Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, Zhejiang A & F University, Lin'an, Zhejiang 311300, PR China; Zhejiang Provincial Collaborative Innovation Center for Bamboo Resources and High-efficiency Utilization, Zhejiang A & F University, Lin'an, Zhejiang 311300, PR China.
Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass, Zhejiang A & F University, Lin'an, Zhejiang 311300, PR China.
Bioresour Technol. 2018 Nov;268:454-459. doi: 10.1016/j.biortech.2018.08.023. Epub 2018 Aug 7.
The protonated amine modified hydrochar (PAMH) was synthesized by etherification, amination and protonated reaction with hydrochar, which was enriched with abundant protonated amine for methyl orange (MO) removal. PAMH was characterized by elemental analysis, scanning electron microscopy, nitrogen adsorption-desorption measurement, zeta potential and Fourier transform infrared. The sorption of MO from aqueous solution by PAMH was investigated by batch experiments. The results showed that sorption of MO was significantly influenced by the initial concentration of MO, temperature, contact time and ionic strength, while hardly affected by pH values ranging from 4 to 11. The pseudo-second-order and Langmuir equations were able to depict sorption kinetics and sorption isotherms, respectively. Thermodynamic analysis indicated that the sorption behavior was thermopositive and spontaneous. The maximum theoretical uptake computed by the Langmuir equation was 909.09 mg·g at 303 K, which suggested that PAMH was an effective sorbent to eliminate anionic dye from aqueous solution.
质子化胺改性水凝胶（PAMH）是通过水凝胶的醚化、胺化和质子化反应合成的，富含丰富的质子化胺，可用于去除甲基橙（MO）。采用元素分析、扫描电子显微镜、氮吸附-脱附测量、动电位和傅里叶变换红外光谱对 PAMH 进行了表征。通过批量实验研究了 PAMH 从水溶液中对 MO 的吸附。结果表明，MO 的初始浓度、温度、接触时间和离子强度对 MO 的吸附有显著影响，而 pH 值在 4 到 11 之间几乎没有影响。准二级和 Langmuir 方程分别能够描述吸附动力学和吸附等温线。热力学分析表明，吸附行为是热正自发的。Langmuir 方程计算的最大理论吸附量在 303 K 时为 909.09 mg·g，表明 PAMH 是一种从水溶液中去除阴离子染料的有效吸附剂。
