Russian Journal of Physical Chemistry A
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2024
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IF 0.7
Ding Yan,Guo Chuwen,Li Debo,Lv Maochao,Zhang Xiaowei,Gai Didi,Fu Binbin,Yang Shuairong,Zhao Peitao
Abstract This study aims to investigate the evolution law of the material properties of rice husk (RH) hydrochar under quantitative process water recycling (QPWR) and to evaluate the changes in the adsorption performance of biomass hydrochar to malachite green (MG) with QPWR. In this study, 6 groups of RH samples were subjected to hydrothermal carbonization (HTC) experiments at 220°C, respectively. Except for the first HTC, which did not contain QPWR, the subsequent 5 HTC experiments all included the 100 mL process water from the previous HTC. The results demonstrated that after using QPWR, the mass yield (MY) of hydrochar increased from 68.51% without QPWR to 75.51% in the third QPWR; The carbon content increased from 58.09% of no QPWR to 76.63% of the fifth QPWR. Meanwhile, the volatile content decreased slowly from 42.70% without QPWR to 39.75% under the fifth QPWR, while the ash content increased slightly from 20.94% without QPWR to 21.45% under the fifth QPWR. SEM analysis showed that QPWR was beneficial to the decomposition and degradation of RH in HTC and promoted the accumulation of intermediates on the surface of hydrochar. BET-specific surface area and pore volume determination confirmed that QPWR could increase slightly the specific surface area and pore volume of hydrochar. Besides, the hydrochar produced by each HTC was used to adsorb malachite green, respectively. The results showed that the QPWR enhanced the adsorption performance of hydrochar, and the Langmuir–Freundlich adsorption model was more suitable to fit the adsorption law. These results highlighted the potential of QPWR in improving the application of biomass hydrochar.
研究领域:
环境科学
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生物质能
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材料科学
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DOI
高影响因子
Nature Communications
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2024
·Vol. 15
·期 1
·1-9
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IF 14.7
Zhang Shun,Xu Wenhao,Du Rongcheng,Yan Lei,Liu Xuehui,Xu Shimei,Wang Yu-Zhong
Recycling strategies for mixed plastics and textile blends currently aim for recycling only one of the components. Here, we demonstrate a water coupling strategy to co-hydrolyze polyester/cotton textile blends into polymer monomers and platform chemicals in gamma-valerolactone. The blends display a proclivity for achieving an augmented 5-hydroxymethylfurfural yield relative to the degradation of cotton alone. Controlled experiments and preliminary mechanistic studies underscore that the primary driver behind this heightened conversion rate lies in the internal water circulation. The swelling and dissolving effect of gamma-valerolactone on polyester enables a fast hydrolysis of polyester at much lower concentration of acid than the one in the traditional hydrolysis methods, effectively mitigating the excessive degradation of cotton-derived product and undesirable product formation. In addition, the system is also applicable to different kinds of blends and PET mixed plastics. This strategy develops an attractive path for managing end-of-life textiles in a sustainable and efficient way.
研究领域:
材料科学
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化学工程
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可持续性
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纺织工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2021
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IF 5.909
Yulong Yang,Zhanghua Liu,Huiming Zheng,Shicui Zhu,Kejia Zhang,Xueyan Li,Xiaoyan Ma,Andrea M. Dietrich
As a globally important artificial sweetener, sucralose (SUC) is a persistent emerging contaminant in global aquatic environments. This research comprehensively track the fate and transport of SUC throughout an urban water cycle; to perform laboratory experiments to determine chlorinated disinfection by-products (DBPs) of SUC sebsequent to advanced oxidation with ozone; and to perform a risk evaluation of SUC related DBPs.; The results demonstrated that SUC was consistently present throughout the urban water cycle, including consumer's tap water . The inluent to the municipal wastewater treatment plant contained 1033.4-2626.3 ng/L SUC, and as expected for this non-biodegradable artificial sweetener, the concentration in the effluent was slightly reduced to 917.6-2031.2 ng/L. The concentration of SUC varied in surface waters with a peak value of 2070.0 ng/L. In finished drinking water 288.1–505.3 ng/L SUC was found, and values of 177.7–409.7 ng/L were present in the distribution system. Up to 16.3% of SUC concentration discharged as municipal wastewater was delivered to residents in their drinking water . While conventional treatment little removed SUC, the mean removal efficiency of SUC with ozonation followed by activated carbon filtration was 39.6% at a full-scale drinking water treatment plant. The fate and transformation of SUC in drinking water treated by ozonation and chlorination were investigated in laboratory experiments. Ozonation partially degraded SUC; however, intermediates reacted with chlorine to generate DBPs, including trichloromethane (TCM), dichloroacetic acid (DCAA) and trichloroacetic acid (TCAA). Peak 7-days potential formation of TCM, DCAA and TCAA were 0.016, 0.51 and 23.34 μ g/mg SUC, respectively. DBP yields increased with increasing chlorine dosage, chlorination time, temperature, and solution pH. The presence of ammonia nitrogen in water facilitated dichloroacetonitrile (DCAN) production up to 0.78 μ g/mg SUC, while simultaneously reducing the yield of TCM, DCAA and TCAA. Human exposure analysis revealed that carcinogenic risks of DBPs caused only by SUC ozonation were in the range of 1.86 × 10 −12 -6.12 × 10 −9 , while non-carcinogenic risks were in the range of 6.0 × 10 −9 -4.37 × 10 −6 . The pervasive occurrence of SUC in an urban water cycle, couple to its resistance to biological and chemical treatment, confirms that SUC is a persistent contaminant in the aquatic system, including tap water .
研究领域:
环境科学
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公共卫生
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化学工程
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Yuan Gao,Qimeng Sun,Yang Chen,Xinghai Zhou,Chunyan Wei,Lihua Lyu
Solar-driven evaporators offer a promising approach to obtaining fresh water due to their environmental protection and pollution-free operation, and because they require no other energy input. In this work, we prepared a low-cost fabric roll-based bionic evaporator (FRBE) with advanced heat management and salt pollution resistance based on a three-dimensional (3D) spiral groove structure design for the solar evaporation of seawater. The spiral groove structure, inspired by the vertical water supply of natural trees, had a super-strong regional water circulation ability between the yarns and fibers. The heat energy of the photothermal surface was quickly transmitted to the cold evaporation surface to realize rapid water evaporation, and the low evaporation surface temperature effectively reversed the usual heat loss phenomenon. Under 1.0 sun irradiation, the evaporation rate and evaporation efficiency of the prepared FRBE-4–2 reached 2.89 kg·m −2 ·h −1 and 130.04 %, respectively. In the evaporation tests with 10 wt% and 20 wt% NaCl solutions, the regional water circulation effectively promoted the dissolution and diffusion of salt on the evaporation surface, reflecting excellent salt pollution resistance performance. Therefore, the 3D spiral evaporation surface design developed in this study provided a new idea for efficient and sustainable steam generation.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Nature Communications
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2024
·Vol. 15
·期 1
·1-9
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IF 14.7
Yuan Renxuan,Li Huizeng,Zhao Zhipeng,Li An,Xue Luanluan,Li Kaixuan,Deng Xiao,Yu Xinye,Li Rujun,Liu Quan,Song Yanlin
Numerous efforts have been devoted to harvesting sustainable energy from environment. Among the promising renewable resources, ambient heat exhibits attractive prospects due to its ubiquity and inexhaustibility, and has been converted into electricity through water evaporation-induced hydrovoltaic approaches. However, current hydrovoltaic approaches function only in low-humidity environments and continuously consume water. Herein, we fabricate a hermetic hydrovoltaic cell (HHC) to harvest ambient heat, and have fully addressed the limitations posed by environmental conditions. Meanwhile, for the first time we develop an internal circulation hydrovoltaic mechanism. Taking advantage of the heterogeneous wicking bilayer structure, we verify that inside the hermetic cell, the ambient temperature fluctuation-induced evaporation and further the water circulation can persist, which sustains the hydrovoltaic effect to convert ambient heat into electricity. More importantly, the hermetic design enables the cell to work continuously and reliably for 160 h with negligible water consumption, unaffected by external influences such as wind and light, making it an excellent candidate for extreme situations such as water-scarce deserts, highly humid tropical rain forests, rainy days, and dark underground engineering. These findings provide an easily accessible and widely applicable route for stably harnessing renewable energy, and more notably, offer a novel paradigm toward leveraging low-grade ambient heat energy via circulation design.
研究领域:
材料科学
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能源工程
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环境科学
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Zhihong Yin,Shuangxi Li,Dan Hu,Zhuo Li,Ruoyu Chu,Chenchen Liu,Xinzhu Li,Jiangjun Hu,Liandong Zhu
As an environmentally friendly bioflocculant, chitosan has a great application potential in the field of microalgae harvesting due to its biocompatibility. In this work, three different inorganic clay minerals (kaolin, montmorillonite, and diatomite) were selected to prepare chitosan-clay composite materials (CTS/KAL, CTS/MML and CTS/DTE) as flocculants to harvest microalgae cells. The harvesting capacities of CTS/KAL, CTS/MML and CTS/DTE were accordingly 97.37%, 97.81% and 98.34% for microalgae cells under the dosage of 60 mg/L, microalgae concentration of 0.923 g/L, settling time of 30 min and pH of 10. CTS/DTE showed excellent harvesting performance for microalgae cells, mainly due to the enhancement of charge neutralization, sweeping and bridging effects. Based on the phenomenological theory, the second-order polynomial model was used to analyze the influences of different external factors on the microalgae harvesting efficiency. A reasonable performance relationship between CTS-clays for harvesting of microalgae cells and external factors was established. The analysis of carbohydrates, proteins, and fatty acids of microalgae biomass collected by CTS/KAL, CTS/MML, CTS/DTE and centrifugation showed that the harvesting of CTS-clay did not influence the properties of biomass. The experimental results of water resource recycling and re-cultivation after microalgae harvesting by CTS/KAL, CTS/MML and CTS/DTE exhibited that the growth rates of 50% circulating medium + 50% fresh BG11 culture medium were accordingly 2.512, 2.466 and 2.572 times higher than those of 100% circulating medium. It is concluded that chitosan-clay composite materials are efficient and environmentally friendly flocculants with a great applicable potential in microalgae harvesting.
研究领域:
环境科学
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生物技术
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产品关联
DOI
高影响因子
Science Advances
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2024
·Vol. 10
·期 2
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IF 11.7
Yunhao Hu,Weifeng Yang,Wei Wei,Zhouquan Sun,Bo Wu,Kerui Li,Yaogang Li,Qinghong Zhang,Ru Xiao,Chengyi Hou,Hongzhi Wang
Collecting energy from the ubiquitous water cycle has emerged as a promising technology for power generation. Here, we have developed a sustainable moisture absorption-evaporation cycling fabric (Mac-fabric). On the basis of the cycling unidirectional moisture conduction in the fabric and charge separation induced by the negative charge channel, sustainable constant voltage power generation can be achieved. A single Mac-fabric can achieve a high power output of 0.144 W/m2 (5.76 × 102 W/m3) at 40% relative humidity (RH) and 20°C. By assembling 500 series and 300 parallel units of Mac-fabrics, a large-scale demo achieves 350 V of series voltage and 33.76 mA of parallel current at 25% RH and 20°C. Thousands of Mac-fabric units are sewn into a tent to directly power commercial electronic products such as mobile phones in outdoor environments. The lightweight (300 g/m2) and soft characteristics of the Mac-fabric make it ideal for large-area integration and energy collection in real circumstances.
研究领域:
材料科学
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能源技术
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产品关联
DOI
PubMed
高影响因子
ACS ES&T Engineering
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2025
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IF 6.7
Xiaoyu Teng,Peng Zhang,Songhu Yuan
Air sparging (AS) normally removes volatile chlorinated solvents in aquifers by stripping. Here, we found that oxygen (O2) supplied by AS could be transformed to hydroxyl radicals (•OH) by aquifer Fe(II) and led to a significant degradation of contaminants. In a simulated two-dimensional (2D) sand-filling aquifer contaminated with 22 μM trichloroethylene (TCE), long-term groundwater circulation subsequent to short-term AS was applied to facilitate the dissolving and mass transport of O2, and dissolved Fe(II) in the form of TPP–Fe(II) complex was added as the source of Fe(II). With the addition of 1.6 mM TPP–Fe(II), TCE removal increased from 52.9 to 89.0% with the increase in air flow rate from 20 to 120 L/h, and degradation contributed to over 89% of the total removals. TCE degradation also increased significantly with the increase in TPP–Fe(II) concentration. Degradation played a much more significant role than stripping for TCE removal in the sequential process. Temporal and spatial distributions of dissolved O2, dissolved Fe(II), and TCE corroborated the predominant contribution of the O2–Fe(II) interaction for TCE degradation due to •OH production. This study demonstrates the important role of oxidation in air sparging and provides a new strategy for applying O2–Fe(II)-driven oxidation by O2 in aquifer treatment.
研究领域:
环境工程
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化学工程
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水文地质学
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环境化学
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
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2025
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IF 3.9
Xu Yongjian,Wei Xudong,Deng Wenhuan,Chen Hao
To address the challenge of irreversible aggregation of nanocrystalline cellulose (CNC) after dehydration and to prepare high-concentration redispersible CNC pastes, this study presents an eco-friendly strategy employing maltodextrin (MD) and sodium polyacrylate (PAAS) as synergistic dispersants. MD functions as a “hydrogen bonding inhibitor” whereas PAAS effectively stabilizes CNC suspensions through electrostatic repulsion. Redispersible CNC pastes with varying dehydration levels were successfully prepared via vacuum-assisted concentration. Systematic evaluations of MD/PAAS impacts on Re-CNC colloidal behavior—including the hydrodynamic diameter, particle size distribution, and surface charge (zeta potential) unveiled the identification of four optimal redispersion pathways. Crucially, the concentration-dehydration-rehydration cycle preserved CNC’s intrinsic properties under optimized conditions. Transmission electron microscopy (TEM) analysis confirmed the morphological integrity of CNC, while Fourier-transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD) profiles confirmed retention of chemical functionalities and crystalline structures. The engineered pastes exhibited prolonged dispersion stability (> 30 days without sedimentation). Thermal gravimetric analysis further revealed that MD-stabilized Re-CNC maintained thermal decomposition resistance equivalent to native CNC, with PAAS integration substantially elevating thermal endurance by 18–22%. Ultimately, using redispersed cellulose nanocrystals (Re-CNC) and sodium alginate (SA) as the matrix and curcumin (Cur) as the model drug, a double-network hydrogel, Cur@Re-CNC/SA, was constructed through cross-linking with calcium gluconate. Its drug release performance was comparable to that of Cur@CNC/SA prepared from pristine CNC, verifying the feasibility of the redispersion strategy. Graphical abstract
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DOI
高影响因子
危险品化学品经营许可证（带存储）