【摘要】：采用十八烷基三甲基氯化銨(OTAC)對(duì)凹凸棒石(ATP)進(jìn)行有機(jī)改性,并負(fù)載納米鐵(nZVI)制備復(fù)合材料nZVI/OTAC/凹石(nZVI/OTAC/ATP)。利用掃描電鏡對(duì)改性凹石負(fù)載納米鐵的條件進(jìn)行優(yōu)化,研究了BPA在復(fù)合材料上的吸附特性,考察了材料投加量、初始濃度、pH等因素對(duì)吸附的影響,實(shí)驗(yàn)結(jié)果表明:隨著初始BPA質(zhì)量濃度、復(fù)合材料投加量及溶液pH值的增加,nZVI/OTAC/ATP對(duì)BPA的吸附量逐漸減少;在nZVI/OTAC/ATP投加量為1.0 g/L、溶液pH為6.0、初始BPA質(zhì)量濃度為20 mg/L、吸附溫度為25℃的條件下,吸附量最高為13.4 mg/g。吸附BPA的等溫曲線符合BET模型和Freundlich模型,為多層吸附。此外,復(fù)合材料采用加熱溶液浸泡法具備一定的再生能力。
[Abstract]:The organically modified attapulgite (ATP) was prepared by octadecyl trimethyl ammonium chloride (OTAC), and the composite nZVI/OTAC/ concave stone (nZVI/OTAC/ATP) was prepared by loading nano-iron (nZVI). The adsorption characteristics of BPA on composite materials were studied by SEM. The effects of dosage, initial concentration, pH and other factors on the adsorption were investigated. The experimental results show that the amount of BPA adsorbed by nZVI/OTAC/ATP decreases with the increase of the initial BPA concentration, the dosage of the composite and the pH value of the solution. When the dosage of nZVI/OTAC/ATP is 1.0 g / L, the solution pH is 6.0, and the initial mass concentration of BPA is 20 mg/L, the adsorption temperature is 25 鈩，

本文編號(hào)：2413759