Removal of tetracycline from aqueous solution by biochar derived from rice straw

Abstract

Antibiotic pollution has drawn considerable attention and the removal of antibiotic from water is crucial. In the present study, biochars were produced from rice straw under different pyrolytic temperatures of 300 °C, 500 °C, and 700 °C (RSBC300, RSBC500, and RSBC700, respectively). The biochars were used to remove tetracycline (TC) from aqueous solution and the influence of different experimental conditions on TC removal was investigated. The results showed that the order of adsorption was as follows: RSBC700 > RSBC500 > RSBC300. A pseudo-second-order model and Langmuir isotherm model described the adsorption process of TC on biochars. Maximum adsorption capacity could reach 50.72 mg g at 35 °C based on Langmuir fitting. Initial pH of the solution had little influence on TC removal. The inhibitory effect of Ca on TC removal was greater than that of Na. High system temperature was beneficial for TC removal. Minerals in RSBC500 affected TC removal and minerals in RSBC300 and RSBC700 had little influence on TC removal. TC removal rate decreased from 58.86 to 27.84% when the minerals were removed from RSBC500. The main mechanism involved in high-temperature biochar and TC adsorption included EDA π-π interactions and electrostatic interactions. Therefore, high-temperature biochar derived from rice straw has the potential to act as an adsorbent to remove tetracycline from aqueous solution.

Review of organic and inorganic pollutants removal by biochar and biochar-based composites

“…BC is rich in aromatic structure, and it was an excellent adsorbent for removing hydrophobic organics contaminants (Vithanage et al 2015). Recently, Fan et al (2018) pyrolyzed rice straw at different temperatures for the removal of typical antibiotics tetracycline (TC) by BC. The BC obtained at a higher temperature could possess the maximum adsorption capacity of 50.72 mg/g due to its large specific surface area, abundant aromatic structure and rich graphite carbon.…”

Ultrasound-Assisted Removal of Tetracycline by a Fe/N–C Hybrids/H2O2 Fenton-like System

“…Until now, different techniques have been proposed to remove various pollutants. 5−15 For TC removal, biological treatments, 7,8 electrochemical treatments, 9 adsorption, 10−14 membrane processes, 13,14 and advanced oxidation technologies 8,9,12,15 have been developed. Among these methods, the advanced oxidation processes are supposed to be a promising wastewater treatment technology.…”

“…This leads to its environmental mobility and its long persistence in environment. , Therefore, it is significant to treat this kind of antibiotic in wastewater. Until now, different techniques have been proposed to remove various pollutants. − For TC removal, biological treatments, , electrochemical treatments, adsorption, − membrane processes, , and advanced oxidation technologies ,,, have been developed. Among these methods, the advanced oxidation processes are supposed to be a promising wastewater treatment technology. ,,,− In particular, as an important advanced oxidation technology, Fenton or Fenton-like oxidation processes have been widely used in treatment of antibiotics wastewater. , Among various Fenton catalysts, iron-containing catalysts including Fe 3 O 4 nanoparticles (NPs), Fe 2 O 3 , Fe 0 , FeOOH, and platform­(e.g., polymer, activated carbon, zeolite, clay, carbon nanotubes, etc.…”

Recent advances on sustainable removal of emerging contaminants from water by bio-based adsorbents

“…Fan et al and Chen et al used rice straw manure biochar for the adsorption of tetracycline from aqueous solution. 79,80 The use of Dendro wood biochar is reported for the removal of oxytetracycline. 81,82 Municipal solid waste biochar was used for the adsorption of tetracycline (TC) and acetaminophen (APAP).…”