Study on the Effects of Different Preparation Temperatures on the Physicochemical Properties of the Hydrothermal Charcoal of Dendrocalamus farinosus
-
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(U6+)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 m2·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。U6+吸附试验结果进一步证实493 K下制备的竹基水热炭对U6+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U6+吸附效率更高,在资源化利用及核污染治理方面更具优势。Abstract: 【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 (U6+) 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 m2·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 U6+ adsorption test results further confirmed that the bamboo-based hydrothermal charcoal prepared at 493 K was the best for U6+ adsorption,and the adsorption capacity reached 12.63 mg·g-1. 【Conclusion】 The U6+ 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.
-
Key words:
- Temperature /
- Dendrocalamus farinosus /
- Bamboo-based hydrothermal charcoal /
- Uranium
-
陈莽. 改性活性炭吸附水中典型重金属的试验研究[D]. 重庆:重庆大学,2015. 陈相雪. 木质纤维素预处理工艺及利用其生产秸秆乙醇的研究[D]. 南京:南京理工大学,2022. 陈煊,李玉玲,许多,等. 水稻结实期茎秆物质组分的变化动态及其与抗折性的关系[J]. 耕作与栽培,2014,34(4):1-3,32. 范国荣,黄敏,王宗德,等. 低温竹炭对Cr(Ⅵ)吸附性能的研究[J]. 浙江林业科技,2010,30(4):53-55. 范明霞,童仕唐. 活性炭孔隙结构对重金属离子吸附性能的影响[J]. 功能材料,2016,47(1):1012-1016. 高艳辉,诸洪达,樊体强,等. 贫铀的危害及其测定[J]. 中国辐射卫生,2009,18(4):505-506. 郭维俊,王芬娥,黄高宝,等. 小麦茎秆力学性能与化学组分试验[J]. 农业机械学报,2009,40(2):110-114. 韩军,侯京伟,胡胜. 水热炭球的制备与表征[J]. 原子能科学技术,2013,47(12):2380-2383. 吉聪辉,侯玉晶. 构建中国现代竹产业园的思考[J]. 世界竹藤通讯,2020,18(4):70-73,78. 李殿鑫,阳亦青,肖思友,等. 棕榈纤维生物炭的制备及其对U(Ⅵ)的吸附性能[J]. 矿冶工程,2021,41(5):159-162. 李天泽,董媛媛,布和巴特尔,等. U(Ⅵ)吸附材料的制备及其吸附性能的研究进展[J]. 黑龙江工程学院学报,2022,36(5):8-16. 刘倩,邓文勇,袁敏,等. 竹炭的制备及其开发利用研究进展[J]. 应用化工,2022,51(9):2736-2741. 马丽,宋申,杨光智. 纤维素基多孔碳的制备及其CO2吸附性能研究[J]. 有色金属材料与工程,2021,42(4):27-32. 毛明月,赵振勇,王守乐,等. 5种盐生植物生物炭产率及其理化性质[J]. 干旱区研究,2019,36(6):1494-1501. 汤锋. 全竹化学利用的思考[J]. 世界竹藤通讯,2019,17(6):5-8. TONG Thi Phuong,马中青,陈登宇,等. 基于热重红外联用技术的竹综纤维素热解过程及动力学特性[J]. 浙江农林大学学报,2014,31(4):495-501. 汪清焰,刘斌美,杨阳,等. 水稻脆茎突变体细胞壁组分与茎秆力学性能的研究[J]. 生物学杂志,2020,37(1):26-29. 王健,朱锦懋,林青青,等. 小麦茎秆结构和细胞壁化学成分对抗压强度的影响[J]. 科学通报,2006,51(6):679-685. 王哲,易发成,冯媛. 铀在木纤维上的吸附行为及机理分析[J]. 原子能科学技术,2015,49(2):263-272. 伍婵翠,梁英,李京鸿,等. 改性竹炭对水溶液中Cu(Ⅱ)、Cd(Ⅱ)的吸附性能[J]. 材料科学与工程学报,2015,33(3):377-381,419. 伍希,何少华,王丹,等. 竹炭对水中重金属离子的吸附[J]. 水科学与工程技术,2014(6):12-15. 伍希. 竹炭及改性竹炭对废水中Pb(Ⅱ)和Cd(Ⅱ)的吸附性能研究[D]. 衡阳:南华大学,2016. 徐明,邱木清. 核桃壳生物炭吸附水中铀的研究[J]. 安徽农业科学,2021,49(7):70-73. 杨凡钦. 不同基因型梁山慈竹材性特征及其水热炭对铀吸附研究[D]. 绵阳:西南科技大学,2021. 杨华,黄丽,刘石彩,等. 竹屑热解过程及产物特征研究[J]. 太阳能学报,2017,38(5):1431-1439. 臧宇飞. 芦苇秸秆水热炭制备工艺开发及其在镉污染土壤修复中的应用研究[D]. 济南:山东建筑大学,2023. 张文标,陈斌,王伟龙,等. 雷竹炭理化性质及Hg2+吸附性能测定[J]. 浙江林业科技,2009a,29(2):33 -37. 张文标,钱新标,马灵飞. 不同炭化温度的竹炭对重金属离子的吸附性能[J]. 南京林业大学学报(自然科学版),2009b,33(6):20-24. Fahad S A,Nawab M S,Shaida M A,et al. Carbon based adsorbents as efficient tools for the removal of U(Ⅵ) from aqueous medium:A state of the art review[J]. Journal of Water Process Engineering,2023,52:103458. Falco C,Baccile N,Titirici M M. Morphological and structural differences between glucose,cellulose and lignocellulosic biomass derived hydrothermal carbons[J]. Green Chemistry,2011,13(11):3273-3281. Lawal A A,Hassan M A,Zakaria M R,et al. Effect of oil palm biomass cellulosic content on nanopore structure and adsorption capacity of biochar[J]. Bioresource Technology,2021,332:125070. Liang F,Wang R J,Xiang H Z,et al. Investigating pyrolysis characteristics of moso bamboo through TG-FTIR and Py-GC/MS[J]. Bioresource Technology,2018,256:53-60. Liao H,Yu J,Zhu W K,et al. Nano-zero-valent Fe/Ni particles loaded on collagen fibers immobilized by bayberry tannin as an effective reductant for uranyl in aqueous solutions[J]. Applied Surface Science,2020,507:145075. Zhang S,Sheng K C,Yan W,et al. Bamboo derived hydrochar microspheres fabricated by acid-assisted hydrothermal carbonization[J]. Chemosphere,2021,263:128093. Zhao W H,Lin X Y,Cai H M,et al. Preparation of Mesoporous Carbon from Sodium Lignosulfonate by Hydrothermal and Template Method and Its Adsorption of Uranium(Ⅵ)[J]. Industrial & Engineering Chemistry Research,2017,56(44):12745-12754.
点击查看大图
计量
- 文章访问数: 33
- HTML全文浏览量: 2
- PDF下载量: 7
- 被引次数: 0