Vonnie Joseph Merillyn, Li Chua Shek, Erna Kana Husna, Yin Koh Wee, Felicia Wen Xia Ling, Aqilah Md Nasir Nur', Rovina Kobun
Faculty of Food Science and Nutrition, Universiti Malaysia Sabah, Jalan UMS, Kota Kinabalu 88400, Sabah, Malaysia.
Nanomaterials (Basel). 2022 Aug 11;12(16):2750. doi: 10.3390/nano12162750.
Heavy metal contamination has spread around the world, particularly in emerging countries. This study aimed to assess the effectiveness of starch/eggshell/orange peel-activated carbon-based composite films in removing cadmium (II) ions from water samples. X-ray diffraction and scanning electron microscopy were used to characterize the composite films. The effect of Cd was studied using a UV-Vis spectrophotometer and atomic absorption spectroscopy. The morphology of the composite film reveals a highly porous and rough surface with more open channels and a non-uniform honeycomb, indicating that the film has a high potential to adsorb Cd. The diffraction peaks for this film were found to be at 13.74°, 17.45°, 18.4°, and 23.6°, indicating a typical crystalline A-type packing arrangement within the starch granules. The results indicate that crystalline structure was unaffected by the addition of eggshell powder and orange peel-activated carbon. In 0.5 mg L and 1.0 mg L Cd ions, the composite film removed 100% and 99.7% of the Cd, respectively, while the maximum removal efficiency for methylene blue was 93.75%. Thus, the current study shows that starch/eggshell/orange peel activated carbon film has a high potential for commercial activated carbon as a low-cost adsorbent.
重金属污染已在全球蔓延，尤其是在新兴国家。本研究旨在评估淀粉/蛋壳/橙皮基活性炭复合膜对水样中镉（II）离子的去除效果。采用X射线衍射和扫描电子显微镜对复合膜进行表征。使用紫外可见分光光度计和原子吸收光谱法研究镉的影响。复合膜的形态显示出高度多孔且粗糙的表面，具有更多开放通道和不均匀的蜂窝状结构，表明该膜具有高吸附镉的潜力。发现该膜的衍射峰位于13.74°、17.45°、18.4°和23.6°，表明淀粉颗粒内存在典型的结晶A型堆积排列。结果表明，蛋壳粉和橙皮基活性炭的添加未影响晶体结构。在0.5 mg/L和1.0 mg/L的镉离子溶液中，复合膜分别去除了100%和99.7%的镉，而对亚甲基蓝的最大去除效率为93.75%。因此，当前研究表明，淀粉/蛋壳/橙皮活性炭膜作为低成本吸附剂具有替代商业活性炭的巨大潜力。
