Abstract
Pharmaceutical contaminants are increasingly found in the aqua environment. The effective removal of pharmaceuticals from wastewater streams is a major worldwide challenge. Adsorption technology is considered to be a cost-effective and promising method to treat pharmaceutical pollutants from water bodies in low concentration levels. Biochar is a low-cost, sustainable adsorbent material with various economic and environmental benefits. The chapter discusses and evaluates the adsorption performance of biochar for the removal of various pharmaceuticals by considering the biochar production methods and physical and chemical characteristics of biochar. The pharmaceutical adsorption onto biochar can be improved by selecting the appropriate production method, production conditions, and biochar feedstock material. The maximum adsorption capacity of various biochar for pharmaceuticals was found to be sulfonamide 88.10 mg/g, Ibuprofen (569.6 mg/g), oxytetracycline hydrochloride (730 mg/g), diclofenac (877 mg/g), and sulfamethoxazole (24.06 mg/g). The adsorption mechanism is mainly associated with physicochemical interactions, including electrostatic and hydrophobic interactions, hydrogen bonding, π–π interaction, and pore filling.
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Abbreviations
- BC-PM:
-
Pig manure biochar
- BC-PW:
-
Pine wood biochar
- EC:
-
Electrical conductivity
- EDX:
-
Energy Dispersive X-Ray Analysis
- IBP:
-
Ibuprofen
- M-BCs:
-
Mapel leaves biochar
- MSW:
-
Municipal solid waste
- NSAIDs:
-
Non-steroidal anti-inflammatory drugs
- OTC:
-
Oxytetracycline
- SCAB:
-
Chemically activated biochar
- SD:
-
Sodium declofenic
- SMX:
-
Sulfamethoxazole
- SPAB:
-
Comprising steam-activated biochar
- SPY:
-
Sulfapyridine
- TC:
-
Tetracycline
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Glossary
- Adsorbent
-
The substance that adsorbs another.
- Adsorption isotherm
-
The relationship between the equilibrium adsorbate concentrations in the liquid phase and the equilibrium adsorption amount in the solid phase at a certain temperature.
- Adsorption kinetics
-
The measure of the adsorption uptake with respect to time at constant pressure or concentration and is employed to measure the diffusion of adsorbate in the pores.
- Aliphatic compounds
-
Chemical compounds belonging to the organic class in which the atoms are connected by single, double, or triple bonds to form nonaromatic structures.
- Aromatic compounds
-
Hydrocarbons containing sigma bonds and delocalized pi electrons between carbon atoms in a ring.
- Carbonization
-
The conversion of organic matters such as plants and dead animal remains into carbon through destructive distillation.
- Eco-friendly
-
Not harmful to the environment.
- Electrical conductivity
-
The degree to which a specified material conducts electricity, calculated as the ratio of the current density in the material to the electric field that causes the flow of current.
- Functional group
-
A group of atoms responsible for the characteristic reactions of a particular compound.
- Hydrologic cycle
-
A cycle that involves the continuous circulation of water in the Earth-atmosphere system.
- Pharmaceuticals
-
Compounds manufactured for use as a medicinal drug.
- Pore volume
-
The total volume of very small openings in a bed of adsorbent particles.
- Pyrolysis
-
Thermal decomposition of materials at elevated temperatures in an inert atmosphere. It involves a change in the chemical composition.
- Specific surface area
-
Property of solids defined as the total surface area of a material per unit of mass.
- Thermochemical
-
Interrelation of heat with a chemical reaction or physical change of state.
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Zubair, M. et al. (2024). Biochar for Adsorptive Removal of Pharmaceuticals from Environmental Water. In: Wang, L.K., Sung Wang, MH., Hung, YT. (eds) Waste Treatment in the Biotechnology, Agricultural and Food Industries. Handbook of Environmental Engineering, vol 27. Springer, Cham. https://doi.org/10.1007/978-3-031-44768-6_6
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