Pant Bishnu Datt, Adhikari Sangita, Shrestha Nabina, Baral Janaki, Paudyal Hari, Ghimire Kedar Nath, Pokhrel Megh Raj, Poudel Bhoj Raj
Department of Chemistry, Tri-Chandra Multiple Campus, Tribhuvan University, Kathmandu, 44600, Nepal.
Central Department of Chemistry, Tribhuvan University, Kathmandu, 44618, Nepal.
Heliyon. 2024 Sep 3;10(17):e37382. doi: 10.1016/j.heliyon.2024.e37382. eCollection 2024 Sep 15.
The occurrence of arsenic in the surroundings raises apprehension because its detrimental impacts on both human health and the ecology. Since adsorption is an effective, affordable method that can be adjusted to specific environmental circumstances, it is a sustainable solution for the removal of arsenic from the aquatic environment. Utilizing biomass that has been chemically activated may be a viable way to increase the adsorption capacity of the material, reduce arsenic pollution, and protect the environment and human health. In the proposed research, Fe(III) loaded saponified peel (Fe(III)-SPGP) has been synthesized to remove arsenic from aqueous solutions. FTIR and SEM analysis were utilized to carry out the characterization of the biosorbents. Batch experiments were carried out by altering several factors including pH and contact time, in addition to initial concentration and desorption. The most effective pH for As(III) adsorption using Fe(III)-SPGP was discovered to be 9.0. After determining that a pseudo-second-order kinetic model was the one that provided the greatest fit for the results of the experiment, the model developed by Langmuir was applied. It was discovered that the maximum adsorption of As(III) that could be adsorbed by Fe(III)-SPGP was 63.29 mg/g. The spent biosorbent may easily be reused again in subsequent applications. Based on these findings, Fe(III)-SPGP shows promise as a cheap effective sorbent for excising contaminants of As(III).
周围环境中砷的存在引发了人们的担忧，因为它对人类健康和生态都有不利影响。由于吸附是一种有效且经济实惠的方法，能够根据特定环境情况进行调整，因此它是从水生环境中去除砷的可持续解决方案。利用经过化学活化的生物质可能是提高材料吸附能力、减少砷污染以及保护环境和人类健康的可行途径。在本研究中，合成了负载铁（III）的皂化果皮（Fe(III)-SPGP）以从水溶液中去除砷。利用傅里叶变换红外光谱（FTIR）和扫描电子显微镜（SEM）分析对生物吸附剂进行了表征。除了初始浓度和解吸外，还通过改变包括pH值和接触时间等几个因素进行了批量实验。发现使用Fe(III)-SPGP吸附As(III)的最有效pH值为9.0。在确定伪二级动力学模型最符合实验结果后，应用了朗缪尔（Langmuir）模型。发现Fe(III)-SPGP对As(III)的最大吸附量为63.29 mg/g。用过的生物吸附剂在后续应用中可以很容易地再次使用。基于这些发现，Fe(III)-SPGP有望成为一种廉价有效的吸附剂，用于去除As(III)污染物。
