Amino-functionalized MIL-88B(Fe)-based porous carbon for enhanced adsorption toward ciprofloxacin pharmaceutical from aquatic solutions

Abstract

The present study focused on the synthesis of novel NH 2 -PC700 adsorbent through the pyrolysis of NH 2 -MIL-88B (Fe) material under different pyrolysis temperatures (500, 700, and 900 C) and investigated its application for ciprofloxacin adsorption. The obtained adsorbents were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and nitrogen adsorption/desorption isotherm measurements. The parameters of the adsorption experiments that affect the removal efficiency, including solution pH (3e10), contact time (0e240 min), and initial concentration (10e40 mg/L), were also studied in detail. For the adsorption kinetic and isotherm studies, nonlinear models combined with error functions such as adjusted coefficient of determination (R 2 adj ), mean relative error (MRE), and squares of the errors (SSE) were used to evaluate the compatibility between kinetic models (pseudo-first-order, pseudo-second-order, Elovich, and Bangham) and isotherm (Langmuir, Freundlich, Temkin, and DubinineRadushkevitch) adsorption equations. Besides, the role of amino functionalization for the ciprofloxacin (CFX) adsorption of NH 2 -PC700 adsorbent was also explained. Through the Langmuir model, the maximum CFX adsorption capacity of NH 2 -PC700 was calculated to be 102.5 mg/g, considerably higher than that of NH 2 -MIL-88B (Fe). This outcome suggested that NH 2 -PC700 could be a promising adsorbent for the CFX remediation.

Efficient adsorbent based on construction and demolition wastes functionalized with 3-aminopropyltriethoxysilane (APTES) for the removal ciprofloxacin from hospital synthetic effluents

“…The amino-functionalized adsorbent gave a higher adsorption capacity of 138.0 mg g −1 . The high CFX efficient adsorption could be due to the grafting amino (-NH 2 ) groups [18].…”

“…ICDW-APTES presented high efficiency in the CFX adsorption that is caused by the grafted amino groups (presented in APTES). Amino groups possess electron-rich nitrogen, which exhibits a relatively strong Lewis base [18]. Meanwhile, CFX molecules are fluorinated and constituted by amino, tertiary amine, and carboxylic (−COOH) groups [17,18].…”

“…Amino groups possess electron-rich nitrogen, which exhibits a relatively strong Lewis base [18]. Meanwhile, CFX molecules are fluorinated and constituted by amino, tertiary amine, and carboxylic (−COOH) groups [17,18]. These structures favor some interactions such as H-bond with amino, tertiary amine, and carboxylic groups of CFX and also hydrophobic and π-π interactions between carbon structures of the adsorbateadsorbent, and in turn leading to enhanced adsorption capacity.…”

Removal of aqueous Cr(VI) by magnetic biochar derived from bagasse

“…Current treatment methods of chromium-containing wastewater include adsorption, precipitation, electrolysis, ion exchange, and membrane separation, each of which is accompanied by various advantages and disadvantages 5 – 8 . With the development of adsorption technology, researchers have become increasingly focused on developing new, low-cost adsorbents for use in adsorption technology 9 , 10 .…”

Process Optimization Studies of Congo Red Dye Adsorption onto Magnesium Aluminium Layered Double Hydroxide Using Response Surface Methodology

“…Over the past decades, efficient adsorbent materials, which often include alginate, activated carbon, denatured chitin, zeolite, and bentonite have been studied to remove dyes from the aqueous media [1][2][3][4][5][6][7][8]. However, the hydrotalcite materials have been receiving a lot of attentions from researchers mainly because of its wide application potential in many areas such as adsorption, catalysis, photochemistry, biomedical, sensor [9][10][11].…”