包装与食品机械2026，Vol.44Issue(4)：57-67,11.DOI:10.3969/j.issn.1005-1295.2026.04.006
板栗苞生物炭的制备及其改性后对食用油中苯并[a]芘的吸附性能研究
Preparation of chestnut bur biochar and its adsorption performance for benzo[a]pyrene in edible oils after modification
摘要
Abstract
To realize the high-value utilization of agricultural waste chestnut burs,an adsorbent material was prepared for the efficient removal of benzo[a]pyrene(BaP)from edible oils.Biochars were prepared from chestnut burs using different preparation processes,and the biochar with the optimal adsorption performance was selected for KOH activation.The effect of different mass ratios of biochar to KOH was investigated.The biochars before and after activation were characterized by BET,SEM,XRD,XPS,and FTIR.The adsorption mechanism of BaP was analyzed using kinetic and isotherm models,and the removal conditions were optimized in actual oil samples.The results showed that after KOH activation,the specific surface area of the biochar increased from 606.18 m2/g to 739.82 m2/g,with an increase in surface oxygen-containing functional groups and well-developed pore structures.The adsorption of BaP by the activated biochar followed the pseudo-second-order kinetic and Langmuir isotherm models.The maximum adsorption capacity calculated by the Langmuir model reached 467.80 mg/g,which was 36.44%higher than that of the unactivated biochar.Under the optimal conditions of temperature 110℃,adsorbent dosage 0.4%(mass fraction),and adsorption time 25 min,the removal rate of BaP from soybean oil reached 96.7%.This study provides a theoretical basis and technical reference for the resource utilization of agricultural waste and the safe purification of edible oils.关键词
板栗苞/生物炭/KOH活化/苯并[a]芘脱除Key words
chestnut bur/biochar/KOH activation/benzo[a]pyrene removal分类
轻工纺织引用本文复制引用
胡芷璇,赵涛,徐志祥..板栗苞生物炭的制备及其改性后对食用油中苯并[a]芘的吸附性能研究[J].包装与食品机械,2026,44(4):57-67,11.基金项目
国家自然科学基金面上项目(32572678) （32572678）
山东省重点研发计划项目(2023TZXD075) （2023TZXD075）
