Sukmana Hadid, Ballai Gergő, Gyulavári Tamás, Illés Erzsébet, Kozma Gábor, Kónya Zoltán, Hodúr Cecilia
Doctoral School of Environmental Science, University of Szeged, Moszkvai krt. 9, Szeged 6725, Hungary.
Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla tér. 1, Szeged 6720, Hungary.
Heliyon. 2023 Jun 9;9(6):e17154. doi: 10.1016/j.heliyon.2023.e17154. eCollection 2023 Jun.
The wastewater of the dye industry can be characterized by a complex chemical composition and consists of numerous dyes. Bioadsorbents are increasingly applied for the biosorption of dyes because they are inexpensive and environmentally friendly. Rice husk (RH) is a potential agricultural waste that can be converted into a bioadsorbents for the biosorption of cationic dyes. Herein, the removal of methylene blue (MB) and basic red 9 (BR9) dyes by Hungarian rice husk (HRH) and Indonesian rice husk (IRH) using binary biosorption was investigated. Adsorbents were characterized by zeta potential, Fourier-transform infrared spectroscopy, and scanning electron microscopy. Batch biosorption evaluated the influence of different variables, including pH, adsorbent dose, contact time, and initial concentrations. Several factors that influence the biosorption of MB and BR9 onto rice husk were assessed using main effect, Pareto charts, normal probability plots, and interaction effect in a factorial design. The optimum contact time was 60 min. Isotherm and kinetic models of MB and BR9 in binary biosorption fitted to the Brunauer-Emmett-Teller multilayer and the Elovich equation based on correlation coefficients and nonlinear chi-square. Results showed that the biosorption capacity of HRH was 10.4 mg/g for MB and 10 mg/g for BR9; values for IRH were 9.3 mg/g and 9.6 mg/g, respectively. Therefore, HRH and IRH were found to be effective adsorbents for removing MB and BR9 via binary biosorption.
染料工业废水的化学成分复杂，含有多种染料。生物吸附剂因其价格低廉且环保，越来越多地应用于染料的生物吸附。稻壳（RH）是一种潜在的农业废弃物，可转化为用于阳离子染料生物吸附的生物吸附剂。在此，研究了匈牙利稻壳（HRH）和印度尼西亚稻壳（IRH）通过二元生物吸附去除亚甲基蓝（MB）和碱性红9（BR9）染料的情况。通过zeta电位、傅里叶变换红外光谱和扫描电子显微镜对吸附剂进行了表征。分批生物吸附评估了不同变量的影响，包括pH值、吸附剂剂量、接触时间和初始浓度。在析因设计中，使用主效应、帕累托图、正态概率图和交互效应评估了影响MB和BR9在稻壳上生物吸附的几个因素。最佳接触时间为60分钟。基于相关系数和非线性卡方，二元生物吸附中MB和BR9的等温线和动力学模型符合Brunauer-Emmett-Teller多层模型和Elovich方程。结果表明，HRH对MB的生物吸附容量为10.4 mg/g，对BR9为10 mg/g；IRH的值分别为9.3 mg/g和9.6 mg/g。因此，发现HRH和IRH是通过二元生物吸附去除MB和BR9的有效吸附剂。
