Removal of organic pollutants from red water by magnetic-activated coke

Abstract

2014):Removal of organic pollutants from red water by magnetic-activated coke, Desalination and Water Treatment, A magnetic adsorbent, magnetic-activated coke (MAC), is incorporated with Fe 3 O 4 particles for removal of organic materials from 2,4,6-trinitrotoluene red water. The MAC is characterized by N 2 adsorption, Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscope, and energy dispersive X-ray spectroscopy. Adsorption of organic pollutants is evaluated systematically by varying the adsorbent dosage, exposure time, temperature, pH, and dilution ratios of 2,4,6-trinitrotoluene red water. The equilibrium adsorption data can be better fitted with the Freundlich isotherm than Langmuir isotherm except at 343 K. The adsorption kinetics follows a pseudo-second-order model and thermodynamic analysis indicates an endothermic and spontaneous adsorption process. The settling rate after adsorption suggests that the response of MAC under an external magnetic field is very fast.

Fe3O4@C Matrix with Tailorable Adsorption Capacities for Paracetamol and Acetylsalicylic Acid: Synthesis, Characterization, and Kinetic Modeling

“…Adsorption is a well-known and efficient technique used for the elimination of pollutants, in which the adsorbent may vary from carbon nanotubes [8] and polymeric materials [25] to various oxides [26], natural clay [27], or composite materials [28]. The adsorption process usually involves multistep filtration, long waiting time, and filtration materials [24,29]. Activated carbon is known as a very good adsorbent due to its unique porous texture and high adsorption capacity [14,27], while magnetic materials [29,30] have the advantage of fast magnetic separation; the only material used for separation in this case is an external magnet.…”

“…The adsorption process usually involves multistep filtration, long waiting time, and filtration materials [24,29]. Activated carbon is known as a very good adsorbent due to its unique porous texture and high adsorption capacity [14,27], while magnetic materials [29,30] have the advantage of fast magnetic separation; the only material used for separation in this case is an external magnet. Fast magnetic separation has significant economic impact, while providing high separation efficiency.…”

Adsorption of T.N.T. from Wastewater Using Ni-Oxide and Cu-Oxide Nanoparticles

“…So, several methods have been used for decontamination of T.N.T. from wastewater and contaminated soil such as biotreatment 17 , alkaline hydrolysis, chemical reduction, catalytic degradation, photocatalytic degradation, flocculation, and adsorption [18][19][20][21][22][23][24][25][26][27] . High surface area and low-cost adsorbents are often favored to eliminate harmful materials 28 .…”

Research on Regenerating Activated Carbon in 2,4,6‐Trinitrotoluene (TNT) Explosives Manufacturing Industry by Microwave Radiation and Ionized Nitrogen

“…Due to the ecological toxicity and durability of TNT and its modified products in the environment, there are many treatment methods studied by scientists around the world such as liquid phase oxidation under high temperature and pressure [10], the enhanced oxidation method uses H 2 O 2 , O 3 , Fenton, TiO 2 combined with UV [11][12][13][14], the adsorption method with different materials [15][16][17], biological method using microorganisms capable of decomposing TNT [18,19].…”