CAJ | 학술논문

在N,N-二甲基甲酰胺中，以次磷酸钠作为催化剂，采用柠檬酸对泡桐皮、芦苇、花生叶3种生物质材料进行化学改性，制备得到生物吸附剂，并研究Cr(Ⅵ)溶液pH值、初始溶液Cr(Ⅵ)浓度、吸附时间等因素对水溶液中 Cr(Ⅵ)吸附率的影响。采用红外光谱分析仪对吸附材料的分子结构及其化学键进行表征。结果表明：3种改性生物质材料在pH值为2、Cr(Ⅵ)初始浓度为30 mg/L时，吸附性能较好，吸附平衡时间为120 min。可以用准二级动力学方程很好地描述生物质材料吸附过程。改性后的泡桐皮、芦苇、花生叶对 Cr(Ⅵ)的最大吸附率分别为96.78%、91.85%和89.63%，其中改性后泡桐皮具有最大的吸附量。
재N,N-이갑기갑선알중，이차린산납작위최화제，채용저몽산대포동피、호위、화생협3충생물질재료진행화학개성，제비득도생물흡부제，병연구Cr(Ⅵ)용액pH치、초시용액Cr(Ⅵ)농도、흡부시간등인소대수용액중 Cr(Ⅵ)흡부솔적영향。채용홍외광보분석의대흡부재료적분자결구급기화학건진행표정。결과표명：3충개성생물질재료재pH치위2、Cr(Ⅵ)초시농도위30 mg/L시，흡부성능교호，흡부평형시간위120 min。가이용준이급동역학방정흔호지묘술생물질재료흡부과정。개성후적포동피、호위、화생협대 Cr(Ⅵ)적최대흡부솔분별위96.78%、91.85%화89.63%，기중개성후포동피구유최대적흡부량。
Paulownia peel, reed and peanut leaf were chemically modified with citric acid by using sodium hypophosphite monohydrate (NaH 2PO2·H2O) as a catalyst in N,N-dimethylformamide (DMF) to obtain biosorbents. The effects of pH of Cr(Ⅵ) solution, initial concentration of Cr(Ⅵ), adsorption time on the adsorption efficiency of Cr(Ⅵ) in aqueous solution were investigated. Fourier transform infrared spectroscopy were used to characterize the molecular structure and its chemical bond of the adsorbent. The results show that, when pH value is 2 and the initial concentration of Cr(Ⅵ) is 30mg/L, three biomass materials have superior adsorptive properties. The adsorption processes achieves equilibrium within 120 min and are found to be well described by the pseudo-second order adsorption kinetics. The maximum adsorption efficiencies of Cr(Ⅵ) by modified paulownia peel, reed and peanut leaf are 96.78%, 91.85% and 89.63%, respectively. Among these biosorbents, the modified paulownia peel has the highest adsorption quantity.