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Dewaxed Honeycomb as an Economic and Sustainable Scavenger for Malachite Green from Water.
ACS Omega ( IF 3.7 ) Pub Date : 2020-07-28 , DOI: 10.1021/acsomega.0c02011 Roshni Kumari 1 , Md Adnan Khan 1 , Mithilesh Mahto 1 , Md Atif Qaiyum 1 , Jhilirani Mohanta 1 , Banashree Dey 2 , Soumen Dey 1
ACS Omega ( IF 3.7 ) Pub Date : 2020-07-28 , DOI: 10.1021/acsomega.0c02011 Roshni Kumari 1 , Md Adnan Khan 1 , Mithilesh Mahto 1 , Md Atif Qaiyum 1 , Jhilirani Mohanta 1 , Banashree Dey 2 , Soumen Dey 1
Affiliation
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Dewaxed honeycomb powder (HCP) was used as a promising adsorbent for removal of malachite green (MG) from aqueous solution. Raw honeycomb was strategically dewaxed by petroleum ether, and the purified product was characterized by Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), pHzpc, and proximate analysis. A high uptake capacity (123 mg/g) was found at neutral pH. Experimental data follow pseudo-second-order kinetics (k2 as 0.45 × 10–2 g/min/mg, R2 = 0.986) and Langmuir isotherm with R2 0.999. Thermodynamic parameters suggested a spontaneous (ΔG = −26.28 kJ/mol) and exothermic (ΔH = −11.61 kJ/mol) process, which suggests increased randomness (ΔS = 0.0486 kJ/mol) at the solid–liquid interface during the adsorption process. The material can be regenerated by ordinary salt solution (1 M NaCl) and efficiently reused for three cycles with a minimal loss in efficiency. Adsorption mechanism is proposed to be a combination of electrostatic interaction and π–π stacking between aromatic units of HCP and MG. Abundant availability, possibility of wax commercialization, economic sustainability, and comprehensive waste management make HCP an ideal choice for dye decolorization.
中文翻译：
脱蜡蜂窝作为水中孔雀石绿的经济和可持续的清除剂。
脱蜡蜂窝状粉末（HCP）用作从水溶液中去除孔雀石绿（MG）的有前途的吸附剂。用石油醚对蜂窝状生坯进行战略性脱蜡，纯化的产物用傅立叶变换红外（FTIR）光谱，扫描电子显微镜（SEM），pH zpc和邻近分析进行表征。在中性pH下发现高吸收能力（123 mg / g）。实验数据遵循伪二级动力学（k 2为0.45×10 –2 g / min / mg，R 2 = 0.986），朗缪尔等温线的R 2为0.999。热力学参数表明是自发的（ΔG = -26.28 kJ / mol）和放热的（ΔH= -11.61 kJ / mol）过程，这表明在吸附过程中固液界面处的随机性增加（ΔS = 0.0486 kJ / mol）。可以通过普通盐溶液（1 M NaCl）再生该材料，并在效率损失最小的情况下有效地重复使用三个循环。提出的吸附机理是HCP和MG芳族单元之间静电相互作用和π–π堆积的组合。丰富的可用性，蜡商业化的可能性，经济的可持续性以及全面的废物管理使HCP成为染料脱色的理想选择。
更新日期：2020-08-11
中文翻译：
脱蜡蜂窝作为水中孔雀石绿的经济和可持续的清除剂。
脱蜡蜂窝状粉末（HCP）用作从水溶液中去除孔雀石绿（MG）的有前途的吸附剂。用石油醚对蜂窝状生坯进行战略性脱蜡，纯化的产物用傅立叶变换红外（FTIR）光谱，扫描电子显微镜（SEM），pH zpc和邻近分析进行表征。在中性pH下发现高吸收能力（123 mg / g）。实验数据遵循伪二级动力学（k 2为0.45×10 –2 g / min / mg，R 2 = 0.986），朗缪尔等温线的R 2为0.999。热力学参数表明是自发的（ΔG = -26.28 kJ / mol）和放热的（ΔH= -11.61 kJ / mol）过程，这表明在吸附过程中固液界面处的随机性增加（ΔS = 0.0486 kJ / mol）。可以通过普通盐溶液（1 M NaCl）再生该材料，并在效率损失最小的情况下有效地重复使用三个循环。提出的吸附机理是HCP和MG芳族单元之间静电相互作用和π–π堆积的组合。丰富的可用性，蜡商业化的可能性，经济的可持续性以及全面的废物管理使HCP成为染料脱色的理想选择。
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