本文關(guān)鍵詞： 丙烯酸鹽 丙烯酰胺 水凝膠 重金屬離子 吸附　出處：《分析化學(xué)》2016年05期 　論文類型：期刊論文

【摘要】：以丙烯酸(AA)、丙烯酰胺(AM)為單體,K_2S_2O_8為引發(fā)劑,N,N'-亞甲基雙丙烯酰胺為交聯(lián)劑,采用水溶液聚合法合成P(AA-AM)水凝膠,通過(guò)正交實(shí)驗(yàn)優(yōu)化了P(AA-AM)水凝膠的制備工藝。對(duì)制備的P(AA-AM)水凝膠進(jìn)行了SEM和XPS分析,探討了P(AA-AM)水凝膠對(duì)Cu~(2+)、Pb~(2+)、Zn~(2+)和Cd~(2+)的吸附等溫線和吸附動(dòng)力學(xué)行為,研究了P(AA-AM)水凝膠的粒徑、吸附溫度、p H值和重金屬離子的初始濃度對(duì)P(AA-AM)水凝膠吸附性能的影響。實(shí)驗(yàn)結(jié)果表明,所制備的P(AA-AM)水凝膠是一種具有三維網(wǎng)絡(luò)結(jié)構(gòu)的高分子材料,其表面的氨基和羧基殘基能夠與重金屬離子發(fā)生螯合反應(yīng)。減小P(AA-AM)水凝膠粒徑、增大溶液pH值、升高吸附環(huán)境溫度均有利于吸附反應(yīng)的進(jìn)行。粒徑為0.097~0.15 mm的P(AA-AM)水凝膠粉末,在35℃、p H=5的條件下進(jìn)行吸附等溫線實(shí)驗(yàn),得到水凝膠對(duì)重金屬Cu~(2+),Pb~(2+),Zn~(2+)和Cd~(2+)的理論最大吸附量分別為186,588,208和403 mg/g。P(AA-AM)水凝膠對(duì)重金屬離子的吸附符合準(zhǔn)二級(jí)動(dòng)力學(xué)模型(R~20.98),吸附等溫線符合Langmuir吸附等溫線(R~20.95)。干擾離子實(shí)驗(yàn)和理論模擬均證明P(AAAM)水凝膠對(duì)Pb~(2+)具有良好的吸附性。
[Abstract]:In this paper, the initiator of AA-A, AM) was used as the initiator, and the initiator was NNT-methylene bisacrylamide as the crosslinking agent, and K2S2O8 was used as the initiator. The aqueous solution polymerization method was used to synthesize PnAA-AMN hydrogels. The preparation process of PnAA-AM-based hydrogel was optimized by orthogonal experiment, and the SEM and XPS analysis of the prepared hydrogel was carried out. The adsorption isotherms and adsorption kinetics of Cu~(2 and Cd~(2) hydrogels were studied. The effects of particle size, adsorption temperature, pH value and initial concentration of heavy metal ions on the adsorption properties of PnAA-AMN hydrogels were studied. The prepared AA-AMN hydrogel is a kind of polymer material with three-dimensional network structure. The amino and carboxyl residues on the surface can chelate with heavy metal ions, decrease the particle size of PnAA-AMN hydrogel, and increase the pH value of the solution. The adsorption reaction was facilitated by increasing the temperature of adsorption environment, and the hydrogel powder with a particle size of 0.097 ~ 0.15 mm was obtained at 35 鈩，

本文編號(hào)：1482525