本文選題：硅膠 + 席夫堿�。� 參考：《武漢紡織大學(xué)》2017年碩士論文

【摘要】：本文以硅膠為基質(zhì),通過對其進(jìn)行氨基修飾并與5-溴水楊醛及其衍生物反應(yīng)得到負(fù)載席夫堿配體的改性硅膠吸附劑SG-H2L1、SG-H2L2和SG-H2L3,并用其吸附模擬廢水中的金屬離子和陰離子。通過FT-IR、SEM、BET、EPR、TGA等進(jìn)行了表征分析,研究了三種吸附劑對金屬鹽溶液中陽離子和陰離子的吸附行為。金屬陽離子和陰離子的吸附量分別由電感耦合等離子發(fā)生光譜儀(ICP)和離子色譜儀(ICS)測定。通過pH值、溫度、不同的陽離子和陰離子競爭吸附等因素來探究吸附劑對金屬離子和陰離子的吸附性能。對于改性硅膠的抑菌研究,本文制備了三種硅膠負(fù)載季銨鹽的抗菌劑SG-QA8、SG-QA12和SG-QA16。采用FT-IR、EA、TGA、XPS等對改性硅膠抗菌劑進(jìn)行了分析表征。SG-QA8、SG-QA112和SG-QA16對大腸桿菌和金黃色葡萄球菌的抗菌實(shí)驗(yàn)采用平板計數(shù)法進(jìn)行研究。上述研究得出以下結(jié)論:(1)SG-H2L3對金屬離子和陰離子的吸附量大于SG-H2L1、SG-H2L2,說明SG-H2L3對金屬離子和陰離子的吸附具有協(xié)同作用;當(dāng)Cu2+、Ni2+、Mn2+、Co2+和Cd2+這五種金屬陽離子同時存在時,吸附劑SG-H2LI、SG-H2L2、SG-H2L3及其前驅(qū)體SG-NH-NH2均只對Cu2+有吸附;當(dāng)SO42-、Cl-和NO3-三種陰離子同時存在下,吸附劑SG-H2L1、SG-H2L2、SG-H2L3 及其前驅(qū)體 SG-NH-NH2 均只對 SO42-和 NO3-有吸附能力,并且吸附能力為SO42-NO3-;SG-H2L3對Cu2+和SO42-的吸附的吸附行為符合Langmuir等溫方程和準(zhǔn)二級動力學(xué)模型,最大吸附量分別為54.14mg/g和75.13mg/g;熱力學(xué)結(jié)果表明,SG-H2L3對Cu2+和SO42-的吸附過程是一個自發(fā)的吸熱過程。(2)經(jīng)過氨基修飾的硅膠SG-(NH)2-NH2對大腸桿菌和葡萄球菌均無抗菌性;SG-QA8、SG-QA12、SG-QA16三種抗菌劑對葡萄球菌的抗菌性均強(qiáng)于大腸桿菌;三種抗菌劑對大腸桿菌和葡萄球菌抗菌性強(qiáng)弱順序?yàn)镾G-QA16SG-QA12SG-QA8;當(dāng)加入0.4mL(1×108CFU/mL)大腸桿菌時,SG-QA8、SG-QA12、SG-QA16的最低抑菌濃度分別為 20mg/mL、16mg/mL、12mg/mL;當(dāng)加入 0.5mL(8.5×108CFU/mL)金黃色葡萄球菌時,SG-QA8、SG-QA12、SG-QA16的最低抑菌濃度分別為 2.4mg/mL、1 mg/mL、0.8 mg/mL。
[Abstract]:In this paper, modified silica gel adsorbents SG-H2L1, SG-H2L2L2 and SG-H2L3 were prepared by amino modification of silica gel and reaction with 5-bromosalicylaldehyde and its derivatives. The adsorbents SG-H2L1- SG-H2L2 and SG-H2L3 were used to adsorb metal ions and anions in simulated wastewater. The adsorption of cations and anions in metal salt solution by three adsorbents was studied. The adsorption amounts of metal cations and anions were measured by inductively coupled plasma generation spectrometer (ICP) and ion chromatograph (ICS), respectively. The adsorption properties of metal ions and anions were investigated by pH value, temperature, competition adsorption of cations and anions. In this paper, three antimicrobial agents, SG-QA8, SG-QA12 and SG-QA16, which are loaded with quaternary ammonium salts, were prepared for the bacteriostasis of modified silica gel. Modified silica gel antimicrobial agents were analyzed and characterized by FT-IR TGAGA-XPS. The antibacterial activities of SG-QA8 SG-QA112 and SG-QA16 against Escherichia coli and Staphylococcus aureus were studied by plate counting method. The results show that the adsorption capacity of SG-H2L3 to metal ions and anions is higher than that of SG-H2L1SG-H2L2, which indicates that SG-H2L3 has synergistic effect on the adsorption of metal ions and anions. The adsorbent SG-H2L2L2SG-H2L3 and its precursor SG-NH-NH2 only adsorbed Cu2, and the adsorbents SG-H2L1, SG-H2L2L2SG-H2L3 and their precursor SG-NH-NH2 only adsorbed so _ 42- and no _ 3- in the presence of so _ 42-Cl _ (-) and no _ (3-) at the same time, the adsorbent SG-H2L1 / SG-H2L2SG-H2L3 and its precursor SG-NH-NH2 only adsorbed so _ 42- and no _ 3- in the presence of so _ 42-O _ 3- and no _ 3-. The adsorption capacity of so _ 42-NO _ 3-O _ G-H _ 2L _ 3 for Cu2 and so _ 42- was in accordance with the Langmuir isothermal equation and the quasi-second-order kinetic model. The maximum adsorption capacity was 54.14mg/g and 75.13 mg / g, respectively; the thermodynamic results showed that the adsorption of Cu2 and so _ 42- by SG-H _ 2L _ 3 was a spontaneous endothermic process.) the amino modified silica gel SG-(NH)2-NH2 had no antimicrobial activity against Escherichia coli and Staphylococcus, and SG-QA8, SG-QA12SG-QA16 had no antimicrobial effect on Escherichia coli and Staphylococcus. The antibacterial activity of Staphylococcus was stronger than that of Escherichia coli. The antimicrobial activity of three antimicrobial agents against Escherichia coli and Staphylococcus was in the order of SG-QA16SG-QA12SG-QA8; when 0.4mL(1 脳 108CFU / mL was added, the minimum inhibitory concentration of SG-QA8SG-QA12SG-QA16 was 20mg / mL16mg / mL-1, respectively; when 0.5mL(8.5 脳 108CFU / mL was added, the minimum inhibitory concentration of SG-QA8SG-QA12SG-QA16 was 2.4 mgmL1 mg / mL0.
【學(xué)位授予單位】：武漢紡織大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：O647.3

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