JOURNAL OF HAZARDOUS MATERIALS
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2025
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IF 11.3
Haowen Zhang,Mengjie Pu,Ming Zheng,Bentuo Xu,Jason T. Magnuson,Qiqing Chen,Xiangrong Xu,Xiangyong Zheng,Min Zhao,Wenhui Qiu
Microplastics (MPs) are gaining attention for their widespread presence and toxicity in ecosystems. However, their role as a carbon source in urban wetland carbon sinks is still unclear. In this study, the microplastic-carbon (MP-C) was firstly quantified based on the abundance and occurrence characteristics, including MP morphology, size and type in the Sanyang Wetland, a typical urban wetland of China. MP abundances ranged from 2.4 ± 0.6–14.9 ± 1.5 items/L in surface water and 6.6 ± 1.2 × 10 3 to 46.3 ± 5.9 × 10 3 items/kg in sediment. The predominant morphological characterization of MPs was fragments smaller than 200 μm in size, consisting of PP, PE, and PET, which suggests that the main source was domestic wastewater discharge nearby. Notably, in the Sanyang wetland, the contribution of MP-C to total organic carbon (TOC) was estimated to be 0.023 0.20 % in water and 0.026 0.28 % in sediment. With the continuous production of plastics globally, these values were predicted to increase to 0.12 0.71 % and 0.83 4.12 % by 2100, respectively. Although the estimations relied on simplified geometric assumptions for MP volume and theoretical carbon content, these approaches provide a reasonable basis for understanding MP-C dynamics in wetlands under current analytical constraints. The integration of MP-C characterization during environmental monitoring and management strategies would enhance our understanding of MP pollution's role in the carbon cycle.
研究领域:
环境科学
·
生态学
✓ 已验证
DOI
PubMed
高影响因子
Journal of CO2 Utilization
·
2021
·
IF 7.132
Liang Ma,Long Zhao,Yun Li,Jianbin Zhang
The controllable synthesis of pure vaterite with the good properties and broad application prospects is considered as an important, yet a challenging task because the product properties are greatly affected by reaction conditions. In the present work, the controllable synthesis of pure vaterite crystals was explored with four different Ca 2+ sources including CaCl 2 , Ca(NO 3 ) 2 , CaBr 2 and Ca(Ac) 2 using an CO 2 -storage material (CO 2 SM) prepared by an indirect CO 2 utilization approach as the CO 3 2− source. The effects of five major reaction conditions including reaction medium, hydrothermal reaction temperature, hydrothermal reaction time, Ca 2+ concentration and sources, and pH and conductivity on the crystallization of CaCO 3 were systemically investigated. It is found that the amounts of CO 2 SM required for the formation of pure vaterite phase are in the order of CaBr 2 (20 g/L CO 2 SM) > Ca(NO 3 ) 2 (16 g/L CO 2 SM) > Ca(Ac) 2 (8 g/L CO 2 SM) due to the effects of ethylenediamine (EDA), diethylene glycol (DEG) and their anions. Especially, vaterite was not found in CaCl 2 system. The effects of Ca 2+ sources on the crystal phase composition of CaCO 3 are revealed for the controllable synthesis of CaCO 3 crystals. Our work not only provides a controllable synthesis method of pure vaterite, but also an indirect CO 2 utilization strategy.
研究领域:
化学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2025
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IF 5.2
Xingbo Li,Liangyue Jiang,Zhe Zhang,Shengyang Tao,Yongchen Song
Carbon dioxide hydrate is an efficient technology for carbon dioxide capture and storage, and its growth is a complex process involving multiple phases and components. Typically, the nucleation and growth of hydrates require the introduction of surfactants to improve interfacial compatibility. In this study, we designed and synthesized two new surfactants (QC 12 PyBr and QAC 12 Et 3 Br), both deploying fluorescent group (quinoline) for the hydrophobic end. To enhance the weak interaction with H 2 O molecules, pyridine and triethylamine are introduced as the hydrophilic end with QC 12 PyBr and QAC 12 Et 3 Br respectively. This design endowed the surfactants with optical activity (UV illumination) while maintaining their original amphiphilic properties. The effects on hydrate growth are explored by molecular dynamics simulations, which provide molecular scale insights into CO 2 hydrate growth regulated by surfactant from the perspectives of CO 2 aggregation morphology, surfactant conformation, as well as weak intermolecular interactions, respectively. The results indicate that the spherical morphology with higher interface curvature of CO 2 aggregation is more favorable for hydrate growth. DFT calculations show that the differences in intermolecular interactions between hydrophilic groups and H 2 O molecular lead to different surfactant spatial conformations at the gas–liquid interface. Additionally, a combination of simulation and experimental methods is employed to further verify the feasibility of the surfactants designed in this study, thus confirming that the synthesized surfactant possesses the ability to effectively regulate hydrate growth for CO 2 storage while providing a new method for monitoring hydrate film growth based on the fluorescence activity.
研究领域:
化学工程
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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
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Xingyu Lin,Hongsheng Lu,Ruoxin Zhang,Ziteng Yang,Yingjiang Chen,Baiwen Huang
CO 2 flooding offers dual benefits by enhancing oil recovery and facilitating CO 2 storage. However, reservoir heterogeneity and clay swelling can significantly limit CO 2 storage capacity. Here, a novel strategy for in-situ formation of particle profile control agent and clay swelling inhibitor was established by CO 2 -responsive ionic liquids (ILs). Two fatty acid (FA)-based ILs were synthesized by reacting N, N -dimethylcyclohexylamine (DMCHA) with myristic acid (C14) and palmitic acid (C16). After CO 2 injection, FA was precipitated again as a particle profile control agent with a particle size exceeding 10.65 μm, while the protonated DMCHA in the remaining liquid phase serves as a clay swelling inhibitor. Notably, the precipitation of FA within the core increases the CO 2 storage capacity by 1.96 times. This innovative approach holds great promise for enhancing the efficiency and sustainability of CO 2 injection, benefiting both the petroleum industry and environmental protection.
研究领域:
石油工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
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2012
·Vol. 4
·期 4
·1126-1131
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IF 5.321
Yali Luo,Shoucun Zhang,Yunxiang Ma,Wei Wang,Bien Tan
Two hypercross-linked polymer networks have been synthesized by the self-condensation of bishydroxymethyl monomer, 1,4-benzenedimethanol (BDM), and monohydroxymethyl compound, benzyl alcohol (BA). This is different from the previous reports where multifunctional monomers or cross-linkers are crucial for constructing the porous polymer networks. N2 sorption isotherms for the polymers show that both materials are predominantly microporous with Brunauer–Emmett–Teller (BET) surface areas of 847 m2 g−1 for HCP–BDM and 742 m2 g−1 for HCP–BA. A network based on BA can also store a significant amount of CO2 (8.46 wt%) and H2 (0.97 wt%) at 1.0 bar, and at 273 K and 77 K respectively, despite its relatively modest surface area. Based on these results, this study opens up the possibility of synthesizing porous materials using monofunctional monomers.
研究领域:
材料科学
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化学工程
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聚合物化学
✓ 已验证
产品关联
DOI
高影响因子
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