School of Plant, Environmental, and Soil Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA, 70803, USA.
Division of Applied Life Science (BK21 Program) and Institute of Agriculture and Life Science, Gyeongsang National University, Jinju, 52828, South Korea.
Environ Geochem Health. 2019 Aug;41(4):1675-1685. doi: 10.1007/s10653-017-0067-7. Epub 2018 Jan 18.
Recycling food waste for beneficial use is becoming increasingly important in resource-limited economy. In this study, waste chicken bones of different parts from restaurant industry were pyrolyzed at 600 °C and evaluated for char physicochemical properties and Pb sorption characteristics. Lead adsorption isotherms by different chicken bone chars were carried out with initial Pb concentration range of 1-1000 mg L at pH 5. The Pb adsorption data were better described by the Langmuir model (R = 0.9289-0.9937; ARE = 22.7-29.3%) than the Freundlich model (R = 0.8684-0.9544; ARE = 35.4-72.0%). Among the chars derived from different chicken bone parts, the tibia bone char exhibited the highest maximum Pb adsorption capacity of 263 mg g followed by the pelvis (222 mg g), ribs (208 mg g), clavicle (179 mg g), vertebrae (159 mg g), and humerus (135 mg g). The Pb adsorption capacities were significantly and positively correlated with the surface area, phosphate release amount, and total phosphorus content of chicken bone chars (r ≥ 0.9711). On the other hand, approximately 75-88% of the adsorbed Pb on the chicken bone chars was desorbable with 0.1 M HCl, indicating their recyclability for reuse. Results demonstrated that chicken bone char could be used as an effective adsorbent for Pb removal in wastewater.
在资源有限的经济中，回收食物垃圾以实现有益利用变得越来越重要。本研究以餐饮业不同部位的废鸡骨为原料，在 600°C 下进行热解，并对所得鸡骨炭的物理化学性质和 Pb 吸附特性进行了评价。采用不同鸡骨炭进行 Pb 吸附等温线实验，初始 Pb 浓度范围为 1-1000mg/L，pH 值为 5。Pb 吸附数据更符合 Langmuir 模型（R=0.9289-0.9937；ARE=22.7-29.3%），而非 Freundlich 模型（R=0.8684-0.9544；ARE=35.4-72.0%）。在所制备的不同鸡骨部位的炭中，胫骨炭的最大 Pb 吸附容量最高，为 263mg/g，其次是骨盆（222mg/g）、肋骨（208mg/g）、锁骨（179mg/g）、脊椎（159mg/g）和肱骨（135mg/g）。Pb 吸附容量与鸡骨炭的比表面积、磷酸盐释放量和总磷含量呈显著正相关（r≥0.9711）。另一方面，用 0.1M HCl 可解吸鸡骨炭上吸附的约 75-88%的 Pb，表明其具有可回收性，可重复使用。结果表明，鸡骨炭可用作废水中 Pb 去除的有效吸附剂。
