Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Effective Adsorptive Removal of Methylene Blue from Water by Didodecyldimethylammonium Bromide-Modified Brown Clay.
ACS Omega ( IF 3.7 ) Pub Date : 2020-06-29 , DOI: 10.1021/acsomega.0c01613 Muhammad Munir 1 , Muhammad Faizan Nazar 1 , Muhammad Nadeem Zafar 1 , Muhammad Zubair 1 , Muhammad Ashfaq 1 , Ahmad Hosseini-Bandegharaei 2, 3 , Salah Ud-Din Khan 4 , Ashfaq Ahmad 5
ACS Omega ( IF 3.7 ) Pub Date : 2020-06-29 , DOI: 10.1021/acsomega.0c01613 Muhammad Munir 1 , Muhammad Faizan Nazar 1 , Muhammad Nadeem Zafar 1 , Muhammad Zubair 1 , Muhammad Ashfaq 1 , Ahmad Hosseini-Bandegharaei 2, 3 , Salah Ud-Din Khan 4 , Ashfaq Ahmad 5
Affiliation
|
In the present investigation, brown clay (BC) was modified with didodecyldimethylammonium bromide (DDAB) to produce a sorbent (DDAB-BC), which was characterized and applied for sorption of methylene blue (MB) from aqueous media. BC was functionalized using DDAB by cation exchange of the DDAB moiety with positive ions existing inside the interlayer spaces of the BC. X-ray diffraction (XRD) studies confirmed that the d-spacing of DDAB-BC became wider (3.39 Å) than that of BC (3.33 Å). Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were exploited to explore the functional groups and morphological structure of sorbents, respectively. The Brunauer–Emmett–Teller (BET) surface area, pore volume, and pore diameter of DDAB-BC were determined as 124.6841 m2/g, 0.316780 cm3/g, and 8.75102 nm, respectively. Batch sorption investigations were carried out to determine the optimum experimental conditions, using the one-factor one-time procedure. The sorption of MB on DDAB-BC strongly obeyed the Langmuir isotherm and agreed well with pseudo-second-order kinetics. Sorption of MB onto DDAB-BC showed maximum efficiency (∼98%) and maximum sorption capacity (∼164 mg/g) at optimal values of pertinent factors: dye concentration (100 mg/L), pH (7), and temperature (55 °C). Sorption isothermal studies predicted that removal of MB on DDAB-BC follows multilayer sorption at higher MB dye concentrations and monolayer sorption at lower MB dye concentrations.
中文翻译：
十二烷基二甲基溴化铵改性的褐土对水中亚甲基蓝的有效吸附去除。
在本研究中，用十二烷基二甲基溴化铵（DDAB）改性棕色粘土（BC）以生产吸附剂（DDAB-BC），并对其进行了表征并用于从水性介质中吸附亚甲基蓝（MB）。使用DDAB，通过DDAB部分与存在于BC层间空间中的阳离子进行阳离子交换，使BC功能化。X射线衍射（XRD）研究证实，DDAB-BC的d间距比BC的（3.33Å）宽（3.39Å）。利用傅里叶变换红外光谱（FTIR）和扫描电子显微镜（SEM）分别研究了吸附剂的官能团和形态结构。布鲁纳-埃默特-泰勒（BET）的表面积，孔体积和DDAB-BC的孔径确定为124.6841 m 2/g、0.316780 cm 3 / g和8.75102 nm。使用一因素单次程序进行了分批吸附研究，以确定最佳的实验条件。DDAB-BC上的MB吸附强烈遵守Langmuir等温线，并与拟二级动力学一致。在相关因素的最佳值：染料浓度（100 mg / L），pH（7）和温度下，MB在DDAB-BC上的吸附显示出最大效率（〜98％）和最大吸附容量（〜164 mg / g）。 55°C）。吸附等温研究预测，DDAB-BC上的MB去除是在较高MB染料浓度下进行多层吸附，而在较低MB染料浓度下进行单层吸附。
更新日期：2020-07-14
中文翻译：
十二烷基二甲基溴化铵改性的褐土对水中亚甲基蓝的有效吸附去除。
在本研究中，用十二烷基二甲基溴化铵（DDAB）改性棕色粘土（BC）以生产吸附剂（DDAB-BC），并对其进行了表征并用于从水性介质中吸附亚甲基蓝（MB）。使用DDAB，通过DDAB部分与存在于BC层间空间中的阳离子进行阳离子交换，使BC功能化。X射线衍射（XRD）研究证实，DDAB-BC的d间距比BC的（3.33Å）宽（3.39Å）。利用傅里叶变换红外光谱（FTIR）和扫描电子显微镜（SEM）分别研究了吸附剂的官能团和形态结构。布鲁纳-埃默特-泰勒（BET）的表面积，孔体积和DDAB-BC的孔径确定为124.6841 m 2/g、0.316780 cm 3 / g和8.75102 nm。使用一因素单次程序进行了分批吸附研究，以确定最佳的实验条件。DDAB-BC上的MB吸附强烈遵守Langmuir等温线，并与拟二级动力学一致。在相关因素的最佳值：染料浓度（100 mg / L），pH（7）和温度下，MB在DDAB-BC上的吸附显示出最大效率（〜98％）和最大吸附容量（〜164 mg / g）。 55°C）。吸附等温研究预测，DDAB-BC上的MB去除是在较高MB染料浓度下进行多层吸附，而在较低MB染料浓度下进行单层吸附。
京公网安备 11010802027423号