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The adsorptive properties of the pesticides 2,4-D, mecoprop, and dicamba on a pinus-based biochar were scrutinized from conventional and statistical physics approaches. Firstly, the pinus-based biochar was prepared from Pinus elliottii and extensively characterized. Then, the conventional adsorption studies were made using kinetic equilibrium and thermodynamics. Subsequently, the statistical physics model of Hill was used to interpret the data. Finally, the pinus-biochar was used to uptake the pesticides from a real river water sample. The results revealed that the pinus-biochar is a rich-carbon material (carbon content higher than 99%) with high thermal stability, interesting textural features, and proper characteristics to effectively uptake small and polar organic molecules. At a pH of 7.0 and using 1.0 g/L, the biochar reduced the concentration of pesticide solutions from 50 μg/L to less than 4.0 μg/L in 2 h of …