Comprehensive Adsorption Studies of Doxycycline and Ciprofloxacin Antibiotics by Biochars Prepared at Different Temperatures

Abstract

This paper comparatively investigated the removal efficiency and mechanisms of rice straw biochars prepared under three pyrolytic temperatures for two kinds of tetracycline and quinolone antibiotics (doxycycline and ciprofloxacin). The influencing factors of antibiotic adsorption (including biochar dosage, pH, background electrolytes, humic acid, initial antibiotics concentration, contact time, and temperature) were comprehensively studied. The results suggest that biochars produced at high-temperature [i.e., 700°C (BC700)], have higher adsorption capacity for the two antibiotics than low-temperature (i.e., 300–500°C) biochars (BC300 and BC500). Higher surface area gives rise to greater volume of micropores and mesopores, and higher graphitic surfaces of the BC700 contributed to its higher functionality. The maximum adsorption capacity was found to be in the following order: DOX > CIP. The π-π EDA interaction and hydrogen bonding might be the predominant adsorption mechanisms. Findings in this study highlight the important roles of high-temperature biochars in controlling the contamination of tetracycline and quinolone antibiotics in the environment.

The synergetic effect of a structure-engineered mesoporous SiO2–ZnO composite for doxycycline adsorption

“…It can be seen that the adsorption equilibrium was attained only within 90 min, a much shorter time period than those of other reported adsorbents. 64,65 Moreover, it should be noted that the equilibrium time needed for commercial ZnO nanoparticles (with diameters < 100 nm) was more than 24 h under the same conditions. The fast adsorption rate of mesoporous SiO 2 -ZnO may be due mainly to the short mesopore channels and highly open structure, both of which increase the mass transfer and frequency of contact between adsorbents and DOX, exposing large amounts of surface area for adsorption.…”

Kinetics study of Removal Doxycycline drug from aqueous solution using Aluminum Oxide surface

“…The reason for the lower rates of adsorption at high initial concentration can be explained by the high rivalry for the adsorption surface sites. From this, we can conclude that the adsorption was chemical adsorption many studies kinds of research proved the validity of the pseudo-second-order model for the kinetic of DOH adsorption [16][17][18][19][20][21][22][23][24][25][26][27][28][29].…”

“…In recent years, attention has grown to know the fate of the environment because low levels of antibiotics can help spread antibioticresistant bacteria. Doxycycline belongs to a group of medicines called tetracycline antibiotics, DOH drugs have the same extensive spectrum antibiotics for activity against nearly all gram-positive and gram-negative bacteria but it is preferably on other tetracycline's in the remediation of certain infections because of its trustworthy absorption and the lengths of the half-time, it is used to treat chronic prostatic, syphilis and pelvic inflammatory malady, It also adversely affects the environment when it is present in industrial wastewater [5]. (Model: BS-11degetal, JEIO Korea, TECH) were also used in this study.…”

Facile synthesis of MnOx‐loaded biochar for the removal of doxycycline hydrochloride: effects of ambient conditions and co‐existing heavy metals

“…Therefore, its variable physicochemical properties and complicated structures lead to their complex behaviour in the water environment . Many methods have been reported for removing antibiotics from water such as biodegradation, hydrolysis, photodegradation and adsorption . As a fast, efficient, economical and environmentally friendly method in wastewater treatment, adsorption has attracted special interest in removing DOX from aquatic environments .…”