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首页> 外文期刊>Journal of Hazardous Materials >Removal of fluoride from drinking water using aluminum hydroxide coated rice husk ash
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Removal of fluoride from drinking water using aluminum hydroxide coated rice husk ash

机译：使用氢氧化铝包覆的稻壳灰去除饮用水中的氟化物

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摘要

Fluoride content in groundwater that is greater than the WHO limit of 1.5 mg/L, causes dental and skeletal fluorosis. In India, several states are affected with excess fluoride in groundwater. The problem is aggravated due to the lack of appropriate and user friendly defluoridation technology. Several fluoride removal techniques are reported in the literature amongst which the Nalgonda technique and use of activated alumina have been studied extensively. However a simple, efficient and cost effective technology is not available for widespread use in many affected regions. In this paper, we present a novel cost effective defluoridation method that is based on surface modification of rice husk ash (RHA) by coating aluminum hydroxide. RHA is obtained by burning rice/paddy husk which is an abundantly available and is an inexpensive raw material. The results showed excellent fluoride removal efficiency and the adsorption capacity was found to be between 9 and 10 mg/g.
机译：地下水中的氟含量超过WHO规定的1.5 mg / L，会导致牙齿和骨骼氟中毒。在印度，有几个州受到地下水中过量氟化物的影响。由于缺乏合适且用户友好的除氟技术，该问题更加严重。文献中报道了几种除氟技术，其中已广泛研究了Nalgonda技术和活性氧化铝的使用。但是，没有简单，有效和具有成本效益的技术在许多受影响的地区广泛使用。在本文中，我们提出了一种新颖的具有成本效益的脱氟方法，该方法基于稻壳灰（RHA）的表面改性，通过涂覆氢氧化铝进行。 RHA是通过燃烧稻米/稻壳而获得的，稻壳/稻壳是一种价格便宜的原料，数量丰富。结果显示优异的除氟效率，并且吸附容量为9至10mg / g。

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