Chemistry Department, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia.
Chemistry Department, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia.
J Hazard Mater. 2019 May 5;369:528-538. doi: 10.1016/j.jhazmat.2019.02.058. Epub 2019 Feb 16.
A novel hyper cross-linked, 3,5-diacrylamidobenzoic acid based resin (APEADA) has been synthesized for the highly efficient removal of Congo red (CR) and Rhodamine B (RhB) from aqueous solution. The synthesized resin was extensively characterized by FT-IR, FESEM, PXRD, EDX, BET analysis, TGA and solid state C (CP-MAS) NMR. APEADA exhibits thermal stability (≈ 200 °C) and a considerable surface area (64.78 m g), as suggested by Thermogravimetric Analysis (TGA) and Brunauer-Emmett-Teller (BET) analysis, respectively. The experimental data of dyes adsorption onto resin was examined by a variety of isotherm models wherein Langmuir and Temkin models were found to be the best fit for explaining the adsorption of both RhB (R = 0.9899) and CR (R = 0.9919). The resin can efficiently remove CR (92.03%) at pH 8.14 and moderately adsorb RhB (45.3%) at pH 5.01 and exhibits maximum adsorption capacity (Q) for CR (280.0 mg g) and RhB (23.28 mg g) at 318.6 K. The thermodynamic analysis of the data revealed that the adsorption processes were exothermic and spontaneous. Moreover, APEADA showed efficient removal efficiency (80.13%) for dyes in simulated effluents which warrants its utility and effectiveness in industrial waste water treatment.
一种新型超交联的 3,5-二丙烯酰胺基苯甲酸基树脂（APEADA）已被合成，用于从水溶液中高效去除刚果红（CR）和罗丹明 B（RhB）。合成的树脂通过 FT-IR、FESEM、PXRD、EDX、BET 分析、TGA 和固态 C（CP-MAS）NMR 进行了广泛的表征。APEADA 表现出热稳定性（≈200°C）和相当大的表面积（64.78 m²/g），分别由热重分析（TGA）和 Brunauer-Emmett-Teller（BET）分析得出。通过多种等温线模型检验了染料在树脂上的吸附实验数据，其中 Langmuir 和 Temkin 模型被发现最适合解释 RhB（R = 0.9899）和 CR（R = 0.9919）的吸附。该树脂可在 pH 8.14 下有效去除 CR（92.03%），在 pH 5.01 下适度吸附 RhB（45.3%），并在 318.6 K 时对 CR（280.0 mg/g）和 RhB（23.28 mg/g）表现出最大吸附容量（Q）。数据的热力学分析表明，吸附过程是放热和自发的。此外，APEADA 对模拟废水中的染料具有高效的去除效率（80.13%），这证明了其在工业废水处理中的实用性和有效性。
