文献类型： 外文期刊

作者： Rizwan, Muhammad ¹ ; Murtaza, Ghulam ⁴ ; Ahmed, Zeeshan ⁵ ; Lin, Qimei ³ ; Chen, Xuejiao ³ ; Khan, Imran ⁹ ; Abdelrahman, Hamada ¹⁰ ; Antoniadis, Vasileios ¹¹ ; Ali, Esmat F. ¹² ; Lee, Sang Soo ¹³ ; Leng, Lijian ¹ ; Shaheen, Sabry M. ¹⁴ ; Li, Hailong ¹ ;

作者机构： 1.Cent South Univ, Sch Energy Sci & Engn, Changsha 410083, Hunan, Peoples R China

2.Xiangjiang Lab, Changsha 410205, Peoples R China

3.China Agr Univ, Coll Land Sci & Technol, Beijing 100193, Peoples R China

4.Yunnan Univ, Sch Agr, Kunming 650500, Yunnan, Peoples R China

5.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Urumqi 830011, Peoples R China

6.Chinese Acad Sci, Cele Natl Stn Observat & Res Desert Grassland Ecos, Urumqi 848300, Peoples R China

7.Guangdong Acad Agr Sci, Agr Resources & Environm Inst, Guangzhou 510640, Peoples R China

8.Xihua Univ, Sch Food Sci & Bioengn, Chengdu 610039, Peoples R China

9.Zhejiang Normal Univ, Inst Phys Chem, Zhejiang Key Lab React Chem Solid Surfaces, Jinhua 321004, Peoples R China

10.Cairo Univ, Fac Agr, Soil Sci Dept, Giza 12613, Egypt

11.Univ Thessaly, Dept Agr Crop Prod & Rural Environm, Volos, Greece

12.Taif Univ, Coll Sci, Dept Biol, Taif 21944, Saudi Arabia

13.Yonsei Univ, Dept Environm & Energy Engn, Wonju 26493, South Korea

14.Univ Wuppertal, Inst Fdn Engn, Sch Architecture & Civil Engn, Lab Soil & Groundwater Management, Pauluskirchstr 7, D-42285 Wuppertal, Germany

关键词： Soil toxic metals; Green remediation; Modified biochar; Intercropping system; Shared rhizosphere

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：8.0； 五年影响因子：8.7 ）

ISSN： 0048-9697

年卷期： 2024 年 954 卷

页码：

收录情况： SCI

摘要： The effects of engineered steam exploded biochar on the phytoavailability of toxic elements in the shared- and nonshared-rhizosphere of vegetable-grass intercropping system have not been investigated yet. Therefore, we explored and elucidated the synergistic effect of pristine rape-straw biochar (BC), steam exploded BC (BCSE), KMnO4-modified 4-modified BCSE (BCSEMn), and hydroxyapatite-modified BCSE (BCSEHA) on the solubility, fractionation and phytoavailability of lead (Pb) in a vegetable-grass intercropping system. In a rhizosphere box, Brassica chinensis L. . (pakchoi; PC, as a vegetable) and Pennisetum polystachion L. . (mission grass; MG, as a Pb hyper- accumulator), were grown in the biochar treated soil with (non-shared rhizosphere) or without (shared rhizosphere) root separation. Addition of BCSEMn and BCSEHA, particularly BCSEMn, significantly improved plant growth, photosynthetic pigment levels, and positively influenced the gas exchange attributes by suppressing oxidative stress and boosting antioxidant enzymes activities. Both biochars altered a proportion of Pb in the acid soluble to the immobile fraction and thus significantly decreased its leachability (TCLP-Pb) and bioavailability (CaCl2-extrcated 2-extrcated Pb) by 32.7 %-33.9 % and 48.5 %-53.5 %, respectively, as compared to the control. Both biochars, particularly BCSEMn, reduced significantly the Pb content in shoots and roots of PC and MG with a significantly higher efficiency in the PC than in the MG; this was the case more in the shared than in the non- shared rhizosphere. These findings indicate the synergistic effect of BCSEMn and BCSEHA and intercropping for enhancing the grass phytostabilization capacity for Pb and reducing its uptake by edible plants in a vegetables-grass system, which could be used as a promising approach for the phytomanagement of Pb contaminated soils.