ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
·
2024
·Vol. 31
·期 39
·52582-52595
·
IF 0
Zhou Hao,Dang Yan,Chen Xinyu,Ivanets Andrei,Ratko Alexander A.,Kouznetsova Tatyana,Liu Yongqi,Yang Bo,Zhang Xulong,Sun Yiwei,He Xiaoyan,Ren Yanjie,Su Xintai
Due to industrialization, soil heavy metal pollution is a growing concern, with humic substances (HS) playing a pivotal role in soil passivation. To address the long duration of the compost humification problem, coal fly ash (CFA) in situ catalyzes the rapid pyrolysis of the cotton stalk (CS) to produce HS to address Cd passivation. Results indicate that the highest yield of humic acid (HA) (8.42%) and fulvic acid (FA) (1.36%) is obtained when the CS to CFA mass ratio is 1:0.5, at 275 ℃ for 120 min. Further study reveals that CFA catalysis CS humification, through the creation of alkaline pyrolysis conditions, Fe 2 O 3 can stimulate the protein and the decomposition of hemicellulose in CS, and then, through the Maillard and Sugar-amine condensation reaction synthesis HA and FA. Applying HS-CS&CFA in Cd-contaminated soil demonstrates a 26.69% reduction in exchangeable Cd within 30 days by chemical complexation. Excellent maize growth effects and environmental benefits of HS products are the prerequisites for subsequent engineering applications. Similar industrial solid wastes, such as steel slag and red mud, rich in Fe 2 O 3 , can be explored to identify their catalytic humification effect. It could provide a novel and effective way for industrial solid wastes to be recycled for biomass humification and widely applied in remediating Cd-contaminated agricultural soil.
研究领域:
环境科学
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土壤修复
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产品关联
DOI
PubMed
Scientific Reports
·
2020
·Vol. 10
·期 1
·1-14
·
IF 3.998
Zhang Junwei,Chen Yan,Nie Zeguang,Chen Zhengshou,Gao Junkai
In this study, silver microspheres (SMS) were introduced into cotton stalk porous-carbon (CSP) to prepare silver microsphere doping porous-carbon (SMS-CSP), and then SMS-CSP was used as the matrix of polyethylene glycol (PEG) to synthesize shape-stable phase change material of PEG/SMS-CSP. It was found that the introduction of SMS into CSP could not only greatly improve the loading capacity of the porous-carbon for PEG, but also could increase the thermal conductivity of PEG/SMS-CSP. Additionally, the method of introducing SMS into porous-carbon had the advantages of environmental protection and simple operation. Moreover, the raw material of cotton stalk is a kind of agricultural waste, which has the merits of wide source, low price and easy to obtain. Furthermore, in the preparation of cotton stalk porous-carbon, with the increase of pyrolysis temperature the thermal conductivity of PEG/SMS-CSP could be enhanced significantly. The mechanism about the enhancement of thermal conductivity was clarified, which could provide more basic theory for the study about the thermal conductivity of shape-stable phase change materials (ss-PCMs) based on porous-carbon.
研究领域:
材料科学
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能源工程
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产品关联
DOI
PubMed
高影响因子
DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Tianyi Cui,Yuan Zhang,Mingxia Tian,Yumin Yan,Guyu Zhang,Tao Zhang,Jianbo Zhao,Jianhui Jiang
In this study, agricultural waste cotton stalk was used as biomass carbon source, calcined with TiO 2 at a high temperature, deposited in a TiO 2 lattice, and used as an electron acceptor to inhibit photogenerated electron recombination. Subsequently, it underwent secondary calcination with g-C 3 N 4 to form a C-TiO 2 /g-C 3 N 4 composite catalyst. Experimental results showed that the coupling of carbon-doped TiO 2 and g-C 3 N 4 accelerated photogenerated electron–hole pairs pair migration, effectively inhibited the recombination of photogenerated carriers, and thus improved the removal efficiency of methylene blue (MB) and tetracycline hydrochloride (TC). Upon irradiation with a 500 W xenon lamp, the degradation rates of MB and TC achieved were 92.6 % and 95.3 % in 90 min, respectively.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Polymers
·
2022
·Vol. 14
·期 20
·4307
·
IF 4.967
Xiao Yang,Naihao Chen,Shengbo Ge,Yequan Sheng,Kun Yang,Pengmusen Lin,Xuqiang Guo,Su Shiung Lam,Hui Ming,Libo Zhang
The conversion of agricultural and forestry waste biomass materials into bio-oil by mild hydro-thermal technology has a positive effect on extending the agricultural industry chain and alleviating the world energy crisis. The interaction investigation of biomass components during bio-oil formation can be significant for the efficient conversion of lignocellulose when different raw materials are fed together. In this paper, a bio-oil pyrolysis behavior (thermogravimetric analysis, TG) perspective component interaction investigation of cotton stalks under low-temperature hydro-thermal conversion (220 °C) was studied. Cellulose, hemi-cellulose, lignin, and protein were used as lignocellulose model components, by their simple binary blending and multi-variate blending and combined with thermo-gravimetric analysis and gas chromatography-mass spectrometry (GC-MS) characterization and analysis. The interaction of different model components and real biomass raw material components in the hydro-thermal process was explored. Results showed that the components of hydro-thermal bio-oil from cotton stalks were highly correlated with the interactions between cellulose, hemi-cellulose, lignin, and protein. During the hydro-thermal process, cellulose and hemi-cellulose inhibit each other, which reduces the content of ketones, aldehydes, ethers, and alcohols in bio-oil. Interaction between cellulose and lignin was obvious, which promotes the formation of oligomers, such as ketones, aldehydes, esters, phenols, and aliphatic, while inhibiting the production of aromatic and multi-hybrid compounds. Otherwise, there was no obvious interaction effect between hemi-cellulose and lignin or between lignin and protein. This research will guide the industrialization of lignocellulose, especially the possible co-feed hydro-thermal conversion technology.Keywords:bio-oil;cotton stalk;hydro-thermal liquefaction;interaction;multi-variate blending
研究领域:
生物能源
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热化学转化
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生物质工程
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产品关联
DOI
PubMed
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2024
·
IF 4.5
Zheng Zhang,Chengbo Zhang,Gang Liu,Daning Lang,Lu Wang,Chao Yang,Jihong Fu,Ronglan Wu,Wei Wang
Selective adsorbent materials for the remediation of printing and dyeing wastewater were successfully prepared from cotton stalks by sodium chlorite pretreatment and vinylamine modification. Its dye adsorption test showed that the cotton stalk-based adsorbent had a unique selective adsorption capacity for Congo red, and the maximum adsorption amount could reach 997.1 mg/g. It is worth noting that the environmental factors, such as pH value, salt ion concentration, and surfactant, had a small influence on the process. Exploring the adsorption mechanism, it was found that the process conformed to the quasi-secondary kinetic model (R 2 > 0.99) and the Langmuir isotherm model (R 2 > 0.99), in which electrostatic interactions, π-π, and hydrogen bonding played important roles in the adsorption process. Therefore, this environmentally friendly and efficient adsorbent has a broad application prospect in wastewater treatment.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
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2022
·
IF 6.449
Yan-qing Song,Sonil Nanda,Wen-jie Cong,Jie Sun,Guo-hua Dong,Aneta Magdziarz,Zhen Fang,Ajay K. Dalai,Janusz A. Kozinski
Cotton stalk was gasified to produce H 2 with Ni-La based catalysts in subcritical and supercritical water. Approximately 90% H 2 yield was obtained under optimized conditions (360 °C, 0.5 g Ni-La catalyst loading, 0.5 g biomass and 10 min) by an orthogonal design with Ni-La/spent bleaching clay (SBC) materials. In addition, the H 2 yield of rice and wheat straw increased by 41.5 and 39.5 times, respectively at optimized conditions. It was found that the activity of Ni-La materials supported on SBC ash and Al 2 O 3 was similar, with H 2 yields of 108.3% and 115.1% at 380 °C, respectively in 5 min. SBC ash provided a high specific surface area (94.4 m 2 /g) for the Ni-La catalyst. La-promoted Ni/SBC (0.19 mmol/g) had a stronger acidity than Ni/SBC (0.16 mmol/g). Ni-La/SBC had a broad reduction peak, indicating the uniform dispersion of Ni on the support. Ni-La/SBC materials not only realized the reuse of SBC but also effectively promoted the hydrothermal gasification of agricultural wastes .
研究领域:
能源生物学
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环境科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Hao Zhou,Yan Dang,Chao Li,Xinyu Chen,Yongqi Liu,Haohao Bian,Andrei Ivanets,Jiliang Zheng,Xiaoyan He,José María García-Mina,Xintai Su
Unlike traditional biomass composting humification, pyrolysis humification can rapidly convert waste biomass into humic substances (HSs) at lower temperatures and in an alkaline environment for soil remediation. This study utilized the strong alkaline solid waste carbide slag (CARBIDE) and cotton stalk (CS) for pyrolysis humification. The pyrolysis humification mechanism and effect of CARBIDE and CS were investigated using FT-IR, NMR, and Py-GC/MS. Furthermore, the ability of HSs to remediate cadmium-contaminated soil (Cd-soil) was assessed through soil property analysis, pot tests, and microbial diversity studies. The results showed that humic acid (HA) and fulvic acid (FA) had the highest yield of 19 % and 5 %, respectively, among the humic substances (HS-CS&CA) produced under the conditions of 250 ℃, reaction time of 2 h and mass ratio of CS to CARBIDE of 5: 1. At 250 ℃, CARBIDE changed the heat transfer mechanism of biomass, promoted the decomposition of more hemicellulose and protein, promoted the Deamination, Ketonization and Maillard reaction, and synthesized more HAs. HS-CS&CA had a significant remediation effect on Cd-soil. The immobilization rate of Cd was as high as 23 %, and the accumulation of Cd in maize was reduced by 65 %. At the same time, the relative abundance of beneficial bacteria such as Xanthomonadaceae and Bacillaceae for immobilizing Cd was increased, and the cycling effect of N and P was also enhanced. This study provides an innovative technical route for the rapid humification of CARBIDE and CS and its application in Cd-soil remediation.
研究领域:
环境科学
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土壤学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
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IF 7.7
Zhiwei Li,Jin Shang,Abdukeyum Abdurexit,Ruxangul Jamal,Tursun Abdiryim,Erman Su,Jin Wei
Polylactic acid (PLA) can serve as a biodegradable alternative to traditional petroleum-based plastics, but its poor impact resistance and high production costs limit its applications. In this study, different contents of epoxidized epoxy soybean oil (ESO) were added as plasticizer to melt blend with polylactic acid (PLA), polypropylene (PP) and cotton stalk fiber (CSF), examining its impact on the mechanical properties, thermal stability, microstructure, and crystallization behavior of the blends. The results indicated that ESO reacted with PLA and CSF to form branched polymers and microgels. With increasing ESO content, the blends exhibited increased initial thermal decomposition temperature, impact strength, and elongation at break, while stiffness, maximum decomposition rate, and crystallinity decreased. When the mass ratio of CSF to ESO was 2:1, the notch impact strength and elongation at break of PLA/PP/CSF/ESO blends were 1.63 times and 1.98 times higher than those of PLA/PP/CSF blends, respectively. Moreover, a reduction in surface grooves of CSF and formation of a gel layer were observed. Importantly, this study opens an effective new pathway for the utilization of waste natural fibers and the widespread application of biodegradable composite materials, contributing to environmental protection, resource conservation, and cost reduction.
研究领域:
材料科学
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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 THE ELECTROCHEMICAL SOCIETY
·
2022
·Vol. 169
·期 5
·053505
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IF 4.386
Yanfang Song,Jinxiong Wu,Jiliang Zheng,Yiwei Sun,Andrei Ivanets,Guangming Du,Xintai Su
The doping of multiple heteroatoms can improve the electrochemical properties of carbon substrates. However, in existing studies, carbon, iron and nitrogen sources are generally mixed directly and then pyrolyzed for secondary activation. This tends to form aggregates of metal particles or metal oxides and requires the consumption of large amounts of alkali and energy. Therefore, there is an urgent need to develop an environmentally friendly technology capable of uniformly doping iron and nitrogen into carbon materials. In this work, porous Fe–N–C composites were prepared at 600 °C using potassium humate (HA-K) obtained from cotton straw by low-temperature pyrolysis as the carbon source, and urea-iron complexes formed by the pre-coordination of urea and Fe as the iron and nitrogen sources. In the absence of secondary activation, the best sample Fe-NHPC-2 had a good mesoporous structure with high specific surface area (889. 01 m2 g−1). It had a high specific capacitance of 256.8 F g−1 at a current density of 0.5 A g−1. The capacitance retention was 92.6% after 10,000 cycles at a current density of 10 A g−1. In the symmetric supercapacitor application, the energy density reached 33.16 Wh kg−1 when the power density was 600.2 W kg−1.
研究领域:
材料科学
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环境科学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Lingxi Bai,Haonan Li,Xingxiang Wang,Xin Pu,Zhipeng Lin,Shuzhen Zhou,Jiangbing Li,Xiaogang Wang,Jie Li,Lingtao Kong,Lanli Bai,Jichang Liu
Biomass valorization plays a vital role in ecological conservation and the advancement of a circular economy, while posing significant scientific challenges. This work successfully constructed a novel tandem catalytic system (ZnZrOx-ZSM-5) for the efficient production of sustainable monocyclic aromatics (SMAs) via the ex-situ catalytic pyrolysis of cotton stalk. Compared to the sole ZSM-5, the tandem catalyst significantly enhanced the absolute yield of SMAs from 8.2 % to 26.8 %. Combined various structural characterization and carefully catalytic experiments, it was revealed that pyrolysis volatiles derived from cotton stalk first encounter the ZnZrOx bed-rich in oxygen vacancies and basic sites, where compounds such as AAAKs (alcohols, aldehydes, acetic acid, and ketone) and bulky alkoxy-phenols are preferentially pre-cracked into alkanes/alkenes and light phenols, respectively. Subsequently, within the ZSM-5 bed, these pre-cracked intermediates enhance the formation of SMAs by a series of reactions-including Diels-Alder condensation, dehydroxylation, and aromatization with hydrocarbon pool species. Simultaneously, GC‑MS analysis confirmed that the introduction of ZnZrOx effectively suppresses the formation of bulky polycyclic molecules (e.g., naphthalene, phenanthrene), thereby alleviating catalyst pore blockage and deactivation.
研究领域:
生物质转化
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催化化学
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能源化工
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环境科学
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绿色化学
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可再生能源
✓ 已验证
产品关联
DOI
高影响因子
SCIENCE OF THE TOTAL ENVIRONMENT
·
2020
·
IF 6.551
Jing Wang,Han Cui,Guojun Xie,Bingfeng Liu,Guangli Cao,Defeng Xing
Since there is high lignocellulose content in the cotton straw and cow manure mixture (MCC), the appropriate MCC pretreatment is important to promote the anaerobic digestion (AD) hydrolysis. This study mainly explored the effect of potassium ferrate (PF) and peroxymonosulfate (PMS) pretreatments on MCC decomposition. PMS + PF co-treatment showed a higher reduction of total solid and volatile solid than PF pretreatment and PMS pretreatment. Hydrolysis of treated MCC indicated that the PF pretreatment was more effective to the release of organics than the PMS pretreatment and the PMS + PF co-treatment. However, the PMS + PF co-treatment resulted in a higher lignin removal rate (40.4%–50.5%) than the PMS pretreatment (30.8%) and the PF pretreatment (21.4%). The PMS 1 + PF 2 co-treatment (molar ratio of 1:2) acquired the optimal lignin removal rate and the release of organics among the PMS + PF co-treatment with different dosing ratio. Potential mechanism was that PF reduction products activated PMS to produce free radicals (SO 4 − , OH), which attacked lignocellulosic components and promoted MCC decomposition. The PMS 1 + PF 2 co-treatment was deduced to be the optimal pretreatment method when considering MCC decomposition, biodegradability, and mass transfer in the bioreactor.
研究领域:
环境工程
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废物管理
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生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF SUPERCRITICAL FLUIDS
·
2020
·
IF 3.744
Jie Sun,Lujiang Xu,Guo-hua Dong,Sonil Nanda,Hu Li,Zhen Fang,Janusz A. Kozinski,Ajay K. Dalai
Nickel-based catalysts with different supports and cobalt loadings were synthesized for hydrothermal gasification of cellulose at 350 °C. The activity of Ni catalysts was found in the order of Al 2 O 3 > spent bleaching clay ash > SiO 2 with H 2 yield of 80.6%, 69.0% and 57.0%. When 6 wt. % Co was added, 10Ni-6Co/Al 2 O 3 showed the highest H 2 yield of 88.4% i.e., 1.44 times that without Co addition. Catalysts were characterized by NH 3 -TPD, TPR, XRD, BET and XPS, showing that Ni-Co alloy formation promoted H 2 production. Single-factor experiments were conducted to study variables in the presence of 10Ni-6Co/Al 2 O 3 with the selected conditions of 0.5 g biomass and 20 min at 350 °C (achieving 94.9% H 2 yield from cellulose) for gasification of rice straw, peanut shell and cotton straw with the increase in H 2 yield by 51.4, 76.0 and 67.8 times. Ni-Co/Al 2 O 3 catalysts enhanced hydrothermal gasification of actual agricultural residues.
研究领域:
化学工程
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环境科学
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催化
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可再生能源
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）