ENVIRONMENTAL POLLUTION
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2023
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IF 8.9
Tao Huang,Lulu Zhou,Chun-Hai Yang,Shu-wen Zhang
The alkalinity of CaO is commonly insufficient in alkali-activating raw soils or minerals for the formation of cementation or geopolymerization. In this study, nonthermal plasma (NTP) irradiation was employed to activate traditional CaO to enhance its efficacy in alkali activation and further intensify the self-cementation of gold tailings. The solidification/stabilization (S/S) of the gold tailings-based matrix activated by NTP-CaO was better than that of CaO. The NTP irradiation enhanced the surface hydroxyl groups and oxygen atoms, decreased the binding energy, formed nanoparticles , and significantly changed the morphologies of the calcium activator. The dosage of the NTP-irradiated CaO (NTP-CaO) directly affected the self-cemented solidification/stabilization of gold tailings. The Johnson-Mehl-Avrami–Kolmogorov model was appropriate for analysing the NTP-CaO-activated geopolymerization kinetics of gold tailings. Three-dimensional (3D) structural minerals covered with small pores were determined in the NTP-CaO-activated cemented samples. The employment of NTP-CaO facilitated the formation of aluminosilicate geopolymers during the self-cementation of gold tailings according to comprehensive characterization strategies. The study achieves the efficient self-remediation of gold tailings by activating calcium precursors, which further solves the contradiction between salinization and alkali activation in the field of noncalcined cementitious materials.
研究领域:
材料科学
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环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Dongping Song,Tao Huang,Kai Chen,Jialin Cui,Qingyang Xu,Chengyu Yan,Chengzhe Yang,Shaohang Wan,Minfeng Tao
In this study, the magnesium phosphate cement (MPC) coupling with graphene nanosheets (GNP) was employed to solidify municipal solid waste incineration fly ashes (MSWI-FA) and stabilize the contaminants of heavy metals (HMs) and chloride salts in the matrix. The maximum compressive strength of 45.62 MPa and the minimum leaching concentration of 0.012, 0.0064, 0.00079, 0.0045, and 0.048 mg/L for Zn, Cu, Cd, Pb, and total Cr and 0.86 g/L for chloride were obtained from the GNP-MPC-MSWI-FA-cemented matrix in the orthogonal tests and toxicity-leaching experiments, respectively. MSWI-FA significantly changed the MPC hydration process. The influence of MPC on the speciation transformation of HMs was more prominent than that of GNP. Fick's theory model was appropriate in fitting the whole leaching process of HMs and dissolvable chloride species from the matrix under acid-immersion conditions. Both K-struvite and Phase-5 were formed in the matrix in mineral analysis, verifying the formation of both MPC and magnesium oxychloride cement (MOC). The chloride salts in the MSWI-FA facilitated the self-cementation of MOC from light-burnt magnesia in MPC. The mechanisms including the formation of phosphate precipitation, gelation encapsulation, and chemical hydration brought by MPC attributed to effective solidification/stabilization of HMs and chloride in the MSWI-FA.
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2025
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IF 19
Liping Zhang,Zhangrui Wu,Xiansheng Zhao,Geng Wang,Quyang Yang,Minxia zhang,Xiaowei Wang,Xiujun Cheng,Changyue Wu,Dan Wu,Yutian Yang,Canbin Dong,Tao Zhang,Weiqiang Tan,Ningwen Zhu
Military-related burn wounds present unique clinical challenges, including high infection risk, austere treatment environments, and the need for rapid hemostasis. In this study, the study develops a multifunctional PG@PAC powder hydrogel dressing composed of incorporating phenylboronic acid-modified oxidized dextran (POD), carbonic dihydrazide-modified gelatin (Gel-CDH), and the self-assembly nanoparticles of proanthocyanidins (PA) and chlorhexidine acetate (CHX). Upon contact with wound exudates, the powder rapidly self-assembled into a robust hydrogel via dynamic Schiff-base reactions, exhibiting strong tissue adhesion, self-healing ability, and mechanical properties comparable to natural skin. The PG@PAC (POD/Gel-CDH@PA/CHX) hydrogel possesses broad-spectrum antibacterial effects, powerful reactive oxygen species-scavenging activity, and excellent biocompatibility. It also facilitates macrophage polarization to the M2 phenotype, which lead to the decrease of pro-inflammatory cytokines and the increase of anti-inflammatory cytokines. In a murine model with S. aureus -infected burn wounds, PG@PAC treatment improves wound microenvironment, resulting in accelerated wound healing, augmented collagen deposition, decreased bacterial burden, and facilitated angiogenesis. These results indicate that PG@PAC is a potential all-in-one ready-to-use dressing for infected burn wound under resource-limited environments and provide a promising envision of battlefield wound management.
研究领域:
生物医学工程
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伤口护理
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军事医学
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生物材料
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传染病
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再生医学
✓ 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）