APPLIED CLAY SCIENCE
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2024
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IF 5.3
Fulong Cheng,Jie Pan,Changxin Zhao,Wei Li,Yuting Peng,Zuo Zhang,Yanjuan Lin,Guowen Chen
Pure hydrotalcite (LDH) materials prepared from chemical reagents have been investigated as solid-phase phosphorus (P) inactivation materials (SPIM) to manage endogenous P loading in sediments. However, the efficacy and mechanism of LDH mixtures prepared by natural minerals and solid wastes in controlling sediment P release are unclear. Therefore, a Ca/Mg-Al-LDH (CMA-LDH) material was synthesized using sepiolite and cans, and its efficacy, mechanism, and ecological impact in controlling sediment P release were investigated. CMA-LDH-p was prepared as a control material using pure chemical reagents. The CMA-LDH and CMA-LDH-p were both composed of hydrotalcite and hydrocalumite. The maximum P adsorption capacity of CMA-LDH was 123.01 mg/g, comparable to that of CMA-LDH-p. The adsorbed P by CMA-LDH was mostly in the stable P form, accounting for 87.2 % of the total P. The adsorption capacity and immobilization ability of CMA-LDH for P were superior to other reported LDH-based SPIM. Both the CMA-LDH addition and capping successfully blocked sediment P release under anaerobic conditions. Passivation of mobile P in the sediment and DGT-labile P in the interstitial water was critical to preventing sediment P release by the CMA-LDH addition. The CMA-LDH capping inhibited sediment P release through the effective adsorption of CMA-LDH on DGT-labile P at the sediment/overlying water interface. The CMA-LDH addition and capping affected the abundance of microbial communities associated with iron and sulfur cycling, which might affect the stability of endogenous P. These results confirmed that CMA-LDH addition and capping treatments were effective methods for managing sediment P loading.
研究领域:
环境科学
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生态学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2022
·Vol. 29
·期 25
·38006-38016
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IF 5.19
Wang Luyao,Wang Hanlin,Liu Haibo,Zou Xuehua,Chen Dong,Chu Ziyang,Hu Jinchao,Chen Tianhu
Naturally occurring Mn-rich limonite mainly composed of goethite and manganese oxides was used to remove tetracycline (TC) from the aqueous solution. The effects of dosage, initial solution pH, temperature, and coexisting anions on TC removal were investigated. Results showed that 95% of TC (30.0 mg·L −1 ) was removed in a wide pH range of 3.0–9.0 by limonite with high specific surface area (145.0 m 2 ·g −1 ) and mesoporous structure. The presence of Cl − , NO 3 − , and SO 4 2− in the studied concentration range did not influence TC removal efficiency significantly, while PO 4 3− inhibited the adsorption of TC over limonite due to the competition with TC for active sites. Integrated with the FT-IR analysis, electrostatic interaction and complexation were proved to be the adsorption mechanisms of TC by limonite. The quenching experiments and ESR analysis revealed that singlet oxygen ( 1 O 2 ) also was involved in TC degradation. In addition, limonite displayed an efficient recycling performance and stability after four cycles. This study revealed that the Mn-rich limonite was a promising adsorbent for TC removal from aqueous solutions and promoted the application of natural mineral material in the environmental field.
研究领域:
环境科学
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化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CLAY SCIENCE
·
2020
·
IF 4.605
Zhiya Sun,Mei Long,Xinxuan Liu,Yi Zhang,Shunxiang Li,Limei Bai,Huaming Yang
Ulcerative colitis (UC) affects millions of people worldwide and is currently incurable. As such, there is an urgent need for effective drugs that will promote UC remission. This study investigated the therapeutic effects of five typical natural minerals on UC induced by dextran sulfate sodium (DSS): kaolinite (Kaol), halloysite (Hal), diatomite (Dia), montmorillonite (Mt), and palygorskite (Pal). These minerals were characterized by lamellar, tubular, columnar porous, and fibrous morphologies, as well as centered size distribution and negative charge. In vivo experiments indicated that natural minerals had a remission effect on UC and altered gut flora, especially Kaol. These results suggest that natural minerals can serve as drugs, or drug carriers, to attain synergistic effects with other drugs for UC therapy.
研究领域:
医学
·
药理学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2022
·
IF 4.432
Bohao Cheng,Yifan Wang,Xiaowen Wu,Minghao Fang,Xin Min,Zhaohui Huang,Yan'gai Liu,Ruiyu Mi
In this study, the electrospun polyacrylonitrile (ePAN) fiber mats were used as support layer and natural mineral-halloysite nanotubes (HNTs) was used to construct the interlayer. Polydopamine modification was utilized to enhance the hydrophilicity of ePAN substrates and dispersibility of HNTs. The mHNTs interlayer effectively minified the surface pore size of substrates providing a better interface for interfacial polymerization forming an integrated and thin PA selective layers. Compared to the unmodified membranes, the water flux of the optimized membrane with mHNTs interlayer about 61.60% and 79.70% higher and the reverse salt flux of which was 38.95% and 45.08% lower in AL-FS mode and AL-DS mode respectively. These results suggested that introducing halloysite nanotube interlayer is an effective, and low-cost way to fabricate high-performance FO membrane .
研究领域:
材料科学
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环境工程
✓ 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）