano-adsorbents were prepared by modifying carbon nanotubes and graphene oxide with active carboxyl groups, and used to remove Pb(II) heavy metal ions in aqueous solutions. The adsorbent combines the advantages of the active groups that can easily capture heavy metal ions and the high specific surface area of nanomaterials, has high adsorption capacity and affinity and is easily separated from the sample solution by centrifugation.

中文翻译：

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用于去除水溶液和废水中重金属离子的可回收材料的制备

通过用活性羧基修饰碳纳米管和氧化石墨烯制备了两种功能化纳米吸附剂，用于去除水溶液中的 Pb(II) 重金属离子。该吸附剂结合了活性基团容易捕获重金属离子和纳米材料高比表面积的优点，具有较高的吸附容量和亲和力，通过离心很容易从样品溶液中分离出来。