title: Sorption of sulphamethoxazole by the biochars derived from rice straw and alligator flag.
abstract: The sorption ability of sulphamethoxazole (SMX) by biochar derived from rice straw (RS) and alligator flag (AF) at 600°C was studied to assess the ability of biochar as adsorbent to remove SMX from aqueous solution. The results indicated that sorption of SMX by biochars was well described using the Langmuir equation (R2>0.94), and the maximum sorption parameter (Q) of RS (3650 mg kg(-1)) was much higher than that of AF (1963 mg kg(-1)). Temperature had no effect on SMX sorption by biochars, while thermodynamics analysis indicated that the sorption of SMX on both biochars was a spontaneous physical process. The d 250 RS (diameter of RS sieved through 250 µm) and d 150 AF (diameter of AF sieved through 150 µm) showed excellent sorption ability for SMX. The sorption amount of RS was larger than that of AF when pH<7, whereas, the sorption amount of AF surpassed RS when pH≥7. The presence of Cu2+ and/or Cd2+ ion at low concentrations (20 mg L(-1)) significantly (P<0.05) increased the sorption of SMX on both RS and AF. Our study confirms that biochar derived from the wetland plants could be used as effective adsorbents to remove SMX from aqueous solution.
authors.affiliation: a Ministry of Education Key Laboratory of Environmental Remediation and Ecological Health, College of Environmental and Resource Sciences , Zhejiang University , Hangzhou 310058 , Peoples' Republic of China.
authors.forename: Tingqiang
authors.initials: T
authors.lastname: Li
authors.forename: Xuan
authors.initials: X
authors.lastname: Han
authors.forename: Chengfeng
authors.initials: C
authors.lastname: Liang
authors.forename: M J I
authors.initials: MJ
authors.lastname: Shohag
authors.forename: Xiaoe
authors.initials: X
authors.lastname: Yang
mesh_terms: D000327:Adsorption; D000890:Anti-Infective Agents / Q000737:chemistry / Q000302:isolation & purification; D001673:Biodegradation, Environmental; D002606:Charcoal / Q000737:chemistry*; D052918:Environmental Restoration and Remediation / Q000379:methods; D032426:Marantaceae / Q000737:chemistry*; D012275:Oryza / Q000737:chemistry*; D035261:Plant Components, Aerial / Q000737:chemistry; D013420:Sulfamethoxazole / Q000737:chemistry / Q000302:isolation & purification*; D014462:Ultrafiltration / Q000379:methods*; D014873:Water Pollutants / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D000890:Anti-Infective Agents; D014873:Water Pollutants; C540010:biochar; D002606:Charcoal; D013420:Sulfamethoxazole
keywords: alligator flag; biochar; rice straw; sorption; sulphamethoxazole