期刊
ENVIRONMENTAL RESEARCH
卷 201, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.envres.2021.111218
关键词
Ciprofloxacin; Acetaminophen; Sorption; Environmental factors; Banana; Peel biochars; Emerging contaminants
资金
- PSA, GOI for financial assistance under the project Delhi Cluster-Delhi Research Implementation and Innovation (DRIIV)
- Department of Science and Technology, New Delhi, India [DST/TM/WTI/2K15/121]
- University Grant Commission (UGC), New Delhi
- Mississippi State University, USA in the project Clean Energy and Water Initiatives [F.194-1/2014(IC)]
- CSIR, New Delhi, India for the Research Fellowship (CSIR-SRF)
Environmental and process parameters were evaluated for the sorption of ciprofloxacin and acetaminophen onto banana peel biochars. The biochars prepared at 750 degrees Celsius showed maximum pharmaceutical sorption. Relationships between biochar properties and sorptive potential were positively correlated with surface area, total pore volume, %C, %ash and C/N molar ratios.
Environmental (pH, temperature ionic strength, cations, anions) and process (pyrolysis temperature, particle size, adsorbent dosage, initial concentration) parameters were evaluated for ciprofloxacin and acetaminophen sorption onto a series of sustainable banana peel biochars. Ciprofloxacin and acetaminophen were chosen as model pharmaceuticals for removal owing to their worldwide presence in aquatic systems. After pyrolytic preparation from 450 to 750 degrees C, the biochars were qualitatively and quantitatively characterized by physicochemical, morphological, mineralogical and elemental analyses. Batch sorption studies were employed to evaluate the pH effects from 2 to 10, biochar pyrolysis temperatures (450, 550, 650, and 750 degrees C), particle sizes (30-50, 50-100, 100-150 BSS mesh), adsorbent dosages (0.5, 1.0, 2.0 g/L), adsorbate concentrations (0.5-200 ppm) and uptake temperatures (10, 25, 40 degrees C) on sorption efficiency. Maximum pharmaceutical sorption is achieved by the biochar prepared at 750 degrees C. Sorption rate increased with decrease in biochar particle size from 30 to 50 to 100-150 BSS mesh. Relationships between biochar properties and their sorptive potential showed positive correlations with surface area, total pore volume, %C, %ash and C/N molar ratios. Sorption data was modelled using different isotherm models and both kinetic and thermodynamic equations. Maximum Langmuir capacities of ciprofloxacin and acetaminophen on BPBC750 were 23.3 and 40.8 mg/g at 10 degrees C; 21.0 and 49.93 mg/g at 25 degrees C and 20.42 and 57.3 mg/g at 45 degrees C, respectively. Langmuir isotherm fittings and thermodynamic parameters confirmed the exothermic sorption (for ciprofloxacin) and endothermic sorption (for acetaminophen). The role of ionic strength, cations and anions on pharmaceuticals sorption were evaluated. H-bonding, pi-pi-interactions and pore diffusion were major contributors to pharmaceutical sorption.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据