SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Jia Li,Guoquan Zhang,Mingzhi Luo,Gaomiao Li,Jun He
Salt lakes are abundant in three crucial resources − lithium(Li), magnesium(Mg), and boron(B). The separation efficiency of these resources is low, the excessive use of acid and the environmental harm caused by the accumulation of magnesium source after Li + extraction still exist. In this work, a new process of step-by-step extraction of B-Li and Mg mineralisation is proposed to separate the three resources. Boron was extracted using 2-ethyl-1,3-hexanediol (EHD) + kerosene, and it was found that the addition of FeCl 3 could significantly improve the boron extraction rate(E). In the R(O:A) = 1:3, 40 %EHD + 60 %kerosene, adding 0.15 mol/L FeCl 3 , after three-stage countercurrent extraction, the E(B 3+ ) reached 99 %, E(Fe 3+ ), E(Li + ) and E(Mg 2+ ) less than 4 %. Tributyl Phosphate (TBP)-Ionic Liquids (ILs)-kerosene-FeCl 3 system was used to extract Li + , the ILs and FeCl 3 existed in the extraction process with a competitive behaviour. The extraction efficiency of lithium was improved by cationic [C 4 mim + ] exchange reaction. Under the conditions of R(O:A) = 1:1, 5 %ILs + 65 %TBP + 30 %kerosene, and three-stage extraction, the E(Li + ) was reached 91 %. (NH 4 ) 2 CO 3 was used to mineralise the magnesium resources. At a reaction temperature of 40 °C, the product was magnesium carbonate trihydrate(MgCO 3 ·3H 2 O) with a smooth surface and rod-like structure, and the conversion rate reached 85 %. At 75 °C, the product was an irregular spheroidal basic magnesium carbonate(4MgCO 3 ·Mg(OH) 2 ·5H 2 O) with a magnesium conversion of 91.7 %.
研究领域:
化学工程
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环境科学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2024
·
IF 7.4
Xiongxiong Zhang,Mei Yang,Yonggang Sun,Yuanyuan Li,Yulong Ma,Wenxin Ji
The indirect mineralization of CO 2 by industrial solid waste is an essential process for CO 2 immobilization; however, many technical challenges remain to be overcome. In this study, carbide slag (CS), a type of industrial solid waste, was used as a raw material for the indirect mineralization of CO 2 using glycine. In the extraction stage, the ion extraction efficiency of Ca significantly increased to 68.5 % due to the formation of a chelate between glycine and Ca, which enhanced Ca dissolution. Analysis of the mineralization process revealed that glycine was recycled after absorbing CO 2 , leading to increased CO 2 absorption capacity because of the high alkalinity of the extract solution. Furthermore, there was a synergistic effect between CO 2 absorption and the Ca precipitation reaction. This synergistic effect increased the reaction rate of mineralization and enhanced its efficiency. As a result, the Ca precipitation reaction was largely complete within 5 min, and the mineralization efficiency was enhanced to 93 %. Furthermore, the recirculation (indirect mineralization) results showed that the Ca extraction and mineralization efficiencies remained constant during each cycle. Most importantly, glycine could be regenerated automatically during the cycle, which proved that the cyclic indirect mineralization process could operate stably.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE & TECHNOLOGY
·
2023
·
IF 11.4
Jia Shi,Zi Wang,Yumei Peng,Zhongmin Fan,Ziyun Zhang,Xiang Wang,Kun Zhu,Jianying Shang,Jie Wang
Although our understanding of the effects of microplastics on the dynamics of soil organic matter (SOM) has considerably advanced in recent years, the fundamental mechanisms remain unclear. In this study, we examine the effects of polyethylene and poly(lactic acid) microplastics on SOM processes via mineralization incubation. Accordingly, we evaluated the changes in carbon dioxide (CO2) and methane (CH4) production. An O2 planar optical sensor was used to detect the temporal behavior of dissolved O2 during incubation to determine the microscale oxygen heterogeneity caused by microplastics. Additionally, the changes in soil dissolved organic matter (DOM) were evaluated using a combination of spectroscopic approaches and ultrahigh-resolution mass spectrometry. Microplastics increased cumulative CO2 emissions by 160–613%, whereas CH4 emissions dropped by 45–503%, which may be attributed to the oxygenated porous habitats surrounding microplastics. Conventional and biodegradable microplastics changed the quantities of soil dissolved organic carbon. In the microplastic treatments, DOM with more polar groups was detected, suggesting a higher level of electron transport. In addition, there was a positive correlation between the carbon concentration, electron-donating ability, and CO2 emission. These findings suggest that microplastics may facilitate the mineralization of SOM by modifying O2 microenvironments, DOM concentration, and DOM electron transport capability. Accordingly, this study provides new insights into the impact of microplastics on soil carbon dynamics.
研究领域:
环境科学
·
土壤学
✓ 已验证
DOI
PubMed
高影响因子
CARBON
·
2024
·
IF 10.5
Jin-Ling Zhang,Zhan-Zhan Wang,Ting-Yu Yang,Sobhan Chatterjee,Mao-Sheng Cao,Hong-Shang Peng
Mineralization of CO 2 to minerals like calcium carbonate (CaCO 3 ) has been considered as an effective approach to combat global warming. In this paper, Ca 2+ ions were firstly extracted from waste carbide slag, and then facilely transformed to vaterite CaCO 3 via disperse bubbling carbonization method assisted with an air stone. By optimizing the reaction conditions, highly mono-dispersed vaterite CaCO 3 microspheres (VCMs) were obtained. These microspheres consisted of aggregated CaCO 3 nanocrystals , bearing a mesoporous structure. As a proof-of-concept, these mesoporous microspheres were utilized for dye adsorption and electromagnetic (EM) microwave absorption. For the former, the VCMs were used to adsorb Congo red, yielding a fast adsorption time of 9 min and a high adsorption capacity of 138.77 mg/g. For the latter, EM microwave dielectric parameters were measured, and dye-adsorbed VCMs exhibited better microwave-absorption performance with a minimum reflection loss of −43.2 dB, about 3 times of pristine vaterite. To the best of our knowledge, this is the first report of solid-waste-derived VCMs as microwave absorbent and dye adsorbent. Considering the low-cost, eco-friendly and facile preparation and effective utilization of VCMs, our work provides a promising strategy for large-scale carbon capture, solid waste utilization, and treatment of microwave and wastewater pollution.
研究领域:
材料科学
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环境科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yunpeng Wang,Tao Liu,Chun Cheng,Yachen Xie,Cheng Lan,Wenchuan Jiang,Zhiyu Zhao,Shuo Zhai,Yiri Li,Yifan Wu,Heping Xie
CO 2 batteries offer a promising avenue for mitigating CO 2 emissions and conversion, but encounter challenges such as high costs, dendrite, corrosion, flooding and slow kinetics stemming from the use of metal electrodes. CO 2 mineralization is thermodynamically favorable (ΔG CO2 ), presenting an opportunity for processing solid waste and reducing CO 2 emissions while potentially producing energy. However, the lack of direct electron transfer in the CO 2 mineralization reaction hinders the direct generation of electrical energy. Here, we propose an organic CO 2 mineralization battery (OCMB) without using metal, which efficiently harnesses CO 2 to mineralize solid waste carbide slag, maximizing the recovery of mineralization reaction energy to generate electricity and produce carbonate products, without requiring renewable electricity charging. We employ a high-solubility, stable under strong alkaline conditions, and fast kinetics organic phenazine derivative—DSPZ as the electron and proton carrier, which facilitates the conversion of ΔpH between electrodes by interacting with alkaline wastes and CO 2 into electricity. Simultaneously, the OCMB undergoes regeneration cycles through mineralization reactions. The theoretical model predicted the open circuit voltage (OCV) and discharge behavior of OCMB, offering insights for improved battery engineering. We demonstrate an impressive peak power density exceeding 227.5 W/m 2 for the OCMB, with an estimated electricity production of ∼ 178.03 kWh per ton of CO 2 mineralization. This research underscores the potential integration of OCMBs into CO 2 energy systems, waste treatment processes, and chemical production, offering both economic and environmental benefits.
研究领域:
能源化学
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环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2017
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IF 2.843
Peng Chen,Siyang Tang,Hairong Yue,Changjun Liu,Chun Li,Bin Liang
A new method coupling CO2 mineralization and solvent extraction was proposed and investigated to precipitate magnesium from high Mg/Li ratio brine. Organic amine was employed to extract HCl formed during the CO2 mineralization process and to realize continuous conversion of MgCl2 to precipitated MgCO3, thereby removing the magnesium contained in the brine. The effects of brine concentration, extractant, diluents, extractant concentration, phase ratio, and reaction temperature were systematically investigated. A blend of trioctylamine and isoamyl alcohol was used as the extractant and diluent, and the reaction parameters were optimized. The mechanism was proposed, and a stripping process was designed. Under the optimal conditions, the conversion of magnesium was as high as 67.41%, and the Mg/Li ratio of the raffinate decreased from 20 to 5.4.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Minerals Metallurgy and Materials
·
2024
·Vol. 31
·期 3
·562-573
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IF 5.6
Wang Qianqian,Yao Zequn,Guo Lijie,Shen Xiaodong
Water-quenched copper-nickel metallurgical slag enriched with olivine minerals exhibits promising potential for the production of CO 2 -mineralized cementitious materials. In this work, copper-nickel slag-based cementitious material (CNCM) was synthesized by using different chemical activation methods to enhance its hydration reactivity and CO 2 mineralization capacity. Different water curing ages and carbonation conditions were explored related to their carbonation and mechanical properties development. Meanwhile, thermogravimetry differential scanning calorimetry and X-ray diffraction methods were applied to evaluate the CO 2 adsorption amount and carbonation products of CNCM. Microstructure development of carbonated CNCM blocks was examined by backscattered electron imaging (BSE) with energy-dispersive X-ray spectrometry. Results showed that among the studied samples, the CNCM sample that was subjected to water curing for 3 d exhibited the highest CO 2 sequestration amount of 8.51wt% at 80°C and 72 h while presenting the compressive strength of 39.07 MPa. This result indicated that 1 t of this CNCM can sequester 85.1 kg of CO 2 and exhibit high compressive strength. Although the addition of citric acid did not improve strength development, it was beneficial to increase the CO 2 diffusion and adsorption amount under the same carbonation conditions from BSE results. This work provides guidance for synthesizing CO 2 -mineralized cementitious materials using large amounts of metallurgical slags containing olivine minerals.
研究领域:
材料科学
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环境科学
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矿物学
✓ 已验证
DOI
高影响因子
Biomass Conversion and Biorefinery
·
2025
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IF 4.1
Cao Shuangming,Sun Jianguo,Liu Qian,Gu Yonghua
Crab shells, as the waste from seafood processing, are emerging as a valuable resource for recycling and environmental protection. By combusting the organic components of crab shells, the high-calcium crab shell ash (CSA) is produced. This ash serves as a promising raw material for CO 2 mineralization, contributing to energy conservation and emission reduction. In this study, the systematic mineralization experiment of CSA was conducted using wet carbonation, focusing on the effects of reaction temperature, liquid–solid ratio, particle size, and stirring speed on CO 2 mineralization. The optimal mineralization conditions were achieved at a temperature of 60 °C, a liquid–solid ratio of 10 mL/g, a stirring speed of 700 rpm, and a CSA particle size exceeding 200 mesh, resulting in a carbonation efficiency of 66.10%. Furthermore, we improved the mineralization process by modifying the CSA with Na 2 CO 3 and employing microwave treatment. The carbonation efficiency significantly increased to 71.80% with a Na 2 CO 3 concentration of 1.75 mol/L. Notably, microwave drying further enhanced the carbonation efficiency of CSA to 73.01%. Our findings contribute to a deeper understanding of CSA mineralization and establish a theoretical foundation and research direction for enhancing the carbon sequestration capacity and subsequent application performance of crustacean biomass ash.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2019
·Vol. 9
·期 1
·1-9
·
IF 4.011
Li Chen,Wang Lijie,Yuan Min,Xu Hong,Dong Jinxiang
Here, we bridge the gap between carbon mineralization and laundry detergent builder with sodium oxalate. Daily laundry can help mineralize carbon dioxide. First, we screen an environment-friendly process to produce sodium oxalate, using CO 2 as a raw material. Then, we evaluate the properties of sodium oxalate as a detergent builder and prove the formation of calcium oxalate under laundry conditions. Our data suggest that sodium oxalate has excellent calcium-removing properties. Detergents based on sodium oxalate have good detergency. Furthermore, solid calcium oxalates (calcium oxalate monohydrate or calcium oxalate dihydrate, which has good stability in water and thermal stability), is obtained from washing waters. These results demonstrate the possibility of using sodium oxalate as detergent builder. The whole process can transform the greenhouse gas CO 2 into commodity chemicals and can mineralize carbon.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 24
·5930
·
IF 4.2
Liang Hao,Jingfei Luan
A highly versatile Z-scheme heterostructure, Ho2SmSbO7/YbDyBiNbO7(HYO), was synthesized using an ultrasonic-assisted solvent thermal method. The HYO heterojunction, composed of dual A2B2O7compounds, exhibits superior separation of photogenerated carriers due to its efficient Z-scheme mechanism. The synergistic properties of Ho2SmSbO7and YbDyBiNbO7, particularly the excellent visible light absorption, enable HYO to achieve exceptional photocatalytic performance in the degradation of fenitrothion (FNT). Specifically, HYO demonstrated an outstanding removal efficiency of 99.83% for FNT and a mineralization rate of 98.77% for total organic carbon (TOC) during the degradation process. Comparative analyses revealed that HYO significantly outperformed other photocatalysts, including Ho2SmSbO7, YbDyBiNbO7, and N-doped TiO2, achieving removal rates that were 1.10, 1.20, and 2.97 times higher for FNT, respectively. For TOC mineralization, HYO exhibited even greater enhancements, with rates 1.13, 1.26, and 3.37 times higher than those of the aforementioned catalysts. Additionally, the stability and durability of HYO were systematically evaluated, confirming its potential applicability in practical scenarios. Trapping experiments and electron paramagnetic resonance analyses were conducted to identify the active species generated by HYO, specifically hydroxyl radicals (•OH), superoxide anions (•O2−), and holes (h+). This facilitated a comprehensive understanding of the degradation mechanisms and pathways associated with FNT. In conclusion, this study represents a substantial contribution to the advancement of efficient Z-scheme heterostructure and offers critical insights for the development of sustainable remediation approaches aimed at mitigating FNT contamination.
研究领域:
材料科学
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环境科学
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光催化技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Zhongyi Xin,Le Guo,Shiyu Sui,Fengjuan Wang,Liguo Wang,Zhiyong Liu,Jinyang Jiang
Waste concrete, a bulk solid waste currently underutilized in industry, contains calcium resources that can be valorized via CO₂ mineralization. This study develops a scalable method to synthesize high-purity vaterite by extracting Ca²⁺ from hardened cement paste powder (HCPP) using 0.8 M NH 4 Cl for 60 minutes, followed by sodium dodecyl benzene sulfonate (SDBS)-mediated aqueous carbonation at 25°C with a CO₂ flow rate of 0.5 L/min. The factors affecting the leaching of Ca 2 + , and the content and types of calcium carbonate (CaCO 3 ) generated were investigated. Quantitative phase analysis via XRD Rietveld refinement confirmed 98.9 % vaterite purity under optimized conditions. Moreover, scanning electron microscope (SEM) analysis revealed the growth process of vaterite at varying temperatures. Specifically, at low carbonation temperature (25, 40°C), the initial formation was of shell-like vaterite, which transitioned into nano-vaterite and eventually developed into a dense internal structure. Conversely, at high carbonation temperature (60°C), leaf-like vaterite grew first and subsequently evolved into a flower-like structure.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
CONSTRUCTION AND BUILDING MATERIALS
·
2025
·
IF 8
Fubing Zou,Chenyang Wang,Deng Yan,Xingang Wang,Wenxiang Cao,Weichen Tian,Hongyun Luo,Jiukai Cai,Rui Li
Ion doping was regarded as an effective method for the adjustment of dicalcium silicate (C 2 S) mineral phase composition and then improve the corresponding carbonation activity according to recent studies. However, the main drawbacks of the previously reported about the carbonated compacts made by various ions-doped C 2 S were their low degree of carbonation (DOC). In this work, a typical heavy metal ion (i.e., Cr 6+ ) was used for the sintering of C 2 S, the effect of Cr 6+ doping on crystal transformation, mineral phase composition, carbonation hardening and solid solution tendency of clinkers was investigated. The results show that the moderate Cr 6+ doping (i.e., 1.5 %) led to an ultra-high DOC (i.e., around 59.2 %) and compressive strength (i.e., 137 MPa) of the corresponding carbonated compacts after 24 h. Comparing with blank group (i.e., without Cr 6+ ), the improvement degree of DOC and compressive strength was 27.4 % and 80.2 %, respectively. The reasons could be disclosed as following: comparing the single γ-C 2 S in blank group and excessive β-C 2 S with small amount of γ-C 2 S in Cr-2.0 % clinker, the moderate proportion of β-C 2 S and γ-C 2 S in Cr-1.5 % clinker, leading to their superior “transfer effect” (i.e., from the each other activation of β-C 2 S and γ-C 2 S). The superior “transfer effect” leading to their higher total carbonation activity and the combined CO 2 sequestration ability, which benefits the compressive strength and DOC in turn, respectively. This study provides new choice for preparing ultra-high CO 2 sequestration ability carbonate solidified materials based on ion-doped C 2 S clinker, and new insight on the reaction mechanism of binary C 2 S clinker.
研究领域:
材料科学
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硅酸盐化学
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碳捕集与封存
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环境功能材料
·
无机非金属材料
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）