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| 不同叶用黄麻种质对重金属吸附的差异及其机制分析 |
| Differential adsorption performance and mechanism of leaf-used jute germplasm for heavy metal removal |
| Received:October 24, 2019 |
| DOI：10.13254/j.jare.2019.0523 |
| 中文关键词: 黄麻叶，种质，筛选，重金属，差异吸附 |
| 英文关键词: jute leaf, germplasms, screening, heavy metals, differential adsorption |
| 基金项目:中国农业科学院科技创新工程协同创新任务（CAAS-XTCX2016015） |
| Author Name | Affiliation | E-mail | | DENG Can-hui | Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China | | | TANG Qing | Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China | | | DAI Zhi-gang | Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China | | | YANG Ze-mao | Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China | | | CHENG Chao-hua | Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China | | | XU Ying | Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China | | | CHEN Xiao-jun | Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China | | | LIU Chan | Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China | | | CHEN Ji-quan | Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China | | | SU Jian-guang | Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha 410205, China | jgsu@vip.163.com |
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| 中文摘要: |
| 为筛选对重金属具有高效吸附能力的叶用黄麻种质，以36个栽培黄麻种质为研究对象，将黄麻干叶制成粉末，研究其对水体中重金属离子Cu（Ⅱ）、Pb（Ⅱ）、Cd（Ⅱ）和Cr（Ⅵ）的去除特性。结果表明：不同黄麻种质干叶对同种重金属的去除效果不同；且同种黄麻种质干叶对不同重金属的去除效果也有明显差异。黄麻叶对重金属阳离子具有一定的选择吸附特性，且选择性吸附顺序为Cu（Ⅱ） < Pb（Ⅱ） < Cd（Ⅱ），其中对Cd（Ⅱ）和Pb（Ⅱ）的最高吸附容量分别为20.62、14.19 mg·g-1，对Cu（Ⅱ）的吸附容量最高则为9.53 mg·g-1，而黄麻叶对络阴离子Cr（Ⅵ）的去除效果受种质的影响较大，吸附容量最高可达25.79 mg·g-1，最低仅为1.46 mg·g-1。黄麻种质HMG-2对Cd（Ⅱ）有较好的吸附效果，吸附等温线符合Langmuir模型，最大理论吸附容量可达30.29 mg·g-1。研究表明，黄麻种质HMG-1和HMG-2可考虑作为吸附重金属阳离子的专用种质，而黄麻种质竹昌麻和HMG-4则可考虑作为吸附络阴离子的专用种质；不同黄麻种质干叶对同种重金属的吸附容量不同，主要与黄麻叶片中的富含活性官能团的物质（如纤维素、半纤维素和木质素等）含量有关。 |
| 英文摘要: |
| In order to screen the jute germplasm with high adsorption ability for heavy metal, 36 cultivated jute germplasms were used as research objects. The dry jute leaves were pulverized, and their removal performance for heavy metal ions Cu(Ⅱ), Pb(Ⅱ), Cd(Ⅱ), and Cr(Ⅵ)in water was measured. The results showed that there was a significant difference in removal efficiency of the same heavy metal by dry leaves from different jute germplasm, and the removal efficiency of the same jute germplasm dry leaves on different types of heavy metals, was also significantly different. The selective adsorption of heavy metal cations by jute leaves was Cu(Ⅱ) -1, and 9.53 mg·g-1, respectively. The removal efficiency of heavy metal anion Cr(Ⅵ)by jute leaves was significantly different owing to different germplasms. The highest removal capacity was 25.79 mg·g-1 while the lowest was only 1.46 mg·g-1. "HMG-2" exhibited high efficiency for Cd(Ⅱ)removal and the adsorption data fitted well with the Langmuir model. Based on above results, "HMG-1" and "HMG-2" could be considered as special germplasms for heavy metal cation adsorption, while "zhuchangma" and "HMG-4" could be considered for heavy metal anion adsorption. Different jute germplasms have different adsorption capacities for the same heavy metal, which is mainly related to the substance content rich in active functional groups such as cellulose, hemicellulose, and lignin in jute leaves. |
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