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首页> 外文期刊>Environmental Research, Engineering and Management >Arsenate Adsorption Mechanism on Nano-ball Allophane by Langmuir Adsorption Equation
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Arsenate Adsorption Mechanism on Nano-ball Allophane by Langmuir Adsorption Equation

机译：朗格缪尔吸附方程对砷纳米球吸附砷的机理

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Arsenic is considered as the synonym of death. High toxicity of arsenic in nature is a worldwide problem and often referred to as 20th -21st century calamity. High arsenic concentration has been reported recently from USA, China, Chile, Bangladesh, Taiwan, Mexico, Argentina, Poland, Canada, Hungry, Japan and India. Among all the countries Bangladesh and West Bengal of India are at the high risk. Thus arsenic disposal became an important task. In the present study an attempt is made to study the adsorption of toxic arsenic on allophanes.The adsorption of arsenate on a low Si/Al ratio allophane (KyP) was found to be very effective in reducing the amount of arsenic below the toxic level. The examination of adsorption isotherm of arsenate on allophane by Langmuir theory indicated that arsenate adsorption increased with the increasing bulk solution concentration. The observed increase in the pH can be attributed to the ligand exchange on allophane. Aluminol groups, Al-OH or Al-OH2, on allophane are responsible for the adsorption in soil.
机译：砷被认为是死亡的代名词。砷的高毒性自然是一个世界性的问题，通常被称为20-21世纪的灾难。最近，美国，中国，智利，孟加拉国，台湾，墨西哥，阿根廷，波兰，加拿大，饥饿，日本和印度都报告了高砷浓度。在所有国家中，孟加拉国和印度西孟加拉邦处于高风险之中。因此，砷的处置成为一项重要的任务。在本研究中，人们试图研究有毒砷在别铝烷上的吸附。砷在低Si / Al比别铝烷（KyP）上的吸附对于将砷的量降低到毒性水平以下非常有效。兰格缪尔（Langmuir）理论研究了砷酸盐在别铝烷上的吸附等温线，结果表明，随着溶液浓度的增加，砷酸盐的吸附量增加。观察到的pH升高可归因于在别铝烷上的配体交换。铝脲烷上的铝铝基团Al-OH或Al-OH2负责土壤中的吸附。

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