气候变化领域集成服务门户(CCPortal): Effect of vermiculite-modified biochar on carbon sequestration potential, mercury adsorption stability, and economics

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DOI	10.1007/s13399-024-05774-0
	Effect of vermiculite-modified biochar on carbon sequestration potential, mercury adsorption stability, and economics
	Ma, Zhirong; Zheng, Dongmei; Liang, Bing; Li, Huiying
发表日期	2024
ISSN	2190-6815
EISSN	2190-6823
英文摘要	Biochar has great potential for climate change mitigation and heavy metal pollution remediation, but is susceptible to aging and expensive to prepare. The aim of this study was to produce biochar materials with long-term stability and cost-effective for heavy metal removal. The physicochemical properties, stability, adsorption performance, and cost-effectiveness of biochar were compared using co-pyrolysis of rice husk (Oryza sativa L.), mulberry twigs (Morus alba L.), and reeds (Phragmites australis (Cav.) Trin. ex Steud) with vermiculite at 500 degree celsius. The results showed that minerals would cover the surface of the biochar while carbothermal reduction reaction occurred to form a stable Si-C system, which enhanced the chemical, thermal, and biochar stability of vermiculite-modified biochar. Both vermiculite-modified biochar enhanced the adsorption capacity and adsorption stability of Hg, and the kinetic adsorption characteristics of Hg before and after biochar modification were consistent with the quasi-secondary kinetic model, and the isothermal adsorption characteristics were more consistent with the Langmuir model. Vermiculite-modified mulberry twig biochar (W-SBC) had the highest removal efficiency (93.48%) due to its large specific surface area and pore structure, with a maximum adsorption capacity of 67.551 mgg-1, and adsorption was dominated by the complexation of -OH and C = O. Economic analysis showed that vermiculite-modified rice husk biochar (W-DBC) had the highest cost-effectiveness with a removal cost of 1.51 USDg-1 Hg. By weighing carbon stability and cost-effectiveness, W-DBC can be used as a cost-effective material to enhance the potential of carbon sequestration and application for Hg pollution remediation.
英文关键词	Biochar; Stability; Mineral modification; Carbon sequestration; Mercury removal; Economic analysis
语种	英语
WOS研究方向	Energy & Fuels ; Engineering
WOS类目	Energy & Fuels ; Engineering, Chemical
WOS记录号	WOS:001236815800002
来源期刊	BIOMASS CONVERSION AND BIOREFINERY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/300542
作者单位	Shenyang University; Shenyang University
推荐引用方式 GB/T 7714	Ma, Zhirong,Zheng, Dongmei,Liang, Bing,et al. Effect of vermiculite-modified biochar on carbon sequestration potential, mercury adsorption stability, and economics[J],2024.
APA	Ma, Zhirong,Zheng, Dongmei,Liang, Bing,&Li, Huiying.(2024).Effect of vermiculite-modified biochar on carbon sequestration potential, mercury adsorption stability, and economics.BIOMASS CONVERSION AND BIOREFINERY.
MLA	Ma, Zhirong,et al."Effect of vermiculite-modified biochar on carbon sequestration potential, mercury adsorption stability, and economics".BIOMASS CONVERSION AND BIOREFINERY (2024).