CO_(2)removal with enhanced wollastonite weathering in acidic and calcareous soils  

作　　者：Chenxia Su Ronghua Kang Wentao Huang Ang Wang Xue Li Kai Huang Qiang Zhou Yunting Fang 

机构地区：[1]Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China [2]Key Laboratory of Isotope Techniques and Applications,Shenyang 110016,China [3]CAS Key Laboratory of Forest Ecology and Silviculture,Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016,China [4]College of Land and Environment,Shenyang Agricultural University,Shenyang 110866,China [5]Weifang Academy of Modern Agriculture and Ecological Environment,Weifang 261052,China [6]Northeast Geological S&T Innovation Center of China Geological Survey,Shenyang 110034,China [7]Key Laboratory of Black Soil Evolution and Ecological Effect,Shenyang 110034,China

出　　处：《Soil Ecology Letters》2025年第1期121-131,共11页土壤生态学快报(英文)

基　　金：financially supported by the National Key Research and Development Program of China(Grant No.2023YFD1500800);the Liaoning Province“Doctoral Scientific research Foundation”Project(Grant No.2022-BS-021);the Northeast Geological S&T Innovation Center of China Geological Survey(Grant Nos.QCJJ2023-45 and QCJJ2022-21);the National Natural Science Foundation of China(Grant No.42277231).

摘　　要：The application of silicate rock powder to agricultural soils is a promising strategy for atmospheric CO_(2)removal.However,most research focuses on inorganic carbon sequestration via enhanced rock weathering,overlooking its impact on soil organic carbon(SOC)decomposition,which is essential for quantifying net CO_(2)removal.To address this gap,we conducted a 233-day incubation experiment to investigate the impact of wollastonite powder on soil CO_(2)emissions,SOC decomposition,pH,and cation concentrations across three agricultural soils with pH levels of 4.4,5.6,and 7.7.Results showed 89.0%and 74.4%rock powder weathering in the most acidic and alkaline soils,respectively.In acidic soils,wollastonite powder addition increased CO_(2)emissions due to the release of intrinsic CaCO_(3)containing in wollastonite or/and SOC.However,these CO_(2)emissions accounted for less than 20%of the total CO_(2)removal by wollastonite weathering.In contrast,alkaline soils experienced a reduction in CO_(2)emissions with wollastonite powder amendment.Net CO_(2)removal for soils with pH 4.4 and 7.7 were 1.0 and 1.1 g C kg−1 soil,respectively.This study confirms that wollastonite weathering is effective for CO_(2)mitigation regardless of soil pH.

关 键 词：enhanced rock weathering wollastonite powder soil organic carbon soil CO_(2)emissions weathering rate 

分 类 号：S15[农业科学—土壤学]