Biochar-assisted transformation of engineered-cerium oxide nanoparticles: Effect on wheat growth, photosynthetic traits and cerium accumulation

被引：44

作者：

Abbas, Qumber ^{[1
,2
]}

Liu, Guijian ^{[1
,2
]}

Yousaf, Balal ^{[1
,2
]}

Ali, Muhammad Ubaid ^{[1
]}

Ullah, Habib ^{[1
]}

Munir, Mehr Ahmed Mujtaba ^{[1
]}

Ahmed, Rafay ^{[1
]}

Rehman, Abdul ^{[1
]}

机构：

[1] Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Anhui, Peoples R China

[2] Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Shaanxi, Peoples R China

来源：

ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY | 2020年 / 187卷

基金：

中国博士后科学基金; 中国国家自然科学基金;

关键词：

CeO(2)NPs; Biochar; Triticum aestivum L; Photosynthesis; NPs transformation; CEO2; NANOPARTICLES; ORGANIC-MATTER; SILVER NANOPARTICLES; PHASEOLUS-VULGARIS; SURFACE-CHEMISTRY; L; SOIL; PLANTS; TRANSLOCATION; AMENDMENTS;

D O I：

10.1016/j.ecoenv.2019.109845

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The extensive use of nano-fabricated products in daily life is releasing a large volume of engineered nanoparticles (ENPs) in the environment having unknown consequences. Meanwhile, little efforts have been paid to immobilize and prevent the entry of these emerging contaminants in the food chain through plant uptake. Herein, we investigated the biochar role in cerium oxide nanoparticles (CeO(2)NPs) bioaccumulation and subsequent translocation in wheat (Triticum aestivurn L.) as well as impact on growth, photosynthesis and gasexchange related physiological parameters. Results indicated that CeO(2)NPs up to 500 mg L-1 level promoted the plant growth by triggering photosynthesis, transpiration and stomatal conductance. Higher NPs concentration (2000 mg CeO(2)NPs L-1) has negatively affected the plant growth and photosynthesis related processes. Conversely, biochar amendment with CeO(2)NPs considerably reduced (-9 folds) the plants accumulated contents of Ce even at 2000 mg L-1 exposure level of CeO(2)NPs through surface complexation process and alleviated the phyto-toxic effects of NPs on plant growth. XPS and FTIR analysis confirmed the role of biochar-mediated carboxylate and hydroxyl groups bonding with CeO(2)NPs. These findings provides an inside mechanistic understanding about biochar interaction with nano-pollutants to inhibit their bioavailability to plant body.

引用

页数：12

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