The presence of pharmaceutical compounds in drinking water continues to be problematic in recent times. Adsorption of these compounds is an effective way to mitigate these problems to protect aquatic wildlife. Biochar is a renewable resource that can be used as an adsorption media in this role. This study explored the use of white pine (Pinus strobus) and Norway spruce (Picea abies) needles as feedstocks for producing biochars, which can be utilized as both an adsorbent and solid fuel. The effect of carbonization temperature (500, 700, & 900 ℃) on the solid fuel and caffeine adsorption characteristics of biochars derived from these feedstocks were investigated. The calorific values increased from 29.09–30.30 MJ/kg and 26.62–27.44 MJ/kg for white pine and Norway spruce needle derived biochars, respectively as the carbonization temperature increased. The ignition temperature increased from 390 to 480 ℃ for white pine needle derived biochars and from 368 to 400 °C for Norway spruce needle derived biochars as the carbonization temperature increased. The burnout temperatures for white pine needle derived biochars were between 670–775 ℃ while Norway spruce needle derived biochars presented burnout temperatures of 679–685 ℃. The specific surface areas of the biochars were between 1.72 and 167.71 m²/g. The monolayer caffeine adsorption capacities (q_m) of the NS900 and WP900 biochars were 9.27 and 11.85 mg/g, respectively.

近来，饮用水中药物化合物的存在一直是有问题的。吸附这些化合物是减轻这些问题以保护水生野生生物的有效方法。生物炭是一种可再生资源，可以在此角色中用作吸附介质。这项研究探索了白松（Pinus strobus）和挪威云杉（Picea abies）的使用。）针头用作生产生物炭的原料，可同时用作吸附剂和固体燃料。研究了碳化温度（500、700和900℃）对这些原料衍生的生物炭的固体燃料和咖啡因吸附特性的影响。随着碳化温度的升高，白松和挪威云杉针状生物炭的发热量分别从29.09–30.30 MJ / kg和26.62–27.44 MJ / kg升高。随着碳化温度的升高，白松针衍生生物炭的着火温度从390℃升高，挪威云杉针衍生生物炭的着火温度从368升高到400°C。白松针衍生生物炭的燃尽温度为670–775℃，而挪威云杉针衍生生物炭的燃尽温度为679–685℃。² /克。NS900和WP900生物炭的单层咖啡因吸附容量（q _m）分别为9.27和11.85 mg / g。