National Centre of Excellence in Analytical Chemistry, University of Sindh, Jamshoro, Pakistan.
Institute of Advanced Research Studies in Chemical Sciences, University of Sindh, Jamshoro, Pakistan.
Sci Rep. 2022 May 14;12(1):8001. doi: 10.1038/s41598-022-11574-1.
Cadmium is found in many underdeveloped countries' aquatic bodies. Therefore, contaminated water should be treated before consumption; henceforth, efficient and customized point-of-use filtration is foreseeable. Traditionally, carbon-based sorbents have been utilized for such treatments, but alternative sources are also being investigated. Hydrochars made from mango peels using a thermal activation process were employed as an adsorbent instead of activated carbon in this investigation. The prepared material was porous with active surface functionalities, and the interaction of cadmium with the surface was possibly ion-exchange in nature. The performance of a material for a candle water filtering system with a 2.5 cm internal diameter and a 30.48 cm column height was determined using the parameters acquired by the Thomas model. The material was found to be highly efficient at 453.5 L/min/Filter water, whereas 31670.6 L/min/Filter can be treated if the break point and exhaustion point are considered, respectively, as the candle replacement time. These findings indicate that activated hydrochar might be a suitable sorbent for removing cadmium ions from contaminated water.
镉在许多欠发达国家的水体中都有发现。因此，在饮用水之前应进行处理；此后，可预见的是，高效且定制化的现场过滤将成为可能。传统上，碳基吸附剂已被用于此类处理，但也在研究其他替代来源。在这项研究中，使用热激活工艺由芒果皮制成的水热炭被用作吸附剂，而不是活性炭。所制备的材料具有多孔性和活性表面官能团，镉与表面的相互作用可能具有离子交换的性质。使用 Thomas 模型获得的参数来确定内径为 2.5 厘米、柱高为 30.48 厘米的蜡烛水过滤系统中材料的性能。结果表明，该材料在 453.5 L/min/Filter 水时的效率非常高，如果分别将断点和耗尽点视为蜡烛更换时间，则可以处理 31670.6 L/min/Filter 水。这些发现表明，活化水热炭可能是一种从受污染水中去除镉离子的合适吸附剂。
