In this work, the surface of commercial activated carbon was modified with the copper sulfate salt by impregnation method, aiming at the removal of reduced sulfur compounds from aqueous media. The materials were characterized by X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy with energy dispersion spectroscopy, and using nitrogen gas as adsorbent, the apparent specific surface areas were determined. In addition, the semiquantitative analysis to explore the surface area was performed using methylene blue a ‘molecular probe.’ For the adsorption, was used l-cysteine as the model adsorbate. After the impregnation of activated carbon, the presence of copper in the forms of copper oxide and metallic copper was confirmed. The mapping of functional groups demonstrated the carbonaceous characteristic of the material. The photomicrographs showed crystals on the surface of the activated carbon impregnated with copper and revealed a copper atomic content of 16.8% w/w. However, the impregnation caused a reduction in the apparent specific surface, probably due to the clogging of the pores with the impregnation salt. On the other hand, the results of adsorption tests showed an increase in l-cysteine removal with impregnation, ranging from 76 to 93%. The results suggest that the adsorbent impregnated with copper is considered promising for the removal of compounds with reduced sulfur.

在这项工作中，通过浸渍法用硫酸铜盐对商用活性炭的表面进行了改性，目的是从水性介质中去除还原的硫化合物。通过X射线衍射，傅里叶变换红外光谱和具有能谱的扫描电子显微镜对材料进行表征，并以氮气为吸附剂，确定了表观比表面积。另外，使用亚甲基蓝“分子探针”进行了探索表面积的半定量分析。为了吸附，使用了l-半胱氨酸作为模型吸附物。浸渍活性炭后，确认了以氧化铜和金属铜形式存在的铜。官能团的映射证明了该材料的碳质特征。显微照片显示，在浸渍有铜的活性炭表面上存在晶体，并且发现铜原子含量为16.8％w / w。然而，浸渍可能导致表观比表面积的降低，这可能是由于孔被浸渍盐堵塞所致。在另一方面，吸附试验的结果显示，增加升浸渍去除半胱氨酸，范围从76％到93％。结果表明，浸渍有铜的吸附剂被认为有望去除硫含量降低的化合物。