制革固体废弃物制备活性炭及其在制革废水处理中的应用。
Preparation and characterization of activated carbon produced from tannery solid waste applied for tannery wastewater treatment.
机构信息
Laboratory for Leather and Environmental Studies (LACOURO), Chemical Engineering Post-Graduated Program (PPGEQ), Federal University of Rio Grande do Sul (UFRGS), Av. Luiz Englert s/n°, Porto Alegre, RS, 90040-040, Brazil.
Chemical Engineering Post-Graduated Program (PPGEQ), Federal University of Rio Grande do Sul (UFRGS), Av. Luiz Englert s/n°, Porto Alegre, RS, 90040-040, Brazil.
出版信息
Environ Sci Pollut Res Int. 2019 Mar;26(7):6811-6817. doi: 10.1007/s11356-019-04161-x. Epub 2019 Jan 11.
The removal of toxic compounds (azo dyes) from dyeing wastewater was investigated by an environmentally friendly activated carbon produced from solid waste generated in the tannery process, the cattle hair (CHW), activated with HPO (AC-CHW), suggesting a life cycle extension for this material from leather processing. Preliminary tests with aqueous solutions containing Acid Brown 414 (AB-414) and Acid Orange 142 (AO-142) removed 71.06% and 73.05%, respectively. The activated carbon was characterized by zeta potential (ZP), functional groups (FTIR), elemental composition, sorbent specific surface area, and pore size distribution (BET/BJH). The specific surface area showed low values when compared to commercial activated carbon, but average pore diameter was higher, which facilitates the adsorption of larger and complex molecules, such as those present in real wastewaters. Through SEM and FTIR, the presence of the toxic compounds studied in the AC-CHW after sorption process was observed, where the results indicated that the functional groups of -CH=CH- participated in the removal process for these compounds. The removal efficiency obtained with AC-CHW was 51.94% and 49.73% for the dyeing wastewater containing AB-414 and AO-142, respectively. The obtained results open a promising via to use AC-CHW as efficient eco-friendly sorbent for the treatment of leather wastewater.
用制革过程中产生的固体废弃物——牛毛（CHW）经 HPO 活化制备的环保型活性炭（AC-CHW）处理染色废水中的有毒化合物（偶氮染料），这为该材料在皮革加工中的生命周期延长提供了一种方法。用含酸性棕 414（AB-414）和酸性橙 142（AO-142）的水溶液进行初步试验，分别去除了 71.06%和 73.05%。用 ζ 电位（ZP）、官能团（FTIR）、元素组成、比表面积和孔径分布（BET/BJH）对活性炭进行了表征。与商业活性炭相比，比表面积值较低，但平均孔径较高，这有利于吸附较大和复杂的分子，如实际废水中存在的分子。通过 SEM 和 FTIR，观察到在 AC-CHW 吸附后研究的有毒化合物的存在，结果表明-CH=CH-官能团参与了这些化合物的去除过程。用 AC-CHW 处理含 AB-414 和 AO-142 的染色废水的去除效率分别为 51.94%和 49.73%。研究结果为利用 AC-CHW 作为高效环保的皮革废水处理吸附剂开辟了一条有前景的途径。
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