当前位置：
X-MOL 学术
›
Chemosphere
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Microalgae derived honeycomb structured mesoporous diatom biosilica for adsorption of malachite green: Process optimization and modeling
Chemosphere ( IF 8.1 ) Pub Date : 2024-03-16 , DOI: 10.1016/j.chemosphere.2024.141696 Shikha Dubey 1 , Rakesh K Mishra 2 , Savaş Kaya 3 , Eldon R Rene 4 , Balendu Shekher Giri 5 , Yogesh C Sharma 6
Chemosphere ( IF 8.1 ) Pub Date : 2024-03-16 , DOI: 10.1016/j.chemosphere.2024.141696 Shikha Dubey 1 , Rakesh K Mishra 2 , Savaş Kaya 3 , Eldon R Rene 4 , Balendu Shekher Giri 5 , Yogesh C Sharma 6
Affiliation
|
The present study investigated the removal of malachite green dye from aquifers by means of microalgae-derived mesoporous diatom biosilica. The various process variables (dye concentration, pH, and adsorbent dose) influencing the removal of the dye were optimized and their interactive effects on the removal efficiency were explored by response surface methodology. The pH of the solution (pH = 5.26) was found to be the most dominating among other tested variables. The Langmuir isotherm ( = 0.995) best fitted the equilibrium adsorption data with an adsorption capacity of 40.7 mg/g at 323 K and pseudo-second-order model ( = 0.983) best elucidated the rate of dye removal (10.6 mg/g). The underlying mechanism of adsorption was investigated by Weber-Morris and Boyd models and results revealed that the film diffusion governed the overall adsorption process. The theoretical investigations on the dye structure using DFT-based chemical reactivity descriptors indicated that malachite green cations are electrophilic, reactive and possess the ability to accept electrons, and are strongly adsorbed on the surface of diatom biosilica. Also, the Fukui function analysis proposed the favorable adsorption sites available on the adsorbent surface.
中文翻译：
用于吸附孔雀石绿的微藻衍生蜂窝结构介孔硅藻生物二氧化硅：工艺优化和建模
本研究研究了通过微藻衍生的介孔硅藻生物二氧化硅从含水层中去除孔雀石绿染料。对影响染料去除的各种工艺变量（染料浓度、pH 值和吸附剂剂量）进行了优化，并通过响应面法探讨了它们对去除效率的交互影响。发现溶液的 pH 值（pH = 5.26）是其他测试变量中最主要的。 Langmuir 等温线 (= 0.995) 最适合平衡吸附数据，在 323 K 时吸附容量为 40.7 mg/g，伪二阶模型 (= 0.983) 最能阐明染料去除率 (10.6 mg/g)。通过韦伯-莫里斯和博伊德模型研究了吸附的基本机制，结果表明薄膜扩散控制了整个吸附过程。使用基于DFT的化学反应性描述符对染料结构的理论研究表明，孔雀石绿阳离子具有亲电性、反应性并具有接受电子的能力，并且强烈吸附在硅藻生物二氧化硅的表面上。此外，福井函数分析提出了吸附剂表面上可用的有利吸附位点。
更新日期：2024-03-16
中文翻译：
用于吸附孔雀石绿的微藻衍生蜂窝结构介孔硅藻生物二氧化硅：工艺优化和建模
本研究研究了通过微藻衍生的介孔硅藻生物二氧化硅从含水层中去除孔雀石绿染料。对影响染料去除的各种工艺变量（染料浓度、pH 值和吸附剂剂量）进行了优化，并通过响应面法探讨了它们对去除效率的交互影响。发现溶液的 pH 值（pH = 5.26）是其他测试变量中最主要的。 Langmuir 等温线 (= 0.995) 最适合平衡吸附数据，在 323 K 时吸附容量为 40.7 mg/g，伪二阶模型 (= 0.983) 最能阐明染料去除率 (10.6 mg/g)。通过韦伯-莫里斯和博伊德模型研究了吸附的基本机制，结果表明薄膜扩散控制了整个吸附过程。使用基于DFT的化学反应性描述符对染料结构的理论研究表明，孔雀石绿阳离子具有亲电性、反应性并具有接受电子的能力，并且强烈吸附在硅藻生物二氧化硅的表面上。此外，福井函数分析提出了吸附剂表面上可用的有利吸附位点。
京公网安备 11010802027423号