Journal of Environmental Chemical Engineering
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2024
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IF 7.4
Jun Zheng,Mengjie Li,Zhen Wang,Hongbo Chen
The development of efficient pretreatment technologies is an urgent task for the waste-activated sludge treatment industry. In this study, a novel sodium percarbonate (SPC)-assisted thermal hydrolysis (TH) pretreatment method was proposed and evaluated for its performance in sludge solubility and enhancing methane production. SPC (0.1 g/g total suspended solids, 24 h) assisted TH (140 °C, 30 min) pretreatment increased methane production by 37 % compared to the control, from 130 ± 4 mL/g volatile solids (VS) to 178 ± 5 mL/g VS. The free radicals produced by SPC induced the destruction of extracellular polymeric substances and the rupture of sludge cells, thus facilitating the release of organic matter such as proteins and polysaccharides.TH destroyed the sludge flocs with high temperature and high pressure while activating SPC to produce more free radicals, which further increased the solubility of the sludge. In addition, the SPC-assisted TH pretreatment enriched Firmicutes and Methanobacterium sp. This study revealed the synergistic effect of SPC and TH, providing an economical, effective, and environmentally friendly pretreatment technology for sludge treatment and methane production.
研究领域:
环境科学
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微生物学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Wenlong Pang,Bin Li,Yufeng Wu,Qing Zeng,Jun Yang,Yu Zhang,Shaonan Tian
Biodegradable plastics such as Poly (butylene adipate-co-terephthalate) (PBAT) have been extensively utilized in numerous fields. However, post-consumption, PBAT tends to pollute the environment and waste resources. Herein, a novel approach employing a 1,4-butanediol-alkali combined method for the hydrolysis of PBAT is introduced. At 130 °C, with a reaction time of 60 min, the hydrolysis rate of PBAT exceeds 99 %. Subsequently, a two-step synthesis rapidly produces a foam nickel-supported NiOOH catalyst for the electrocatalytic reformation of the PBAT hydrolysate into higher-value chemicals (succinate salts) at an impressive current density of 100 mA cm −2 at 1.43 V (vs. RHE) and a Faradaic efficiency of 97.6 %. Experimental results and density functional theory calculations have elucidated the active state changes of the foam nickel-supported NiOOH catalyst and the intermediates in the oxidation of 1,4-butanediol to succinate, alongside the reaction mechanism. This study offers a viable approach for the degradation of PBAT plastic through a 1,4-butanediol-alkali method and the rapid preparation of a foam nickel-supported NiOOH electrocatalyst, achieving the upgraded recycling of post-consumer biodegradable PBAT plastic.
研究领域:
环境科学
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材料科学
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电化学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2023
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IF 4.2
Hongjie Chen,Haoquan Hu
Depolymerization of polyethylene terephthalate (PET) in alkaline mixed solutions can be carried out efficiently. However, the direction of the suitable solvent system selection is unclear, limiting the development of this approach. To address this problem, the effect of solvents on the alkaline hydrolysis of PET is discussed from the perspective of hydroxide reactivity. Dimethyl sulfoxide, 1,3-dimethyl-2-imidazolidinone (DMI), tetrahydrofuran, dioxane, water, toluene, and CCl4 were used as a cosolvent for the alkaline hydrolysis of PET in ethylene glycol (EG) to regulate the hydroxide reactivity. The results show that a cosolvent that can act as a hydrogen-bond acceptor but not as a hydrogen-bond donor is suitable because this cosolvent can compete with hydroxide for hydrogen-bond formation with EG and improve the hydroxide reactivity. According to this direction, a PET recycling scheme based on a DMI-EG-NaOH system is designed, which is highly efficient and cost-effective.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
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IF 7.3
Binyu Zhang,Yutao Yang,Peidong Li,Junzheng Yu,Huiru Wu,Tianyu Ren,Cheng Cai,Lalehvash Moghaddam,Tianhan Zhu,Yang Luo,Yonggan Li,Jun Xie,Chenguang Wang,Yanbin Cui
Hydroxycinnamic acids (HCAs), including ferulic acid (FA) and p-coumaric acid (p-CA), are bioactive compounds with antioxidant, anticancer, and antiviral properties. Sugar cane bagasse (SCB), an underutilized agro-industrial byproduct from the sugar industry, is a promising feedstock for HCA extraction due to its high abundance. However, conventional alkaline hydrolysis methods for HCA extraction are hampered by prolonged processing times and oxidative product degradation. Herein, we address these limitations with a continuous anaerobic alkaline hydrolysis process employing a high-pressure screw reaction (HPSR) system. Operating under pressurized inert conditions, the HPSR system eliminates oxidative degradation while achieving rapid reaction kinetics. Instant heating and cooling allowed efficient production of HCAs (28 mg/g, ∼59% of the total extractable HCAs) in just 4 min, achieving a production rate of 8.33–11.07 mg/g biomass/min within 2 min─an order of magnitude higher than conventional batch systems. Integrating high solid-to-liquid ratio (1:10 w/v) production and downstream purification, the process achieved the scalable production of high-purity (93%) HCAs, enhancing the industrial relevance of this continuous process. To sum up, this work establishes a scalable, energy-efficient platform for valorizing lignocellulosic waste into high-value products, bridging a critical gap between laboratory-scale innovation and industrial implementation.
研究领域:
生物化学
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农业工程
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食品科学
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工业微生物学
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2020
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IF 3.573
Liangfeng Xiao,Weifeng Liu,Jinhao Huang,Hongming Lou,Xueqing Qiu
The technical enzymatic hydrolysis lignin (EHL) and alkali lignin (AKL) were pretreated via alkaline depolymerization and organic solvent extraction process, respectively. The molecular weight of lignin was lowered and the molecular weight distribution was narrowed, while the content of phenolic hydroxyl group increased after the pretreatment of alkaline depolymerization or solvent extraction. The lignin extracted with ethyl acetate got the lowest molecular weight and highest phenolic hydroxyl group content, showing even better free radical scavenging ability than the commercial Irganox1010. Lignin/SBS elastomer composites were prepared with even dispersion of lignin in the SBS matrix with an average particle size close to 40 nm. It was demonstrated that the alkali lignin extracted with ethyl acetate showed the best improvement on the antioxidant performance of SBS and was comparable to that of Irganox1010 in the SBS elastomer, showing great application potential.
研究领域:
材料科学
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化学工程
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高分子科学
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产品关联
DOI
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-11
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IF 16.6
Ma Wenjiao,Liu Tingting,Xu Chen,Lei Chengjun,Jiang Pengjie,He Xin,Liang Xiao
The battery chemistry aiming for high energy density calls for the redox couples that embrace multi-electron transfer with high redox potential. Here we report a twelve-electron transfer iodine electrode based on the conversion between iodide and iodate in aqueous electrolyte, which is six times than that of the conventional iodide/iodine redox couple. This is enabled by interhalogen chemistry between iodine (in the electrode) and bromide (in the acidic electrolyte), which provides an electrochemical-chemical loop (the bromide-iodate loop) that accelerates the kinetics and reversibility of the iodide/iodate electrode reaction. In the deliberately designed aqueous electrolyte, the twelve-electron iodine electrode delivers a high specific capacity of 1200 mAh g −1 with good reversibility, corresponding to a high energy density of 1357 Wh kg −1 . The proposed iodine electrode is substantially promising for the design of future high energy density aqueous batteries, as validated by the zinc-iodine full battery and the acid-alkaline decoupling battery.
研究领域:
电化学
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电池技术
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材料科学
✓ 已验证
DOI
高影响因子
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