Cadmium distribution and availability in different particle-size aggregates of post-harvest paddy soil amended with bio-based materials

被引：0

作者：

Luo, Huilong ^{[1
,2
]}

Chen, Juan ^{[3
]}

Yang, Bin ^{[3
]}

Li, Yake ^{[4
]}

Wang, Panpan ^{[1
]}

Yu, Jingjing ^{[1
]}

Yuan, Bei ^{[3
]}

Zhang, Yunhui ^{[3
]}

Ren, Jie ^{[5
]}

Du, Ping ^{[3
]}

Li, Fasheng ^{[1
]}

机构：

[1] State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing,100012, China

[2] Institute of Resources and Environment, Beijing Academy of Science and Technology, Beijing,100089, China

[3] Technical Center for Soil, Agriculture and Rural Ecology and Environment, Ministry of Ecology and Environment, Beijing,100012, China

[4] State Key Laboratory of Water Environment Simulation, School of Environment, Beijing Normal University, Beijing,100875, China

[5] Inner Mongolia Key Laboratory of Environmental Pollution Control and Waste Resource Recycle, School of Ecology and Environment, Inner Mongolia University, Hohhot,010021, China

来源：

Science of the Total Environment | 2024年 / 957卷

基金：

中国国家自然科学基金;

关键词：

Soil pollution;

D O I：

10.1016/j.scitotenv.2024.177739

中图分类号：

学科分类号：

摘要：

Research on the use of organic materials as soil amendments for the remediation of Cd-contaminated agricultural land exists. However, the mechanisms based on which organic materials affect the distribution and availability of Cd in soil aggregates remain unclear. Here, Cd-contaminated paddy soil and different bio-based materials were used for rice pot experiments. Rhizosphere soils were separated into six particle sizes. Cd fractions were analyzed with BCR sequential extraction and specific functional groups associated with Cd were characterized using XPS. We found that bio-based materials promoted the formation of large aggregates to different extents. Cd tended to be enriched in fine- and coarse-grained soil particles, which is mainly related to the soil organic matter. Bio-based materials reduced the relative content of the weak-acid extractable fraction and increased the relative content of the reducible fraction, resulting in soil Cd immobilization. Soil dissolved organic matter (DOM) was the key factor affecting the distribution and availability of Cd in soil aggregates and different organic matter and Cd-binding functional groups in aggregates altered the Cd availability in soil. The results provide insight and guidance for understanding the cadmium immobilization mechanism and screening appropriate materials in the remediation of agricultural land. © 2024 Elsevier B.V.

引用

共 3 条

[1] Distribution and plant availability of heavy metals in different particle-size fractions of soil
Qian, J
Shana, XQ
Wang, ZJ
Tu, Q
SCIENCE OF THE TOTAL ENVIRONMENT, 1996, 187 (02) : 131 - 141
[2] Distribution and plant availability of heavy metals in different particle-size fractions of soil
Sci Total Environ, 2 (131):
[3] Distribution Characteristics of Heavy Metals in Different Particle Size Fractions of Chinese Paddy Soil Aggregates
Gong, Cang
Shao, Yang
Luo, Min
Xu, Diandou
Ma, Lingling
PROCESSES, 2023, 11 (07)

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