不同水热温度对梁山慈竹水热炭的理化性质影响研究  

Study on the Effects of Different Preparation Temperatures on the Physicochemical Properties of the Hydrothermal Charcoal of Dendrocalamus farinosus

作　　者：杨凡钦 李汉邯 胡尚连[1,2] YANG Fan-qin;LI Han-han;HU Shang-lian(Southwest University of Science and Technology,Mianyang 621010,Sichuan,China;Southwest Bamboo Plant Genetic Resources Conservation and Sustainable Use Sichuan Forestry Grassland Key Laboratory,Mianyang 621010,Sichuan,China)

机构地区：[1]西南科技大学,四川绵阳621010 [2]西南竹类植物遗传资源保护与可持续利用四川林业草原重点实验室,四川绵阳621010

出　　处：《竹子学报》2024年第1期28-35,共8页Journal of Bamboo Research

基　　金：四川省科技计划项目(2021YFYZ0006)。

摘　　要：【目的】为系统研究不同水热温度条件下竹基水热炭理化性质变化。【方法】以梁山慈竹(Dendrocalamus farinosus)为供试材料,基于系列水热温度(453、493、513、533和573 K)制备竹基水热炭,对其元素含量、孔隙结构及表面官能团等理化性质进行表征,并评估其对铀(U^(6+))吸附性能。【结果】梁山慈竹含有丰富的纤维素及半纤维素,在较低温度条件下优先转化为碳微球,有利于形成发达孔隙结构。在低温区(453和493 K)制备的水热炭具备较高产率的同时还具备丰富的官能团,其中493 K温度下制备的竹基水热炭具备最大的比表面积(55.61 m 2·g^(-1))和最小的平均孔径(7.77 nm),具备优质吸附结构特征。而高温区(513、533及573 K)则破坏了其优质吸附结构及官能团。U^(6+)吸附试验结果进一步证实493 K下制备的竹基水热炭对U^(6+)吸附最佳,吸附容量达到12.63 mg·g^(-1)。【结论】梁山慈竹在493 K条件下水热炭化的生物炭对U^(6+)吸附效率更高,在资源化利用及核污染治理方面更具优势。【Objective】To systematically study the changes of physical and chemical properties of bamboo-based hydrothermal charcoal at different hydrothermal temperatures.【Method】In this paper,bamboo-based hydrothermal charcoal was prepared from Dendrocalamus farinosus at a series of hydrothermal temperatures(453,493,513,533 and 573 K),the physicochemical properties of hydrothermal charcoal such as element content,pore structure and surface functional groups were characterized,and the adsorption performance of uranium(U^(6+))was evaluated.【Result】The results showed that:the cultivated D.farinosus was rich in cellulose and hemicellulose,which could be preferentially converted into carbon micro-spheres at lower temperatures,this was conducive to forming the developed pore structures.The hydrothermal charcoal prepared in the low temperature zone contained both high yield and rich functional groups(453 and 493 K),and the bamboo-based hydrothermal charcoal prepared at 493 K temperature had the largest specific surface area(55.61 m 2·g^(-1))and the smallest average pore size(7.77 nm),with the characteristics of high-quality adsorption structure.While the high temperature zone(513,533 and 573 K)had destroyed the high-quality adsorption structure and functional groups.The U^(6+)adsorption test results further confirmed that the bamboo-based hydrothermal charcoal prepared at 493 K was the best for U^(6+)adsorption,and the adsorption capacity reached 12.63 mg·g^(-1).【Conclusion】The U^(6+)adsorption efficiency of hydrothermal charcoal from D.farinosus under the condition of 493 K is higher,and it has more advantages in resource utilization and nuclear pollution control.

关 键 词：温度 梁山慈竹 竹基水热炭 铀 

分 类 号：S795.5[农业科学—林木遗传育种]