摘要
【目的】研究油茶粕低温焙烧制备生物炭对印染废水污染物甲基橙的吸附性。【方法】以油茶粕为原料制备生物炭,用于甲基橙的吸附。分析生物炭投放量、pH值、反应温度、反应时间和初始溶液浓度对油茶粕生物炭吸附性能的影响,并运用准一级动力学模型、准二级动力学模型、Langmuir及Freundlich等温吸附模型分析吸附过程。【结果】当吸附剂投加量为10 mg时,吸附量达到最大(85.06 mg/g);在pH值为2的强酸性条件下,因静电吸附作用最强,去除率达到最高(89.68%);当反应温度为35℃时,去除率最高(89.64%),吸附效果最佳;当反应时间为35 min时,已接近吸附平衡,去除率达94.48%,兼顾了吸附率与效果;当初始溶液浓度为30 mg/g时,吸附率最高(70.38%),超过此浓度后因竞争吸附导致吸附率下降。动力学分析表明吸附过程更符合准一级动力学模型(R^(2)=0.989),等温吸附分析则显示Langmuir模型(R^(2)=0.928)能更好地描述该吸附行为,表明其为单分子层吸附。【结论】油茶粕低温焙烧制备生物炭为印染废水处理提供了一种可持续的解决方案,也让油茶粕资源实现了无害化、减量化和高值化利用。
【Objective】To study the adsorption property of biochar prepared by low-temperature calcination of Camellia oleifera meal on methyl orange,a pollutant in printing and dyeing wastewater.【Method】Biochar was prepared from C.oleifera meal and used for the adsorption of methyl orange.The effects of biochar dosage,pH value,reaction temperature,reaction time and initial solution concentration on the adsorption performance of C.oleifera meal biochar were analyzed,and the adsorption process was analyzed by using quasi⁃first⁃order kinetic model,quasi⁃second⁃order kinetic model,Langmuir and Freundlich isothermal adsorption model.【Result】When the dosage of adsorbent was 10 mg,the adsorption capacity reached the maximum(85.06 mg/g);under the strong acid condition of pH=2,because of the strongest electrostatic adsorption,the removal rate reached the maximum(89.68%);When the reaction temperature was 35℃,the removal rate was the highest(89.64%),and the adsorption effect was the best;when the reaction time was 35 min,the adsorption equilibrium was approached,and the removal rate was 94.48%,which gave consideration to both adsorption efficiency and effect;When the initial solution concentration was 30 mg/g,the adsorption rate was the highest(70.38%),and when the concentration was higher than 30 mg/g,the adsorption rate decreased due to competitive adsorption.Kinetic analysis showed that the adsorption process was more in line with the pseudo⁃first⁃order kinetic model(R^(2)=0.989),while isothermal adsorption analysis showed that the Langmuir model(R^(2)=0.928)could better describe the adsorption behavior,indicating that it was a monomolecular layer adsorption.【Conclusion】The lowtemperature calcination of C.oleifera meal to prepare biochar provided a sustainable solution for the treatment of printing and dyeing wastewater,achieving harmless,reduced and high-value utilization of C.oleifera meal resources.
作者
刘涛
刘霞
卢鹏飞
刘明灯
李畅
刘郁林
李晨清
钟显斌
LIU Tao;LIU Xia;LU Pengfei;LIU Mingdeng;LI Chang;LIU Yulin;LI Chenqing;ZHONG Xianbin(Jiangxi Environmental Engineering Vocational College,Ganzhou Jiangxi 341000,China;College of Forestry,Jiangxi Agricultural University,Nanchang Jiangxi 330045,China;Xingguo County Tobacco Monopoly Bureau,Ganzhou Jiangxi 342499,China;Convenient Service Center of Shefu Township,Xingguo County,Ganzhou Jiangxi 342411,China)
出处
《南方林业科学》
2025年第5期31-37,共7页
South China Forestry Science
基金
江西省林业局油茶研究专项(JXYCZX〔2023〕030201)
江西省林业局创新专项(创新项目〔2025〕26号)
高层次人才引进科研启动基金(RCQD〔2023〕3)。
关键词
油茶粕
生物炭
吸附
甲基橙
Camellia oleifera meal
biochar
adsorption
methyl orange
