Remediation of pharmaceutical contaminated water by use of magnetic functionalized metal organic framework. Physicochemical study of doxycycline adsorption

Abstract

The presence of pharmaceutical pollutant, doxycycline (DOC) in water and waste streams has negative impact on the environment. In this research, metal organic framework was synthesized and functionalized by potassium nickel ferrocyanide (KNiFC). After characterisation, the functionalized adsorbent was used for removal of DOC from aqueous solutions. The adsorbent containing 80% of KNiFC exhibited the high adsorption capacity of 100 mg/g. The adsorption process was kinetically fast and the equilibration was established within 30 min. The used adsorbent retained 90% of its initial capacity after regeneration. The magnetic susceptibility of the adsorbent measured by VSM technique was 35 emu/g and sufficient for separation of the used adsorbent by external magnetic field. Isotherm models including Langmuir, Freundlich, Tempkin, Redlich‐Peterson, and Sips were applied to correlate the experimental equilibrium data. To evaluate the fitness of the isotherm equations error analysis methods, residual root mean square error and average relative error were used.

The Effectiveness of MOFs for the Removal of Pharmaceuticals from Aquatic Environments: A Review Focused on Antibiotics Removal

“…NH 2 and SO 3 H functionalization of UiO‐66 (Zr) has also been confirmed by C−N stretching, N−H wagging (1258 cm −1 and 764 cm −1 ) peaks, and O=S=O symmetric and asymmetric stretching frequencies at 1237 and 1180 cm −1 , on the FT‐IR spectra [44] . FT‐IR spectrum of functionalized HUKST‐1 by the introduction of cyanide group should have a peak at 2091 cm −1 , which is related to the C≡N band in cyanide structure [30b] . Alternatively, the successful synthesis of magnetic MOF has been shown by the peaks revealed in the FT‐IR spectrum, indicating the presence of covalent bonds of the magnetic nanoparticle.…”

“…When using magnetic MOFs, the separation of MOFs from solution is considerably facilitated by using external magnetic fields. To evaluate the magnetic capability, a magnetization property of a sample can be measured by the vibrating sample magnetometer technique (VSM) [20b,30b] . Bayazit et al.…”

“…They also studied removing DOC from real streams such as river water, effluent from a pharmaceutical plant, and tap water. By increasing the potassium nickel ferrocyanide percentage up to 80% in MOF structure, DOC adsorption increased, then decreased [30b] . Wei et al.…”

Applications of aluminum oxide and nano aluminum oxide as adsorbents: review

“…Antibiotics are deeming as an environmental and health challenges due to their genotoxic and mutagenic influences and continuance in natural ecosystem [30].…”

Elimination of cephalexin and doxycycline under low frequency ultrasound

“…On the other hand, Doxycycline (DOX) is a tetracycline with potent antibacterial activity [7] . It is used to treat infections caused by bacteria, including pneumonia and other respiratory tract infections; some infections of the skin and eyes; and also infections of the lymphatic, digestive, reproductive and urinary systems [8] . CPX and DOX might be released into surface waters and ground waters due to incomplete metabolism (in animals) and discharges from drug manufacturers, a situation that could lead to the development of antibiotic-resistant microorganisms, and eventual adverse impacts on human health through potential endocrine disruption and toxic by-products generation [6] , [9] , [10] , [11] .…”