【摘要】 以新疆电气石为原料,通过原子荧光光谱仪、原子吸收分光光度研究电气石的不同粒度、用量、吸附时间、热处理温度等对水中Cu2+,As(Ⅲ)吸附的影响;进而探讨分析电气石的吸附机理。研究结果表明:(1)电气石对Cu2+,As(Ⅲ),F-离子的去除率随着电气石粒径的减小而增加。随着电气石用量的增加,去除率逐渐提高,增至一定值后下降。热处理温度为300℃,500℃时,可提高电气石吸附Cu2+,As(Ⅲ)的效率。加热预处理未改善电气石对F-离子吸附能力。(2)电气石对带电性质不同的阴、阳离子都具有较好的吸附作用。电气石的极性和表面性质使其对离子可能存在络合吸附和静电吸附两种形式。电气石对Cu2+,As(Ⅲ)吸附为表面络合吸附与静电吸附共同作用,吸附效果好。对F-吸附只存在静电吸附,吸附效果差。更多还原

【Abstract】 The mineral of tourmaline played an important role in protecting environment and keeping human being health,due to its spontaneous polarity under room temperature.By using atom fluorescence spectrograph,atom adsorption spectrophotometer, this paper discussed the effects of grain size,dosage,adsorption time,heat treatment temperature of tourmaline from Xinjiang on the adsorption Cu2+,As(Ⅲ),F-and probed into the ion adsorption mechanism of tourmaline.The results of study indicated:(1) The tourmaline adsorptive ratio on Cu2+,As(Ⅲ),F-in waste water increased along with the reduction of tourmaline grain size,and also along with increase of tourmaline powder added in waste water until reaching certain quantity.Heat treatment under 300 ℃ and 500 ℃ can improve the tourmaline adsorptive ratio on Cu2+ and As(Ⅲ) in waste water,but little effect on F-.(2) Tourmaline has a good capability in adsorbing ions and anions.Due to its electro-polarity and surface properties,tourmaline has two ways to adsorb ions,namely the surface and static adsorptions.tourmaline adsorption on F-is a kind of weak static one.更多还原