INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
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2022
·Vol. 23
·期 14
·7504
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IF 6.208
Mingzhu Yao,Yun Ma,Lu Liu,Chengrong Qin,Haibo Huang,Zhiwei Zhang,Chen Liang,Shuangquan Yao
The treatment of oily sludge (OS) can not only effectively solve environmental pollution but also contribute to the efficient use of energy. In this study, the separation effect of OS was analyzed through sodium lignosulfonate (SL)-assisted sodium persulfate (S/D) treatment. The effects of SL concentration, pH, temperature, solid–liquid ratio, revolving speed, and time on SL adsorption solubilization were analyzed. The effects of sodium persulfate dosage, demulsification temperature, and demulsification time on sodium persulfate oxidative demulsification were analyzed. The oil removal efficiency was as high as 91.28%. The results showed that the sediment was uniformly and finely distributed in the S/D-treated OS. The contact angle of the sediment surface was 40°, and the initial apparent viscosity of the OS was 56 Pa·s. First, the saturated hydrocarbons and aromatic hydrocarbons on the sediment surface were adsorbed by the monolayer adsorption on SL. Stubborn, cohesive oil agglomerates were dissociated. Sulfate radical anion (SO4−·) with a high oxidation potential, was formed from sodium persulfate. The oxidation reaction occurred between SO4−· and polycyclic aromatic hydrocarbons. A good three-phase separation effect was attained. The oil recovery reached 89.65%. This provides theoretical support for the efficient clean separation of oily sludge.Keywords:oily sludge;sodium lignosulfonate;adsorption demulsification;separation;recovery
研究领域:
环境科学
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能源工程
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DOI
PubMed
高影响因子
Nano Energy
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2025
·
IF 17.1
Jiale Deng,Chenglong Liu,Xiaohong Wang,Longzhen Qiu
Moisture electricity generation (MEG) devices based on biomass materials often face limitations in practical applications due to their poor power generation performance. To address this challenge, this study developed a biomass-based MEG device by chitosan and sodium lignosulfonate, significantly improving the energy output of biomass-based moisture generation devices. The MEG device achieves an open-circuit voltage up to 1.4 V and a short-circuit current of approximately 40 μA·cm −2 at a relative humidity of 75 %, enabled by the synergy of multiple mechanisms. Additionally, the device exhibits excellent linear scalability and supports series-parallel configurations, enabling it to power small electronic devices such as calculators and light-emitting diodes, as well as serve as a sensor for respiration detection. This work presents an innovative strategy for utilizing biomaterials in energy generation, offering new opportunities for sustainable development and advancing green energy technologies.
研究领域:
生物材料学
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可持续能源
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DOI
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2024
·Vol. 25
·期 23
·12542
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IF 4.9
Yun Ma,Hui Liu,Liuli Zhu,Yi Xie,Chuanqi Ren,Xiaorong Mo,Xiaoying Liu,Chen Liang,Gang Deng,Shuangquan Yao,Chengrong Qin
The thermal washing of oily sludge using sodium persulfate (SD) assisted by sodium lignosulfonate surfactant has been demonstrated to be an effective method for oily sludge remediation. To further explore the underlying mechanisms of this process, a systematic study was conducted by simulating oily sludge systems consisting of saturated hydrocarbons (SaH), aromatics hydrocarbons (ArH), resins (Res), and asphaltenes (Asp). The effects of reaction conditions, such as pH, sodium lignosulfonate alkyl (LSA) concentration, SD concentration, and washing temperature, were analyzed. Furthermore, the oxidative kinetic mechanism during the reaction process was investigated. The results demonstrated that neither petroleum hydrocarbons nor SD underwent significant chemical transformations when exposed to LSA, while SD exhibited a marked oxidative degradation effect on all four types of hydrocarbons. Oxidation kinetics indicated that sodium hydroxide played a catalytic role, with SD being the main oxidant and particularly efficient in degrading Asp and Res. Meanwhile, LSA contributed to the removal of hydrocarbons by reducing the surface tension of the solution, enhancing solubilization. This study not only elucidates the central role of SD in the thermal washing process but also provides a solid theoretical foundation for the practical application of this technology in oily sludge treatment.
研究领域:
环境科学
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化学工程
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PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Guo-Wen Fang,Zhang-Min Li,Jian-Fei Li,Dan-Dan Cai,Yu-Jie Xiong,Yan Zhou,Wei Hui,Duan-Jian Tao
Lignin is the largest natural reservoir of aromatic compounds while its intricate polymeric structure complicates the reuse of lignin-derived waste. Herein, we report the development of lignin-based NH 3 adsorbents by upcycling sodium lignosulfonate (SLS) from spent paper pulp liquor. The demethylation of SLS was carried out to obtain the demethylated SLS (DSLS) and subsequently the pelletized DSLS@binder adsorbents were prepared using DSLS and three binders. The results indicate that the optimized 95% DSLS@PVA pellets with binder dosage of 5 wt% PVA (polyvinyl alcohol, PVA) exhibit the NH 3 adsorption capacity of 11.5 mmol g −1 , along with remarkable selectivity uptake for NH 3 /N 2 (3573) and NH 3 /CO 2 (1380). Moreover, the 95% DSLS@PVA pellets demonstrate ultra-fast adsorption kinetics (half-capacity uptake time of merely 38 s). Column breakthrough tests showed that the 95% DSLS@PVA pellets achieved NH 3 retention time of 370 min g −1 in a ternary gas mixture of NH 3 /N 2 /CO 2 (1 %/98 %/1%), with a dynamic adsorption capacity of 2.07 mmol g −1 . In addition, the 95% DSLS@PVA has a good balance between mechanical strength and NH 3 uptake cycle performance. This work provides a sustainable strategy for valorizing lignin waste into high-performance NH 3 adsorbents.
研究领域:
材料科学
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环境工程
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DOI
高影响因子
TENSIDE SURFACTANTS DETERGENTS
·
2022
·Vol. 59
·期 3
·221-230
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IF 1.058
Fengli Gong,Hong Xu,Jinxiang Dong
Sodium oxalate (Na 2 C 2 O 4 ) is an excellent phosphorus-free agent, but in sodium oxalate-containing detergents with sodium dodecylbenzene sulfonate (SDBS) and sodium carboxymethyl cellulose (CMC), significant ash deposition occurs on cotton fabrics. SDBS is the main anionic surfactant in modern detergents and cotton fiber is the most commonly used textile fiber. In this study, sodium lignosulfonate (LS) was investigated for its ability to prevent redeposition in SDBS-Na 2 C 2 O 4 -CMC-LS formulations. The effects of LS on ash content, whiteness, optimum washing temperature, calcium oxalate morphology, zeta potential and surface tension were carefully analyzed. The results showed that the addition of LS significantly improved the prevention of ash deposits on cotton fibers. The ash content was less than 0.46% and a small amount of particles were scattered on the cotton fibers. LS showed good dispersibility but had little effect on the washing power and zeta-potential.
研究领域:
材料科学
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纺织工程
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表面化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2024
·
IF 7.7
Hui Wang,Kun Dai,Houle Xiang,Jingwei Kou,Han Guo,Hanjie Ying,Jinglan Wu
Dyes are indispensable for the rapid development of society, but untreated dye wastewater can threaten human health. In this study, an adsorbent (SA/SL/CCS/PEI@MNPs) was synthesized by one-pot method using magnetic nanoparticles (MNPs), sodium alginate (SA), sodium lignosulfonate (SL), carboxylated chitosan (CCS) and polyethyleneimine (PEI). The adsorbent was mesoporous micrometer-sized particles with pore size of 34.92 nm, which was favorable for dynamic column experiments. SA/SL/CCS/PEI@MNPs possessed pH-responsive performance. Under acidic condition, the maximum adsorption capacities for anionic dyes (tartrazine, reactive black-5, indigo carmine) reached >550 mg/g. Under alkaline condition, those for cationic dyes (methylene blue, methyl violet, neutral red) exceeded 1900 mg/g. The function of the various modifiers was investigated. The results indicated that the incorporation of SL, CCS and PEI was able to provide plenty of sulfonate, carboxylate and amino/imine reactive groups so that adsorption capacities of dyes were improved. The adsorption mechanism was explored by FTIR and XPS. At the same time, the adsorption mechanism was more deeply analyzed using molecular dynamics simulations and radial distribution function. It was demonstrated that the dyes adsorption on the SA/SL/CCS/PEI@MNPs was mainly due to electrostatic attraction and π-π interaction. In addition, the adsorbent had good reusability, and the removal still reached over 90 % after five cycles. In conclusion, the adsorbent displayed a broad prospect for the adsorption of organic dyes.
研究领域:
环境科学
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材料科学
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DOI
PubMed
高影响因子
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