Ravichandran P, Sugumaran P, Seshadri S, Basta Altaf H
Shri AMM Murugappa Chettiar Research Centre (MCRC), Taramani, Chennai 600 113, Tamil Nadu, India.
National Research Centre, Cellulose and Paper Department, El-Bohousse Street, Dokki 12622, Cairo, Egypt.
R Soc Open Sci. 2018 Jul 11;5(7):171578. doi: 10.1098/rsos.171578. eCollection 2018 Jul.
This work deals with optimizing the conditions of pyrolysis and type of activator to upgrade the use of fruit waste (CFW) as available and a potential precursor, in production of activated carbon (AC). In this respect, the route of activation was carried out through one- and two-step pyrolysis processes, using different chemical activating agents, such as HPO, KOH and ZnCl. The performance of the CFW-based ACs is assessed by estimating the physico-chemical characteristics (pH, electrical conductivity, bulk density and hardness), surface morphology and scanning electron microscopy, together with carbon yield, surface area and adsorption performance of pollutants in aqueous medium (methylene blue, iodine and molasses colour removal efficiencies). The results show that the two-step activation process was more effective than one-step activation for providing high adsorption performance CFW-based ACs. The maximum Brunauer-Emmett-Teller surface area 547.89 mg was produced by using HPO activating agents, and applied two-step pyrolysis. According to the American Water Work Association and based on bulk density of the investigated ACs, we recommend that most of produced ACs are suitable for treating waste water.
这项工作致力于优化热解条件和活化剂类型，以提升水果废料（CFW）作为可用且潜在前驱体在活性炭（AC）生产中的利用。在这方面，活化途径通过一步和两步热解过程进行，使用不同的化学活化剂，如HPO、KOH和ZnCl。基于CFW的活性炭的性能通过评估其物理化学特性（pH值、电导率、堆积密度和硬度）、表面形态和扫描电子显微镜，以及碳产率、表面积和在水介质中对污染物的吸附性能（亚甲基蓝、碘和糖蜜脱色效率）来进行评估。结果表明，两步活化过程在提供具有高吸附性能的基于CFW的活性炭方面比一步活化更有效。使用HPO活化剂并采用两步热解产生了最大的布鲁诺尔-埃米特-特勒表面积547.89mg。根据美国水行业协会并基于所研究活性炭的堆积密度，我们建议大多数生产的活性炭适用于处理废水。
