| 粉葛对镉、砷和铅复合污染农田土壤的修复潜力 |
| 摘要点击 659 全文点击 74 投稿时间：2024-04-09 修订日期：2024-05-30 |
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| 中文关键词 重金属复合污染土壤 粉葛 土壤重金属移除率 富集特征 修复潜力 |
| 英文关键词 heavy metal combined pollution soils Pueraria thomsonii Benth. soil heavy metal removal rate enrichment characteristics remediation potential |
| 作者 | 单位 | E-mail | | 林小兵 | 江西农业大学国土资源与环境学院, 南昌 330045
江西省红壤及种质资源研究所国家红壤改良工程技术研究中心/江西省受污染耕地安全利用工程研究中心, 南昌 331717 | linxiaobing14@mails.ucas.ac.cn | | 何检荣 | 铅山县农业农村局, 铅山 334500 | | | 吴多基 | 江西农业大学国土资源与环境学院, 南昌 330045 | | | 尧娟 | 黎川县农业农村局, 黎川 344600 | | | 周利军 | 江西省红壤及种质资源研究所国家红壤改良工程技术研究中心/江西省受污染耕地安全利用工程研究中心, 南昌 331717 | | | 彭君 | 萍乡市农业科学研究中心, 萍乡 337000 | | | 王斌强 | 江西省红壤及种质资源研究所国家红壤改良工程技术研究中心/江西省受污染耕地安全利用工程研究中心, 南昌 331717 | | | 何绍浪 | 江西省红壤及种质资源研究所国家红壤改良工程技术研究中心/江西省受污染耕地安全利用工程研究中心, 南昌 331717 | | | 黄尚书 | 江西省红壤及种质资源研究所国家红壤改良工程技术研究中心/江西省受污染耕地安全利用工程研究中心, 南昌 331717 | | | 武琳 | 江西省红壤及种质资源研究所国家红壤改良工程技术研究中心/江西省受污染耕地安全利用工程研究中心, 南昌 331717 | | | 吴建富 | 江西农业大学国土资源与环境学院, 南昌 330045 | wjf6711@126.com |
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| 中文摘要 |
| 为探究粉葛对镉（Cd）、砷（As）和铅（Pb）复合污染土壤的修复潜力,通过大田试验研究了不同区域农田土壤Cd、As和Pb复合污染下粉葛（花叶葛和赣葛2号）的生长特性、富集特征及修复潜力. 结果表明,粉葛整株生物量（干重）为4.58~12.45 t·hm-2,其中花叶葛整株生物量高于赣葛2号. 粉葛各部位中ω（Cd）、ω（AS）和ω（Pb）范围分别为1.63~17.04、0.15~20.97和0.40~231.12 mg·kg-1；对Cd、As和Pb的积累量分别为14.01~109.06、4.10~27.59和49.97~305.69 g·hm-2；移除率分别为0.40%~2.57%、0.02%~0.08%和0.06%~0.09%；富集系数分别为0.09~13.12、0.01~0.38和0.01~0.76；转运系数分别为0.50~4.72、1.27~15.89和1.19~35.68. 其中,花叶葛主藤中Cd、As和Pb含量及As积累量和移除率均显著高于赣葛2号（P<0.05）. 生物量主要集中在块根,而重金属含量和积累量主要集中在茎秆和叶片. 相关分析表明,土壤Cd含量与粉葛主藤和叶片中Cd含量均呈显著正相关（P<0.05）；土壤Pb含量与粉葛各部位Pb含量呈显著正相关（P<0.05）. 除湘东试验区花叶葛外,粉葛经济部分——葛粉中重金属含量均低于药用植物的标准限值. 综上,粉葛对Cd、As和Pb具有较强的吸收和转运能力,花叶葛可作为重度Cd为主的复合污染土壤修复的潜力富集植物,赣葛2号（用作葛粉）为轻中度Cd为主的复合污染土壤修复的潜力富集植物. |
| 英文摘要 |
| This study investigated the growth, enrichment characteristics, and remediation potential of Pueraria thomsonii Benth. （“Hua ye ge” and “Gan ge er hao”） on cadmium （Cd）, arsenic （As）, and lead （Pb）-contaminated soils, the remediation potential of P. thomsonii in a large field experiment under different trial fields. The results showed that the whole plant biomass （dry weight） of P. thomsonii was 4.58-12.45 t·hm-2, and the biomass of “Hua ye ge” was higher than that of “Gan ge er hao.” The contents of Cd, As, and Pb in different parts of P. thomsonii were 1.63-17.04, 0.15-20.97, and 0.40-231.12 mg·kg-1, respectively. The accumulations of Cd, As, and Pb of P. thomsonii were 14.01-109.06, 4.10-27.59, and 49.97-305.69 g·hm-2, respectively. The removal rates of Cd, As, and Pb of P. thomsonii were 0.40%-2.57%, 0.02%-0.08%, and 0.06%-0.09%, respectively. The bioconcentration factors of P. thomsonii for Cd, As, and Pb were 0.09-13.12, 0.01-0.38, and 0.01-0.76, respectively, and the translocation factors were 0.50-4.72, 1.27-15.89, and 1.19-35.68, respectively. Among them, the contents of Cd, As, and Pb in the main vine and the As accumulation and removal rate of “Hua ye ge” were all significantly higher than that of “Gan ge er hao” （P < 0.05）. The biomass was mainly concentrated in the tuber, while the heavy metal content and accumulation was mainly concentrated in the stem and leaf. Correlation analysis showed a significant positive correlation between soil Cd content and Cd content in the main vine and leaf of P. thomsonii （P < 0.05）. A significant positive correlation was observed between soil Pb content and Pb content in all parts of P. thomsonii （P<0.05）. Except for “Hua ye ge” in Xiangdong, the content of heavy metals in the commercial P. thomsonii portion （arrowroot） was lower than the standard limit for medicinal plants. In summary, the P. thomsonii showed strong absorption and transport capacity for Cd, As, and Pb. “Hua ye ge” was selected as a potential enrichment plant source for the remediation of severe Cd-based combined contaminated soil. Additionally, “Gan ge er hao” （used as Pueraria powder） was selected as a potential enrichment plant for the remediation of mild and moderate Cd-contaminated soil. |
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