RSC Advances
·
2015
·Vol. 5
·期 74
·60330-60338
·
IF 3.84
Jianan Shen,Leli Wang,Yongjun Men,Ying Wu,Qiaohong Peng,Xiaoling Wang,Rui Yang,Khalid Mahmood,Zhengping Liu
The effect of water and methanol on the dissolution and gelatinization of corn starch in [MMIM][(MeO)HPO2] was investigated by optical microscopy and differential scanning calorimetry. The presence of an appropriate amount of water can accelerate the dissolution while methanol has the opposite effect. A [MMIM][(MeO)HPO2]/water mass ratio of 7/3 is the best ratio for corn starch to disperse a [MMIM][(MeO)HPO2]–water mixture in, since it can dissolve starch at lower temperature. When methanol was added to the mixture of [MMIM][(MeO)HPO2]/water at a ratio of 8/2 (w/w), the methanol accelerated the dissolution process of the corn starch, since it can penetrate the starch granules and swell the outer layer of granules with water. It is demonstrated that [MMIM][(MeO)HPO2]/water/methanol at a ratio of 8/2/3 (w/w/w) is a good mixed solvent like [MMIM][(MeO)HPO2]/water 7/3 (w/w) for corn starch.
研究领域:
食品科学
·
化学工程
✓ 已验证
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
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 51
·33069-33078
·
IF 4.036
Xia Wang,Wulan Zeng,Chunling Xin,Xiangjun Kong,Xiude Hu,Qingjie Guo
The accumulation and incineration of crop waste pollutes the environment and releases a large amount of CO2. In this study, corncob crop waste was directly activated using solid KOH in an inert atmosphere to prepare porous activated carbon (AC) to capture CO2, and to introduce N-containing functional groups that favour CO2 adsorption, urea was mixed with corncob and KOH to prepare N-doped AC. The physical and chemical properties of the AC were characterized, and the effects of the mass ratio of KOH and urea to corncob, the activation temperature and time as well as regeneration were investigated to explore the optimal preparation process. The pores in the AC are mainly micropores, with the specific surface area and pore volume reaching 926.07 m2 g−1 and 0.40 cm3 g−1 for KOH-activated corncob and 1096.70 m2 g−1 and 0.48 cm3 g−1 after N-doping; the C–O plus O–H ratio and the –NH– ratio, which favour CO2 adsorption in N-doped AC were 6.04 and 1.92%, respectively. The maximum adsorption capacities for KOH-activated corncob before and after N-doping were 3.49 and 4.58 mmol g−1, respectively, at 20 °C and remained at 3.44 and 4.52 mmol g−1 after ten regenerations. The prepared corncob-based AC showed good application prospects for CO2 capture.
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
BIORESOURCE TECHNOLOGY
·
2015
·
IF 4.494
Hongsen Zhang,Jian Zhang,Jie Bao
This study reported a high titer gluconic acid fermentation using dry dilute acid pretreated corn stover (DDAP) hydrolysate without detoxification. The selected fermenting strain Aspergillus niger SIIM M276 was capable of inhibitor degradation thus no detoxification on pretreated corn stover was required. Parameters of gluconic acid fermentation in corn stover hydrolysate were optimized in flasks and in fermentors to achieve 76.67 g/L gluconic acid with overall yield of 94.91%. The sodium gluconate obtained from corn stover was used as additive for extending setting time of cement mortar and similar function was obtained with starch based sodium gluconate. This study provided the first high titer gluconic acid production from lignocellulosic feedstock with potential of industrial applications.
研究领域:
生物技术
·
发酵工程
✓ 已验证
DOI
PubMed
高影响因子
ENVIRONMENTAL TECHNOLOGY
·
2022
·
IF 3.475
Yuxing Tong,Qunshan Yan,Song Gao,Bin Xiong,Xiangbing Tang,Zhichang Liu,Pengfei Li,Ming Huang,Ziwei Wang,Xi Le,Wei Pei,Zejun Dai,Zhe Xiong,Yi Wang
In this study, KMnO4 modification was proved to effectively increase the Ni2+ adsorption capacity of biomass. In order to clarify the KMnO4 modification mechanism, the Ni2+ adsorption characteristics of KMnO4 modified corncob (PPCB) under adsorption time, pH and Ni2+ concentration were studied. The results showed that the adsorption was the pseudo second-order kinetic process, indicating that chemisorption was the dominated process, which followed the Langmuir isotherm model and the highest Ni2+ adsorption capacity of PPCB reached 35.6 mg/g. By KMnO4 modification, the corncob was oxidized to generate carboxylates, and the MnO2 (reduction product) was loaded on the modified corncob, both carboxylates and MnO2 increased the Ni2+ adsorption capacity of PPCB. The molecular dynamic results indicated the carboxylate structures had the strongest adsorption capacity. Moreover, the Ni2+ removal efficiency of KMnO4 modified biomass decreased linearly with the increase of lignin content in biomass, while KMnO4 modified lignin showed a good adsorption performance, indicating that the cross-linked structures between lignin and other components in the biomass could inhibit the adsorption capacity of PPCB.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
KEY ENGINEERING MATERIALS
·
2022
·
IF 0
Shariena Shamsul Bahari,Yuen Mei Lian,Ros Azlinawati Ramli,Lee Siew Ling
Textile dyeing often employs reactive dyes. The dye wastewater contains hazardous materials and is toxic to humans and the environment. Photodegradation using a semiconductor photocatalyst is a promising alternative approach for water purification and wastewater treatment. However, the photocatalyst’s low adsorption ability is a problem in the photocatalysis process. To compensate for this shortcoming, photocatalyst content must be combined with an adsorbent. Raw corn cob and titanium dioxide (TiO2) were used in this photocatalysis. Due to a synergistic impact, raw corn cob’s ability to adsorb and titanium dioxide’s ability to photodegrade organic pollutants from water bodies is expected to boost the removal performance. The degradation of Reactive Blue 4 (RB4) as a targeted dye was carried out in this research using a suspended mixture of commercial anatase TiO2 and raw corn cob under UV light. The effect of initial pH solution, initial dye concentration and contact time, TiO2-corn cob dosages, and the influence of other pollutants were investigated as factors influencing photodegradation-adsorption of RB4. The high removal rate of RB4 was obtained at a low pH of 2 and RB4 concentration of 40 ppm. The increased dose of TiO2-corn cob improved the RB4 dye removal performance. In conclusion, combining photodegradation and adsorption systems as a hybrid treatment method resulted in a synergistic increase in the efficiency of RB4 removal.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
Agronomy-Basel
·
2025
·Vol. 15
·期 8
·1807
·
IF 3.4
Tao Shen,Jianping Li,Chao Wang,Haihong Fan,Yunxiao Zheng,Yifan Liu,Shuzhen Zhang,Liying Zhu,Xiaoyan Jia,Yongfeng Zhao,Wei Song,Jinjie Guo
Kernel test weight (KTW) is one of the important assessment indexes of maize quality grade and one of the important influencing factors of yield. This study analyzed 12 traits related to KTW in 321 maize inbred lines using multivariate methods. The principal component analysis (PCA) indicated that the four PCs covered 78.176% of the information of the 12 traits in 321 maize inbred lines. Cluster analysis categorized the maize lines into six groups, identifying 16 elite inbred lines with the highest KTW. A stepwise regression model for KWT evaluation was developed using four PCA traits: starch content, amylopectin content, 100-kernel weight, and kernel circumference. The findings of this study serve as a valuable reference point for the genetic improvement of maize germplasm re-sources in kernel test weight and the creation of high kernel test weight maize resources.
研究领域:
作物遗传学
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植物育种学
·
数量性状分析
✓ 已验证
产品关联
DOI
高影响因子
BIORESOURCE TECHNOLOGY
·
2025
·
IF 9
Xiwen Jia,Dong Liu,Jiajie Xu,Hui Zhang,Luoyang Liu,Lujia Han,Weihua Xiao,Suan Shi
In this study, caproate was synthesized from corn stover through sequential fermentation, and biochar was prepared from unhydrolyzable corn stover by pyrolysis to utilize full-component of corn stover. The results indicate that the caproate concentration in the unhydrolyzable corn stover biochar (UCSB) group was 2.2 times higher than that of the control group, and the fermentation start-up time was shortened by 18 days. Mechanistic analysis suggested that the rough surface of UCSB facilitated microbial colonization and reduced product inhibition. Genes expression analysis further demonstrated that UCSB significantly upregulated crucial functional genes responsible for ethanol oxidation and the reverse β -oxidation pathway, ultimately resulting in enhanced caproate production. The successful utilization of UCSB derived from unhydrolyzable solid residue effectively boosted fermentation, leading to a 37 % increase in the carbon utilization efficiency of corn stover. This study offering valuable insights for the high-value and full-component utilization of lignocellulosic biomass.
研究领域:
生物技术
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Ruiqi Liu,Lihong Wang,Tao Lan,Jin Hua,Jingxuan Zhang
In this study, an innovative method for preparing biochar aimed at enhancing the QuEChERS pesticide residue analysis pretreatment technology was developed. The method is ecofriendly and cost-effective. A microporous biochar with a high specific surface area (351.43 m²·g −1 ) was successfully produced using corn stover as the raw material. The preparation process involved sodium hypochlorite delignification, hydrothermal pyrolysis, and slow pyrolysis. This biochar effectively removes pigments and lipids from chrysanthemum extracts, and its three-dimensional structure offers additional adsorption sites for planar compounds and sulfonylurea pesticides. The cost for preparing biochar is approximately 0.5 USD/g, which is significantly lower than that of traditional GCB, offering substantial advantages in both cost and environmental sustainability. The biochar developed in this study not only provides an efficient and economical material for pesticide residue analysis pretreatment but also contributes significantly to the advancement and application of ecofriendly pesticide residue detection technologies.
研究领域:
环境科学
·
分析化学
✓ 已验证
产品关联
DOI
高影响因子
RENEWABLE ENERGY
·
2018
·
IF 4.9
Qiong Wang,Wei Qi,Wen Wang,Yu Zhang,Noppol Leksawasdi,Xinshu Zhuang,Qiang Yu,Zhenhong Yuan
Furfural is considered to be one of the top 30 potential chemicals derived from lignocellulosic biomass . Compared to conventional diluted acid catalysis, furfural production from lignocellulose was significantly improved by the addition of an immiscible organic solvent into the diluted acid solution. However, high conversion is usually achieved under a high water/solid ratio (>1, v/m), and the furfural product is distributed in both the organic solvent phase and the aqueous phase , leading to difficulty of furfural recovery and increasing the cost of furfural production. The present work investigated corncob conversion in a diluted sulfuric acid-toluene biphasic system with extremely low water/solid ratios (≤1). It was found that a high furfural yield (65.67 mol%) was achieved in a very short time (10 min) under a high solid loading of 200% (in the aqueous phase) under the conditions of 1.5 MPa N 2 , 0.5:1 water/solid ratio (v/w), 10:1 toluene/solid ratio (v/m), and 3.85 wt% H 2 SO 4 (in the aqueous phase). After the reaction, no aqueous phase existed, and furfural was completely accumulated in the toluene phase. Further research showed that the majority of the furfural content (84.73%, GC-MS detection) was in the toluene phase, which is beneficial for its recovery. This work provides an effective and inexpensive method for the production of furfural from lignocellulose.
研究领域:
生物化学
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
CELLULOSE
·
2019
·Vol. 26
·期 15
·8313-8323
·
IF 3.917
Wang Chao,Yang Guihua,Zhang Xueming,Shao Lupeng,Lyu Gaojin,Mao Jianzhen,Liu Shijie,Xu Feng
Levulinic acid (LA) production from corncob acid hydrolysis residues (CAHR) using FeCl 3 as Lewis acid catalyst in green solutions of salt was investigated. The reaction kinetic relationships were determined in the temperature range of 160–180 °C, with FeCl 3 concentrations of 0.12–0.36 M, and a reaction time of 0–60 min. The maximum LA concentration of 59.0 mol% (24.5 g/L) was achieved at 170 °C in a 30% NaCl solution containing 0.24 M FeCl 3 . A pseudo first-order kinetic model was proposed to describe the cellulose deconstruction to LA. The model agreed perfectly with the evolution in the concentrations of the major compounds such as glucose, 5-hydroxymethylfurfural and LA during the CAHR hydrolysis. The kinetic model developed for CAHR was in good agreement with that previously developed for other lignocellulosic systems. Based on our kinetic model and reaction system, the LA yield is increased at the lower end of the temperature range with the higher acid concentrations. The results indicated that the concentrated seawater after desalination could be a green solvent in the biorefinery.
研究领域:
化学工程
·
生物技术
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
Materials Research Express
·
2019
·Vol. 6
·期 6
·065615
·
IF 1.449
Miao Liang,Jing Wang,Min Zhao,Jiaxiao Cai,Mingjian Zhang,Nan Deng,Bing Wang,Bin Li,Ke Zhang
A modified hydrothermal carbonization (HTC) process in the presence of borax was developed to produce uniform and monodispersed micro-carbon spheres. Corn starch was used as carbon precursor and borax acts as a structure directing agent. The introduction of borax could catalytically transform the starch into hydroxymethylfurfural (HMF) and favoring the rapid nucleation and slow growth of particle owing to the buffer function of borax additive. The inclusion of borax thus allowed for the controlling of particles morphology as well as tailoring the particle diameters. Uniform solid carbon spheres with a narrow particle size distribution, ranging from 0.6 to 2 μm, was demonstrated by turning the borax concentration and the reaction time in a single-step hydrothermal process. The retained boron content and chemical structure of the carbonaceous products could be adjusted as revealed by inductively coupled plasma (ICP) and Fourier transformed infrared (FTIR) analysis. Furthermore, the boron-dopant increased the final product's thermostability from 536 °C to 629 °C at 0.70 wt% boron content. This method therefore also provides a facile and novel approach to prepare boron-doped carbon materials.
研究领域:
材料科学
·
化学工程
✓ 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）