Adsorption of sulfamerazine from water by biochar derived from astragalus membranaceus residue
HE Wen-ze1, HE Le-lin1, LI Wen-hong1, LIAO Qian-jia-hua1, SHANG Jing-ge1,2
1. School of Engineering, China Pharmaceutical University, Nanjing 210009, China;
2. State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences Nanjing 210008, China
Herb biochar was derived from Astragalus membranaceus residue at five different temperatures: 200℃, 400℃, 500℃, 600℃, and 700℃. The biochars were characterized by SEM, FTIR, and BET techniques. The effects of contact time, initial concentration, dosage, and pH of solution on the adsorption behaviors of the biochars were evaluated, and were preliminarily used to assess the adsorption mechanism of sulfamerazine by biochar. The results showed that surface area, pore volume, and sorption capacity of the biochars increased as the pyrolysis temperature increased. The SBET values for the natural residue and BC700 were 0.42m2/g and 155.69m2/g, respectively. The SBET and adsorption capacity were increased about 370-fold and 181-fold. The adsorption kinetics were found to be best represented by the pseudo-second-order kinetic model (R2>0.994). The isotherm sorption behavior is best described by the Langmuir model (R2=0.9977), and the maximum adsorption capacity was observed to be 11.96mg/g. Sulfamerazine adsorption by biochar first increased and then decreased with increasing dosage and pH; the optimum solution pH was 4.
何文泽, 何乐林, 李文红, 廖千家骅, 商景阁. 中药渣生物炭对磺胺甲基嘧啶的吸附及机理研究[J]. 中国环境科学, 2016, 36(11): 3376-3382.
HE Wen-ze, HE Le-lin, LI Wen-hong, LIAO Qian-jia-hua, SHANG Jing-ge. Adsorption of sulfamerazine from water by biochar derived from astragalus membranaceus residue. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(11): 3376-3382.
Zhang Q Q, Ying G G, Pan C G, et al. Comprehensive evaluation of antibiotics emission and fate in the river basins of China:source analysis, multimedia modeling, and linkage to bacterial resistance[J]. Environmental Science and Technology, 2015, 49(11):6772-6782.
[2]
Yiruhan, Wang Q J, Mo C H, et al. Determination of four fluoroquinolone antibiotics in tap water in Guangzhou and Macao[J]. Environmental Pollution, 2010,158(7):2350-2358.
[3]
Jiang L, Hu X, Yin D, et al. Occurrence, distribution and seasonal variation of antibiotics in the Huangpu River, Shanghai, China[J]. Chemosphere, 2011,82(6):822-828.
[4]
Yang J F, Ying G G, Zhao J L, et al. Spatial and seasonal distribution of selected antibiotics in surface waters of the Pearl Rivers, China[J]. Journal of Environmental Science and Health, Part B, 2011,46(3):272-280.
[5]
Jia A, Hu J, Wu X, et al. Occurrence and source apportionment of sulfonamides and their metabolites in Liaodong Bay and the adjacent Liao River Basin, North China[J]. Environmental Toxicology and Chemistry, 2011,30(6):1252-1260.
[6]
Wang H, Wang B, Zhao Q, et al. Antibiotic body burden of Chinese school children:a multisite biomonitoring-based study[J]. Environ. Sci. Technol., 2015,49(8):5070-5079.
Prasse C, Schlu? sener M P, Schulz R, et al. Antiviral drugs in wastewater and surface waters:a new pharmaceutical class of environmental relevance?[J]. Environmental Science and Technology, 2010,44(5):1728-1735.
Gaunt J L, Lehmann J. Energy balance and emissions associated with biochar sequestration and pyrolysis bioenergy production[J]. Environmental Science and Technology, 2008,42(11):4152-4158.
[12]
Lehmann J, Gaunt J, Rondon M. Bio-char sequestration in terrestrial ecosystems-a review[J]. Mitigation and adaptation strategies for global change, 2006,11(2):395-419.
Chun Y, Sheng G, Chiou C T, et al. Compositions and sorptive properties of crop residue-derived chars[J]. Environmental Science and Technology, 2004,38(17):4649-4655.
[24]
Chen B, Zhou D, Zhu L. Transitional adsorption and partition of nonpolar and polar aromatic contaminants by biochars of pine needles with different pyrolytic temperatures[J]. Environmental Science and Technology, 2008,42(14):5137-5143.
Yapar S, Özbudak V, Dias A, et al. Effect of adsorbent concentration to the adsorption of phenol on hexadecyl trimethyl ammonium-bentonite[J]. Journal of Hazardous Materials, 2005, 121(1):135-139.