Effect of Alkaline and Oxidative Treatment on Sawdust Capacity to Remove Cd(Ⅱ) from Aqueous Solutions: FTIR and AFM Study

BOLDIZSAR NAGY; CARMEN MANZATU; ANDRADA MAICANEANU; CERASELLA INDOLEAN; LUMINITA SILAGHI-DUMITRESCU; CORNELIA MAJDIK

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Effect of Alkaline and Oxidative Treatment on Sawdust Capacity to Remove Cd(Ⅱ) from Aqueous Solutions: FTIR and AFM Study

机译：碱性和氧化处理对木屑去除水溶液中Cd（Ⅱ）能力的影响：FTIR和AFM研究

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Two treatments, sodium hydroxide and hydrogen peroxide, were applied to enhance the capacity of fir tree (Abies alba) sawdust to adsorb Cd(Ⅱ). Fourier transform infrared spectroscopy (FTIR) analysis and atomic force microscopy (AFM) were used to characterize untreated and treated fir tree sawdust. The removal of Cd(Ⅱ) ions by treated sawdust was dependent on the initial Cd(Ⅱ) concentration, initial pH, and temperature. Kinetics (pseudo-first-, pseudo-second-order, intra-particle, and film diffusion models) and isotherm models (Langmuir and Freundlich) of the considered biosorption process were examined. The pseudo-second-order model was found to better model the kinetics of Cd(Ⅱ) adsorption. Maximum adsorption capacities calculated using the Langmuir model are 8.84 and 2.67 mg/g for NaOH and H_2O_2 treated sawdust, respectively, and 2.20 mg/g for untreated sawdust. The results indicate that the two treatments enhanced the adsorption capacity of the studied sawdust.

机译：分别采用氢氧化钠和过氧化氢两种处理方法来提高枞树（Abies alba）木屑吸附Cd（Ⅱ）的能力。傅里叶变换红外光谱（FTIR）分析和原子力显微镜（AFM）用于表征未处理和处理过的杉树木屑。处理过的木屑对Cd（Ⅱ）离子的去除取决于初始Cd（Ⅱ）浓度，初始pH和温度。考察了所考虑的生物吸附过程的动力学（伪一阶，伪二阶，粒子内和膜扩散模型）和等温线模型（Langmuir和Freundlich）。发现伪二级模型可以更好地模拟Cd（Ⅱ）的吸附动力学。使用Langmuir模型计算得出的最大吸附容量分别为NaOH和H_2O_2处理的木屑，分别为8.84和2.67 mg / g，未经处理的锯末为2.20 mg / g。结果表明，两种处理均提高了所研究的木屑的吸附能力。

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来源
《Journal of Wood Chemistry and Technology》 |2014年第4期|301-311|共11页
作者
BOLDIZSAR NAGY; CARMEN MANZATU; ANDRADA MAICANEANU; CERASELLA INDOLEAN; LUMINITA SILAGHI-DUMITRESCU; CORNELIA MAJDIK;
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作者单位

Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Cluj-Napoca, Romania;

Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Cluj-Napoca, Romania;

Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Cluj-Napoca, Romania;

Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Cluj-Napoca, Romania;

Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, Cluj-Napoca, Romania;

Faculty of Chemistry and Chemical Engineering, Babes-Bolyai University, 11 Arany Janos st., RO-400028, Cluj-Napoca, Romania;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
原文格式 PDF
正文语种 eng
中图分类
关键词
Biosorption; cadmium; Abies alba; chemical treatment; FTIR and AFM study;

机译：生物吸附镉;白冷杉化学处理;FTIR和AFM研究;

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Effect of Alkaline and Oxidative Treatment on Sawdust Capacity to Remove Cd(Ⅱ) from Aqueous Solutions: FTIR and AFM Study

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