DEVELOPMENT OF ACTIVATED CARBON FROM BAMBOO (Bambusa vulgaris) FOR PESTICIDE REMOVAL FROM AQUEOUS SOLUTIONS

ABSTRACT Considering the water scarcity problems facing many countries, the need for water reuse can make activated carbon (AC) an essential product for modern society. In this context, to contribute with better activated carbons that could be used to serve in water treatment, this article discusses these materials production, using bamboo as raw material, and analyses their application effectiveness. The bamboo was collected, transformed into activated carbon, by simultaneous chemical and physical activations, and named H3PO4/H2OAC. The obtained material was characterized by its yield, apparent density, ash content, thermogravimetric analysis, surface area, methylene blue and iodine indexes, pH and point of zero charge analysis, scanning electron microscopy and Boehm titration method. The AC was used as adsorbent for removing the metribuzin, 2,4-dichlorophenoxyacetic acid and furadan pesticides. The H3PO4/H2OAC had a surface area of 1196.30 m².g-1 and the obtained adsorption capacity was elevated for furadan (868.98 mg.g-1), metribuzin (756.47 mg.g-1) and 2,4-dichlorophenoxyacetic acid (274.70 mg.g-1).

摘要 鉴于诸多国家面临的水资源短缺问题，水回用的需求使得活性炭（activated carbon, AC）成为现代社会不可或缺的产品。在此背景下，为制备可应用于水处理的优质活性炭材料，本文以竹子为原料开展该类材料的制备研究，并对其应用效果进行分析。研究人员采集竹子原料，通过化学与物理联合活化法制备得到活性炭，并将其命名为H3PO4/H2OAC。对所制得的活性炭材料，通过产率、表观密度、灰分含量、热重分析、比表面积、亚甲基蓝吸附值与碘吸附值、pH值及零电荷点测定、扫描电子显微镜（scanning electron microscopy, SEM）和Boehm滴定法进行了系统表征。将该活性炭作为吸附剂，用于去除嗪草酮（metribuzin）、2,4-二氯苯氧乙酸（2,4-dichlorophenoxyacetic acid）和呋喃丹（furadan）三种农药。该H3PO4/H2OAC的比表面积可达1196.30 m²·g⁻¹，对呋喃丹、嗪草酮与2,4-二氯苯氧乙酸的吸附容量分别达到868.98 mg·g⁻¹、756.47 mg·g⁻¹和274.70 mg·g⁻¹，吸附性能优异。