吸附
砷
动力学
环境化学
化学
热力学
有机化学
物理
量子力学
作者
Farah Shahirah Mohd Fairuz,Noor Zuhartini Md Muslim,Wan Nazwanie Wan Abdullah,Norshahidatul Akmar Mohd Shohaimi,Nor Hakimin Abdullah,Ahmad Zamani Ab Halim,Nurasmat Mohd Shukri,Nur Fatien Muhamad Salleh
出处
期刊:Langmuir
[American Chemical Society]
日期:2024-09-11
标识
DOI:10.1021/acs.langmuir.4c02309
摘要
The contamination of water sources with the heavy metal contaminant arsenic (As) causes substantial risks to humans, animals, and other living organisms. Therefore, the introduction of methods for the removal of As is important. The present study aimed to investigate the adsorption model and mechanism of As removal utilizing natural soil adsorbents. The batch adsorption technique was used to analyze the impacts of various parameters such as contact time, initial As concentration, pH, and temperature. Adsorption mechanisms were studied through adsorption kinetic, isotherm, and thermodynamic models. The batch adsorption study findings indicate that the optimal conditions for maximum As removal were achieved by application of 2.2 g of adsorbents in 50 μg/L of As solution for 60 min of contact time at a pH of 5.5 ± 0.5 and a temperature of 40 °C. The highest removal efficiency was achieved when red soil was employed as the adsorbent. The kinetic, isotherm, and thermodynamic models revealed that As adsorption was a chemisorptive, nonspontaneous, and endothermic process.
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