Precipitation and adsorption during fluoride removal from water by calcite in the presence of acetic acid
作者： A. Ben Nasr , K. Walha , F. Puel , D. Mangin , R. Ben Amar
DOI: 10.1080/19443994.2013.799441
关键词:
摘要: Defluoridation of groundwater is major concern in several places around the world, such as North and East Africa, India China. In this paper, removal fluoride from model solutions a Tunisian sample was performed using calcite particles presence acetic acid batch experiments. After 1 h decantation, dead-end microfiltration further used to retain fluorite (CaF2) precipitates present supernatant. At 5 mg L-1 concentration, efficiency found increase 17.4% without 30.4% with 0.1 M acid. The mainly attributed renewal area available for adsorption on particles. concentration 50 L-1, equal 9.5% 94.3% addition precipitation result higher supersaturation solution. Optimum parameters were selected defluoridation initial 2.7 L-1. final F- after treatment 1.2 which below standard World Health Organisation. Keywords
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