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CO_(2) mineralization by typical industrial solid wastes for preparing ultraﬁne CaCO_(3): A review

Green Energy & Environment 2024年第11期9卷 1679-1697页

作者： Run Xu Fuxia Zhu Liang Zou Shuqing Wang Yanfang Liu Jili Hou Chenghao Li Kuntong Song Lingzhao Kong Longpeng Cui Zhiqiang Wang Department of Coal and Syngas Conversion Sinopec Research Institute of Petroleum Processing CO.Ltd.Beijing100083China School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou215000China

Mineral carbonation is a promising CO_(2) sequestration strategy that can utilize industrial wastes to convert CO_(2) into high-value CaCO_(3).This review summarizes the advancements in CO_(2) mineralization using typical industrial wastes to prepare ultraﬁne CaCO_(3).This work surveys the mechanisms of CO_(2) mineralization using these wastes and its capacities to synthesize CaCO_(3),evaluates the effects of carbonation pathways and operating parameters on the preparation of CaCO_(3),analyzes the current industrial application status and economics of this *** to the large amount of impurities in solid wastes,the purity of CaCO_(3) prepared by indirect methods is greater than that prepared by direct *** CaCO_(3) includes three *** polymorph of CaCO_(3) synthesized by carbonation process is determined the combined effects of various *** parameters essentially impact the nucleation and growth of CaCO_(3) by altering the CO_(2) supersaturation in the reaction system and the surface energy of CaCO_(3) *** the initial pH of the solution and the CO_(2)ﬂow rate favors the formation of vaterite,but calcite is formed under excessively high *** formation is favored at lower temperatures and residence *** increased temperature and prolonged residence time,it passes through aragonite metastable phase and eventually transforms into ***,polymorph modiﬁers can decrease the surface energy of CaCO_(3) grains,facilitating the synthesis of ***,the large-scale application of this technology still faces many problems,including high costs,high energy consumption,low calcium leaching rate,low carbonation efﬁciency,and low product ***,it is necessary to investigate ways to accelerate carbonation,optimize operating parameters,develop cost-effective agents,and understand the kinetics of CaCO_(3) nucleation and crystallization to obtain products with speciﬁc crystal ***

关键词： industrial solid wastes Resource utilization Mineral carbonation Ultraﬁne CaCO_(3) Carbon emission reduction

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Environmental risk for application of ammonia-soda white mud in soils in China

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Journal of Integrative Agriculture 2020年第3期19卷 601-611页

作者： WANG Xiao-bin YAN Xiang LI Xiu-ying Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences

In recent years,some reports,mainly from Chinese research,show that there has been an increasing trend in the use of ammonia-soda residue(ASR)(or called ammonia-soda white mud) as a soil conditioner in *** to now,the studies on ASR have focused on its utilization for acid soil amendment in agriculture,but few studies have assessed its environmental *** contains pollutant elements such as mercury(Hg),cadmium(Cd),copper(Cu) and fluorine(F) and the purpose of this study was to review research on the environmental impacts of ASR application in *** obtained from 23 research reports indicate that the concentrations of Hg,Cd,Cu,F and Cl(0-170,0.01-2.8,4.5-200,2000-24700 and 1 600-188 000 mg kg^-1,respectively) in ASR may exceed the limits(≤0.5,≤0.3 and ≤50 mg kg^-1 for Hg,Cd and Cu,respectively) of Chinese Risk Screening Values for Soil Contamination of Agricultural Land(GB 15618-2018 2018) or the refereed critical value(≤800 and ≤200 mg kg^-1 for F and Cl,respectively) based on Chinese *** concentrations of the elements Hg,Cd,Cu,F and Cl in the leachate of ASR detected by the extraction tests also exceed the limits(Class IV-V) of the Chinese Standard for Groundwater Quality(GB/T 14848-2017 2017).Based on the above results,it is suggested that ASR without any pretreatment for reducing harmful pollutants should not be used for soil remediation or conditioning of farmlands,to ensure soil health,food safety and environmental quality.

关键词： environmental safety risk heavy metals industrial solid wastes ammonia-soda white mud ammonia-soda residue

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