Reclamation of co-pyrolyzed dredging sediment as soil cadmium and arsenic immobilization material: Immobilization efficiency, application safety, and underlying mechanisms

doi:10.1016/j.jenvman.2024.122753

	Reclamation of co-pyrolyzed dredging sediment as soil cadmium and arsenic immobilization material: Immobilization efficiency, application safety, and underlying mechanisms
	Liu, Qunqun 1; Sheng, Yanqing1,2 ; Liu, Xiaozhu 1,3; Wang, Zheng 1,3
发表期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN	0301-4797
	2024-11-01
卷号	370 页码:17
关键词	Dredging sediment Toxic metals Resource utilization Soil immobilization Agricultural utilization Biochar
DOI	10.1016/j.jenvman.2024.122753
通讯作者	Sheng, Yanqing()
英文摘要	The safe management of toxic metal-polluted dredging sediment (DS) is imperative owing to its potential secondary hazards. Herein, the co-pyrolysis product (DS@BC) of polluted DS was creatively applied to immobilize soil Cd and As to achieve DS resource utilization, and the efficiency, safety, and mechanism were investigated. The results revealed that the DS@BC was more effective at reducing soil Cd bioavailability than the DS was (58.9-73.2% vs. 21.8-27.4%), except for the dilution effect, whereas the opposite phenomenon occurred for soil As (25.5-35.7% vs. 35.7-42.8%). The DS@BC immobilization efficiency was dose-dependent for both Cd and As. Soil labile Cd and As were transformed to more stable fractions after DS@BC immobilization. DS@BC immobilization inhibited the transfer of soil Cd and As to Brassica chinensis L. and did not cause excessive accumulation of other toxic metals in the plants. The appropriate addition of the DS@BC (8%) sufficiently alleviated the oxidative stress response of the plants and enhanced their growth. These findings indicate that the DS@BC was safe and effective for soil Cd and As immobilization. DS@BC immobilization decreased the diversity and richness of the rhizosphere soil bacterial community because of the dilution effect. The DS@BC immobilized soil Cd and As via direct adsorption, and indirect increasing soil pH, and regulating the abundance of specific beneficial bacteria (e.g., Bacillus). Therefore, the use of co-pyrolyzed DS as a soil Cd and As immobilization material is a promising resource utilization method for DS. Notably, to verify the long-term effects and safety of DS@BC immobilization, field trials should be conducted to explore the effectiveness and risk of harmful metal release from DS@BC immobilization under real-world conditions.
资助机构	National Natural Science Foundation of China ; Shandong Provincial Natural Science Foun-dation ; Special Research Assistant Program of the Chinese Academy of Sciences
收录类别	SCI
语种	英语
关键词[WOS]	LONG-TERM ; ABUNDANCE ; BIOCHAR ; METALS ; GENES
研究领域[WOS]	Environmental Sciences & Ecology
WOS记录号	WOS:001332759300001
引用统计
文献类型	期刊论文
条目标识符	http://ir.yic.ac.cn/handle/133337/37154
专题	中国科学院海岸带环境过程与生态修复重点实验室中国科学院海岸带环境过程与生态修复重点实验室_海岸带环境工程技术研究与发展中心
通讯作者	Sheng, Yanqing
作者单位	1.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Zone Environm Proc & Ecol Remediat, Yantai 264003, Shandong, Peoples R China 2.Shandong Acad Environm Planning, State Environm Protect Key Lab & Sea Ecol Governan, Jinan 250101, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Liu, Qunqun,Sheng, Yanqing,Liu, Xiaozhu,et al. Reclamation of co-pyrolyzed dredging sediment as soil cadmium and arsenic immobilization material: Immobilization efficiency, application safety, and underlying mechanisms[J]. JOURNAL OF ENVIRONMENTAL MANAGEMENT,2024,370:17.
APA	Liu, Qunqun,Sheng, Yanqing,Liu, Xiaozhu,&Wang, Zheng.(2024).Reclamation of co-pyrolyzed dredging sediment as soil cadmium and arsenic immobilization material: Immobilization efficiency, application safety, and underlying mechanisms.JOURNAL OF ENVIRONMENTAL MANAGEMENT,370,17.
MLA	Liu, Qunqun,et al."Reclamation of co-pyrolyzed dredging sediment as soil cadmium and arsenic immobilization material: Immobilization efficiency, application safety, and underlying mechanisms".JOURNAL OF ENVIRONMENTAL MANAGEMENT 370(2024):17.