ENVIRONMENTAL RESEARCH
·
2023
·
IF 8.3
Yupeng Wu,Jianli He,Wei Liu,Weiguo Cheng,Muhammad Shaaban,Yanbin Jiang
Continuous straw returning is widely encouraged for augmenting soil organic carbon (SOC) in arable lands. However, the magnitude of changes in net SOC related to native SOC mineralization and new SOC development upon fresh straw incorporation remains elusive, particularly in soils after continuous straw returning with different strategies. To address this, soil that had undergone nine years of straw returning with different strategies (NS, non-straw returning; DS, direct straw returning; IS, indirect straw returning) was incubated with fresh 13 C-labeled straw for 45 days. Fresh straw incorporation stimulated native SOC-derived CO 2 emission in DS soil, which in turn promoted straw-derived CO 2 emission in IS soil. Overall, the amounts of newly developed SOC from straw (2.41–2.59 g C/kg soil) overcompensated for the native SOC losses (0.91–1.37 g C/kg soil) by mineralization, and led to net C sequestration in all treatments. No obvious difference was found in the amounts of SOC sequestrated from straw between the DS and NS soils, while the amount of native SOC mineralization increased by 40–50% in the DS soil relative to other treatments, thus resulting in lower net C sequestration in the DS soil (1.21 g C/kg soil) than IS and NS soil (1.43 and 1.65 g C/kg for IS and NS soil, respectively). Spearman's correlation analyses indicated a significant ( p < 0.01 ) and positive correlation between SOC contents and native soil C mineralization, while the soil microbial index played a greater role in influencing fresh straw sequestration ( p < 0.01 ). In conclusion, the DS soil showed a weaker effect on SOC sequestration than IS after 9 years of practices, upon fresh straw incorporation. This difference may be attributed to the magnitude of native SOC mineralization in the soil. Besides the straw-C input rate, results emphasize that native soil C protection should be also considered in long-term SOC sequestration practices.
研究领域:
农业科学
·
土壤学
·
环境科学
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DOI
PubMed
高影响因子
BIORESOURCE TECHNOLOGY
·
2023
·
IF 11.4
Hossain M. Zabed,Suely Akter,Mudasir A. Dar,Jamila A. Tuly,Mukesh Kumar Aswathi,Junhua Yun,Jia Li,Xianghui Qi
This study aimed to produce enhanced fermentable sugars from a novel stover system through the bioprocessing of its soluble sugars and insoluble carbohydrates. The pretreatment conditions were optimized for this high sugar-containing stover (HSS) to control inhibitor formation and obtain enhanced fermentable sugar concentrations. The optimum temperature, acid loading, and reaction time for the pretreatment were 155 °C, 0.5%, and 30 min, respectively, providing up to 97.15% sugar yield and 76.51 g/L total sugars at 10% solid-load. Sugar concentration further increased to 126.9 g/L at 20% solid-load, generating 3.89 g/L acetate, 0.92 g/L 5-hydroxymethyl furfural, 0.82 g/L furfural, and 3.75 g/L total phenolics as inhibitors. To determine the effects of soluble sugars in HSS on fermentable sugar yield and inhibitor formation, sugar-removed HSS was further studied under the optimum conditions. Although prior removal of sugars exhibited a reduction in inhibitor generation, it also decreased total fermentable sugar production to 115.45 g/L.
研究领域:
生物技术
·
可再生资源工程
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DOI
PubMed
高影响因子
ENVIRONMENTAL GEOCHEMISTRY AND HEALTH
·
2022
·Vol. 45
·期 6
·3331-3344
·
IF 4.898
Li Xinyue,Jiang Yanyan,Chen Tianya,Zhao Pan,Niu Sen,Yuan Muzi,Ma Xiulan
The type of feedstock and pyrolysis temperature are the main reasons affecting the properties of the resulting biochar. Therefore, this paper investigates the effects of different feedstocks (peanut shell, corn straw and soybean straw) and different pyrolysis temperatures (300, 450 and 600 ℃) on the structural morphology and elemental composition of the resulting biochar. The optimum pyrolysis temperature of 600 ℃ was selected based on the comparison of the adsorption of NFX (norfloxacin) by the biochar prepared at different temperatures. Characterization of biochar materials using x-ray diffractometer, fourier transform infrared spectrometer and scanning electron microscope to study the changes in the physicochemical and structural properties of biochar. The results showed that the pH, surface area and ash content of biochar are increased with increasing temperature. The results of isothermal adsorption and adsorption kinetics experiments showed that the adsorption processes of the three biochar species on NFX were consistent with the Langmuir model and Pseudo-second order kinetic model. The adsorption process occurred in the surface layer of the biochar and was dominated by chemisorption. The inhibition of the adsorption of NFX was more obvious with the higher valence state of cations and the higher ion concentration. The adsorption mechanism of biochar on NFX includes pore filling, hydrogen bonding and electrostatic interactions.
研究领域:
环境科学
·
化学工程
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产品关联
DOI
PubMed
高影响因子
Materials
·
2020
·Vol. 13
·期 2
·437
·
IF 3.057
Heming Song,Hongge Jia,Qingji Wang,Xinyi Zhao,Guoxing Yang,Mingyu Zhang,Hailiang Zhou,Shuangping Xu,Yu Zang,Yazhen Wang,Liqun Ma
Corn straw is an agricultural waste. The system for extracting cellulose from corn straw at a high temperature has been widely reported by researchers. However, the system for extracting cellulose from corn straw at a low temperature has been rarely reported. In this paper, a new system for extracting cellulose from corn straw at a low temperature was reported for the first time. This new system is designated as the low temperature laccase system (LTLS). Cellulose was successfully extracted from corn straw by the LTLS, and the used solution could be recycled. Therefore, the low temperature laccase system is an environmentally-friendly system. The cellulose content in corn straw is 30–40%. The yield of cellulose extracted by LTLS was 33%. The obtained cellulose product was creamy white. The extracted cellulose samples were characterized by using infrared spectroscopy (IR), thermogravimetry (TG), and X-ray diffraction (XRD). The results were consistent with that of standard cellulose. We confirmed that the LTLS extracted cellulose from corn straw with high purity.Keywords:cellulose;corn straw;low temperature;laccase
研究领域:
生物化学
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环境科学
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DOI
PubMed
高影响因子
JOURNAL OF ANIMAL PHYSIOLOGY AND ANIMAL NUTRITION
·
2023
·
IF 2.7
Gongyan Liu,Haitao Sun,Ce Liu,Liya Bai,Liping Yang,Wenxue Jiang,Shuxia Gao
This study was conducted to investigate the effects of different dietary fibre sources on growth performance, gastrointestinal tract development, caecal fermentation and bacterial composition in the caecal contents of rabbits. A total of 120 35-day-old weaned Minxinan black rabbits were divided into three groups and fed a diet composed of peanut straw powder (Group A), alfalfa powder (Group B) and soybean straw powder (Group C) as the main fibre source. The final body weight and average daily gain in Group B were higher than those in Group C, and the average daily feed intake and feed conversion ratio in Group A were lower than those in Group C ( p < 0.05). The relative weights of the stomach, small intestine and caecum of rabbits in Group C were higher than those in Groups of B and A, and the relative weights of the caecal contents in Group C were lower than those in Groups A or B ( p < 0.05). The pH value and propionic acid, butyric acid and valeric acid concentrations in the caecum of Group C were lower than those in the caecum of Groups A or B, and the concentration of acetic acid in the caecum was lower ( p < 0.05). The dominant microbes in the caecal contents of Minxinan black rabbits were Firmicutes, Bacteroidetes and Proteobacteria at the phylum level, and the number of species, Chao1 index and ACE index measured was different between the B–C and A–C groups ( p < 0.05). Different dietary fibre sources could affect the growth performance, gastrointestinal tract development and intestinal microbiota of rabbits, and the nutritional value of alfalfa powder was better than that of peanut straw and soybean straw.
研究领域:
动物营养
·
微生物学
·
胃肠生理学
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DOI
PubMed
高影响因子
Royal Society Open Science
·
2020
·Vol. 7
·期 3
·
IF 2.646
Yazhen Wang,Shuang Li,Liqun Ma,Shaobo Dong,Li Liu
Corn stalk was used as the initial material to prepare a corn stalk matrix-g-polyacrylonitrile-based adsorbent. At first, the corn stalk was treated with potassium hydroxide and nitric acid to obtain the corn stalk-based cellulose (CS), and then the CS was modified by 2-bromoisobutyrylbromide (2-BiBBr) to prepare a macroinitiator. After that, polyacrylonitrile (PAN) was grafted onto the macroinitiator by single-electron transfer living radical polymerization (SET-LRP). A novel adsorbent AO CS-g-PAN was, therefore, obtained by introducing amidoxime groups onto the CS-g-PAN with hydroxylamine hydrochloride (NH2OH · HCl). FTIR, SEM and XPS were applied to characterize the structure of AO CS-g-PAN. The adsorbent was then employed to remove Pb(II) and Cu(II), and it exhibited a predominant adsorption performance on Pb(II) and Cu(II). The effect of parameters, such as temperature, adsorption time, pH and the initial concentration of metal ions on adsorption capacity, were examined in detail during its application. Results suggest that the maximum adsorption capacity of Pb(II) and Cu(II) was 231.84 mg g–1 and 94.72 mg g−1, and the corresponding removal efficiency was 72.03% and 63%, respectively. The pseudo-second order model was more suitable to depict the adsorption process. And the adsorption isotherm of Cu(II) accorded with the Langmuir model, while the Pb(II) conformed better to the Freundlich isotherm model.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
PubMed
高影响因子
REACTIVE & FUNCTIONAL POLYMERS
·
2025
·
IF 5.1
Tengfei Han,Shufen Zhang,Benzhi Ju
Stalk is an important biomass resource and converting it directly into high value-added products is a major challenge. Herein, we have cleverly utilized three novel techniques, mechanochemistry, Deep eutectic solvents (DES), and dynamic cross-linking, to achieve one-step in-situ plasticization of virtually worthless corn stalk into reprocessable thermoset plastics. This preparation strategy has many advantages, such as cheap and easy availability of raw materials, no need for catalysts, no need for pretreatment of raw materials, and no need for separation and purification of products. The stalk plastics have good mechanical strength, thermal stability, plasticity and reprocessability. In addition, cellulose plastic was prepared as a control experiment for stalk plastic, and the constitutive relationship between the structure of various components in stalk and the performance of plastic was deeply investigated. This strategy of developing new plastics from agricultural and forestry waste in a simple and environmentally friendly way will open up a whole new avenue for the production of more competitive bio-based plastics.
研究领域:
材料科学
·
高分子科学
·
绿色化学
·
生物质利用
·
农业废弃物管理
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2021
·
IF 7.086
Haris Muhammad,Ting Wei,Geng Cao,ShengHui Yu,XinHao Ren,HongLei Jia,Atif Saleem,Li Hua,JunKang Guo,Yongtao Li
The application of crops straw and biochar in trace metals remediation from the contaminated environment attracted more and more attention during the past decade. Although there has been some review work on the mechanism of trace metals stabilization by crops straw, the effects and mechanisms of interaction among soil indigenous-microbes and crops-straw for trace metal adsorption and stabilization is still unclear. In this study, the dynamic effects along with potential mechanisms of wheat-straw (WS), wheat-straw biochar (WBC) and biologically modified wheat-straw (BMWS) were conducted to investigate the adsorption, leaching behaviour, chemical fractions and bioavailability of cadmium (Cd). The results showed that the biosorption capacity (q e ) was most elevated in the BMWS treatment (14.42 mg g −1 ) as compared to WBC (6.28 mg g −1 ) and WS (4.20 mg g −1 ). The application of BMWS, WBC and WS at the rate of 3% significantly reduced Cd concentration in leachate to 53, 45 and 21% respectively, as compared to control. The addition of BMWS reduced the exchangeable Cd fraction resulted an increase in organic matter and carbonate bound Cd fraction in the soil. The DTPA extractable Cd was significantly decreased by 31.2 and 28.6% with the application of BMWS and WBC at 3% w/w respectively as compared to control. The research results may provide a novel perceptive for the development of functional materials and strategies for eco-friendly and sustainable trace metal remediation in contaminated soil and water by combination of straw and soil-indigenous microorganisms .
研究领域:
环境科学
·
土壤学
·
微生物学
·
污染控制
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产品关联
DOI
PubMed
高影响因子
GREEN CHEMISTRY
·
2014
·Vol. 17
·期 1
·453-459
·
IF 6.852
Muge Niu,Yucui Hou,Shuhang Ren,Weize Wu,Kenneth N. Marsh
Formic acid (FA) is an important material widely used in the chemical industry and in processes involved in energy storage and transformation. In this work, production of FA from wheat straw, an abundant lignocellulosic biomass, in NaVO3–H2SO4 aqueous solution with molecular oxygen (O2) was studied. The conversion showed high efficiencies: 47% (based on carbon, 75.2% based on mass) of FA and 7.3% (based on carbon, 7.6% based on mass) of acetic acid were obtained. The products mainly come from polysaccharides (hemicellulose and cellulose) in wheat straw. Acetic acid is derived from the acetyl groups in (1) the hemicellulose structure or (2) the deep hydrolysis product, levulinic acid. The removal of each lignocellulosic component in wheat straw follows the order: hemicellulose, lignin and cellulose. The catalytic system shows good reusability, and multiple feedings led to a high concentration of FA, which is beneficial to reduce FA–water separation cost.
研究领域:
生物化学
·
可再生能源
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产品关联
DOI
高影响因子
RADIOCHIMICA ACTA
·
2024
·Vol. 112
·期 3
·161-173
·
IF 1.4
Hongtao Xia,Yuting Liu,Yang Wang,Zihao Feng,Qi Ren,Jianqi Lv,Yang Li,Yanjun Du,Yun Wang
An innovative phytic acid modified reed straw-derived hydrochar composite (PA-C-RBC) was prepared by using inexpensive reed straw and non-toxic phytic acid for the removal of uranium(VI) from aqueous environment. Several characterization results showed that PA-C-RBC was rough and porous with a large number of hydroxyl, carboxyl, and phosphate groups. The uranium(VI) adsorption process by PA-C-RBC conformed to pseudo-second-order kinetic and Langmuir models, and the theoretical maximal adsorption capacity could attain 418.78 mg/g at pH 5.0. PA-C-RBC had 72.66 % of selectivity and 6772.99 mL/g of distribution coefficient for U(VI). Due to the strong chelating between the hydroxyl and phosphate groups on PA-C-RBC and U(VI), PA-C-RBC had excellent adsorption selectivity. These finding highlighted a high potential for removing U(VI) from aqueous solutions.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
RENEWABLE ENERGY
·
2025
·
IF 9.1
Zhen He,Quanwei Lv,Xia Jiang,Yang Su,Guangmei Cao,Xianggang Zhang,Lingling Xie,Haijun Wu
The co-pyrolysis of straw and polyethylene (PE) enhances pyrolysis oil quality by reducing oxygenated compounds and increasing hydrocarbons. However, the synergistic mechanisms between straw's main components (cellulose, hemicellulose, and lignin) and PE are not well understood. This study investigated these interactions, revealing a two-stage reaction: cellulose and hemicellulose dominate the first stage, while PE and lignin dominate the second. Significant synergistic effects were observed at 550 °C during the co-pyrolysis of straw and PE, resulting in at least a 17.84 % increase in alkanes and a decrease in oxygenated compounds. Free radicals from PE facilitated the cleavage of carbonyl bonds and promoted deoxygenation, leading to more hydrocarbons. Hemicellulose inhibited ester conversion (ΔV esters = −3.00 %), while lignin suppressed ketone and alcohol formation (ΔV ketones = −12.14 %, ΔV alcohols = −1.07 %). These findings align with straw-PE co-pyrolysis results, providing new insights into the synergistic mechanisms between lignocellulosic biomass and plastics.
研究领域:
能源与环境科学
·
化学工程
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产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2016
·
IF 4.917
Hongsen Zhang,Gang Liu,Jian Zhang,Jie Bao
High titer gluconic acid and xylonic acid were simultaneously fermented by Gluconobacter oxydans DSM 2003 using corn stover feedstock after dry dilute sulfuric acid pretreatment, biodetoxification and high solids content hydrolysis. Maximum sodium gluconate and xylonate were produced at the titer of 132.46 g/L and 38.86 g/L with the overall yield of 97.12% from glucose and 90.02% from xylose, respectively. The drawbacks of filamentous fungus Aspergillus niger including weak inhibitor tolerance, large pellet formation and no xylose utilization were solved by using the bacterium strain G. oxydans . The obtained sodium gluconate/xylonate product was highly competitive as cement retarder additive to the commercial product from corn feedstock. The techno-economic analysis (TEA) based on the Aspen Plus modeling was performed and the minimum sodium gluconate/xylonate product selling price (MGSP) was calculated as $0.404/kg. This study provided a practical and economic competitive process of lignocellulose utilization for production of value-added biobased chemicals.
研究领域:
生物工程
·
可再生资源利用
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）