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LDL adsorbent with dendrimer PAMAM as spacer

YUAN Yi, WANG Yanming, YU Yaoting

《化学科学与工程前沿（英文）》 2008年 第2卷 第4期   页码 434-438 doi: 10.1007/s11705-008-0084-2

摘要： Dendritic polymers are three-dimensional, highly ordered compounds formed by reiterative reaction sequences, and via discrete stages referred to as generations. To study the spacer effect of low density lipoprotein (LDL) adsorbent, we linked dendrimer polyamidoamine (PAMAM) generation 1 (G1), generation 3 (G3) and generation 5 (G5) to cellulose beads, respectively, and then determined the adsorption proportion of the adsorbents with PAMAM decorated with taurine. The result shows that the spacer with activated multi-points could efficiently improve the adsorption capacity of the adsorbent.

关键词： adsorption proportion     adsorbent     dendrimer polyamidoamine     reiterative     generation    

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新型细水雾添加剂成分对灭火性能影响研究

纪欢乐,张青松,吴斌斌,梁天水

《中国工程科学》 2012年 第14卷 第11期   页码 82-87

摘要：

为研究自制细水雾添加剂中主要成分对灭火性能的影响，在开放空间，进行了不同工作压力、不同浓度、不同燃料条件下含添加剂细水雾的灭火研究，实验获取了灭火时间、火焰形态、火焰温度等灭火参数。通过对柴油和汽油两种不同燃料的灭火实验发现，使用含添加剂的细水雾对低沸点、高蒸发速率的汽油灭火效果同样较好。根据加入不同浓度的氟表面活性剂的实验结果比照发现，氟表面活性剂是自制添加剂中起到主要提升灭火性能作用的物质，它通过改变细水雾物理性质使加入自制添加剂的细水雾的灭火性能显著提高。对比调整自制添加剂各物质含量的实验数据，进一步确定添加剂各成分最佳灭火性能浓度。

关键词： 细水雾添加剂     灭火性能     添加剂成分     灭火机理    

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三维GIS中地层多比例尖灭自动建模技术

董志

《中国工程科学》 2010年 第12卷 第2期   页码 76-82

摘要：

利用地质勘察数据导入到三维系统中，运用各种三维空间构模方法，自动进行地层推理与连接，生成三维地层模型。以多数据源自动生成模型，可以方便地使地学领域中的地质工作者从繁重的地质信息获取和地质解释手工劳动中解放出来，提高了三维地层建模的速度和构建质量。

关键词： 地质三维模型     虚拟钻孔     多比例尖灭     自动建模     三角形自分解    

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Contributions of adsorption, bioreduction and desorption to uranium immobilization by extracellular polymeric

《环境科学与工程前沿（英文）》 2023年 第17卷 第9期 doi: 10.1007/s11783-023-1707-z

摘要：

● EPS immobilizes U(VI) via adsorption, bioreduction and desorption.

关键词： Adsorption     Bioreduction     Desorption     Kinetics     Isotherm     Uranium    

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Polypropylene microplastics alter the cadmium adsorption capacity on different soil solid fractions

《环境科学与工程前沿（英文）》 2022年 第16卷 第1期   页码 3-3 doi: 10.1007/s11783-021-1437-z

摘要：

Microplastics (MPs) are widely present in a variety of environmental media and have attracted more and more attention worldwide. However, the effect of MPs on the interaction between heavy metals and soil, especially in soil solid fraction level, is not well understood. In this study, batch experiments were performed to investigate the adsorption characteristics of Cd in bulk soil and three soil solid fractions (i.e. particulate organo matter (POM), organic-mineral compounds (OMC), and mineral) with or without polypropylene (PP) MPs.

关键词： Polypropylene microplastics     Cadmium     Adsorption     POM     OMC     Mineral    

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Cesium removal from radioactive wastewater by adsorption and membrane technology

《环境科学与工程前沿（英文）》 2023年 第18卷 第3期 doi: 10.1007/s11783-024-1798-1

摘要：

● Removal of cesium from radioactive wastewater is still a challenging.

关键词： Cesium     Adsorption     Membrane separation     Advanced liquid processing system     Fukushima nuclear accident    

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Dual-functional sites for synergistic adsorption of Cr(VI) and Sb(V) by polyaniline-TiO hydrate: Adsorption

《环境科学与工程前沿（英文）》 2022年 第16卷 第8期 doi: 10.1007/s11783-022-1526-7

摘要：

• PANI/Ti(OH)n(4–n)+ exhibited excellent adsorption capacity and reusability.

关键词： Polyaniline/TiO2     Chromium     Antimony     Adsorption     Desorption     Mechanism    

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富水砂卵石地层盾构隧道施工泥浆的研究与应用

邓亨义,徐雪莹,陈明娟

《中国工程科学》 2010年 第12卷 第12期   页码 79-82

摘要：

针对北京站至北京西站地下直径线工程泥水盾构施工，通过对泥浆性能研制的配比试验，提出了砂卵石条件下的最佳泥浆配比，提高并改善了泥浆的成形质量与速度，确保了环境要求。对类似工程有一定的借鉴作用。

关键词： 泥水盾构     砂卵石地层     泥浆配合比    

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Kinetics and thermodynamics of the phosphine adsorption on the modified activated carbon

Bingnan REN

《化学科学与工程前沿（英文）》 2011年 第5卷 第2期   页码 203-208 doi: 10.1007/s11705-010-0571-0

摘要： The kinetics and the thermodynamics of phosphine (PH ) adsorption on the modified activated carbon have been explained for the adsorption process of PH . This study investigated the kinetic and thermodynamic properties of PH adsorption on the activated carbon impregnated with 5% HCl solution. The thermodynamic properties including PH adsorption isotherm and adsorption heat were separately investigated at 20°C, 70°C, 90°C. The results showed that the Freundlich-type isotherm equation described the isotherms well. The adsorption capacity increased with increasing temperature between 20°C and 70°C. Between 70°C and 90°C, the adsorption capacity decreased obviously with increasing temperature. The adsorption capacity reached the maximum at 70°C. By analyzing the results of the kinetics and the thermodynamics, we found that the adsorption of PH was dominated by physical adsorption at the lower temperature (20°C). Then with increasing temperature, chemical adsorption gradually dominated in the adsorption process. The adsorption capacity decreased at above 70°C is due to the exothermic effects in the process of adsorption.

关键词： adsorption     PH3     activated carbon     kinetics     thermodynamics    

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An adsorption study of

Lingxiao FU, Jianhua ZU, Enxi GU, Huan WANG, Linfeng HE

《能源前沿（英文）》 2020年 第14卷 第1期   页码 11-17 doi: 10.1007/s11708-019-0634-y

摘要： Nanoscale zero-valent iron (nZVI) supported on D001 resin (D001-nZVI) was synthesized for adsorption of high solubility and mobility radionuclide Tc. Re(VII), a chemical substitute for Tc, was utilized in batch experiments to investigate the feasibility and adsorption mechanism toward Tc(VII). Factors (pH, resin dose) affecting Re(VII) adsorption were studied. The high adsorption efficiency of Re(VII) at pH= 3 and the solid-liquid ratio of 20 g/L. X-ray diffraction patterns revealed the reduction of into ReO immobilized in D001-nZVI. Based on the optimum conditions of Re(VII) adsorption, the removal experiments of Tc(VII) were conducted where the adsorption efficiency of Tc(VII) can reach 94%. Column experiments showed that the Thomas model gave a good fit to the adsorption process of Re(VII) and the maximum dynamic adsorption capacity was 0.2910 mg/g.

关键词： technetium     nanoscale zero-valent iron (nZVI)     D001 resin     adsorption    

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Dialdehyde cellulose nanocrystal cross-linked chitosan foam with high adsorption capacity for removal

《化学科学与工程前沿（英文）》 2023年 第17卷 第7期   页码 853-866 doi: 10.1007/s11705-022-2256-x

摘要： The discharge of large amounts of dye-containing wastewater seriously threats the environment. Adsorbents have been adopted to remove these dyes present in the wastewater. However, the high adsorption capacity, predominant pH-responsibility, and excellent recyclability are three challenges to the development of efficient adsorbents. The poly(acryloxyethyl trimethylammonium chloride)-graft-dialdehyde cellulose nanocrystals were synthesized in our work. Subsequently, the cationic dialdehyde cellulose nanocrystal cross-linked chitosan nanocomposite foam was fabricated via freeze-drying of the hydrogel. Under the optimal ratio of the cationic dialdehyde cellulose nanocrystal/chitosan (w/w) of 12/100, the resultant foam (Foam-12) possesses excellent absorption properties, such as high porosity, high content of active sites, strong acid resistance, and high amorphous region. Then, Foam-12 was applied as an eco-friendly adsorbent to remove acid red 134 (a representative of anionic dyes) from aqueous solutions. The maximum dye adsorption capacity of 1238.1 mg∙g‒1 is achieved under the conditions of 20 mg∙L‒1 adsorbents, 100 mg∙L‒1 dye, pH 3.5, 24 h, and 25 °C. The dominant adsorption mechanism for the anionic dye adsorption is electrostatic attraction, and Foam-12 can effectively adsorb acid red 134 at pH 2.5–5.5 and be desorbed at pH 8. Its easy recovery and good reusability are verified by the repeated acid adsorption–alkaline desorption experiments.

关键词： chitosan foam     cellulose nanocrystals     acid red 134     adsorption    

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Effect of gastric fluid on adsorption and desorption of endocrine disrupting chemicals on microplastics

《环境科学与工程前沿（英文）》 2022年 第16卷 第8期 doi: 10.1007/s11783-022-1525-8

摘要：

• Effect of gastric fluid on EDCs adsorption-desorption to microplastics was evaluated.

关键词： Microplastics     Gastric fluid     Endocrine-disrupting chemicals     Adsorption     Desorption    

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Ammonia adsorption on graphene and graphene oxide: a first-principles study

Yue PENG, Junhua LI

《环境科学与工程前沿（英文）》 2013年 第7卷 第3期   页码 403-411 doi: 10.1007/s11783-013-0491-6

摘要： Motivated by the recent realization of graphene sensor to detect gas molecules that are harmful to the environment, the ammonia adsorption on graphene or graphene oxide (GO) was investigated using first-principles calculation. The optimal adsorption and orientation of the NH molecules on the graphene surfaces were determined, and the adsorption energies ( ) as well as the Mulliken charge transfers of NH were calculated. The for the graphene are small and seem to be independent of the sites and orientations. The surface epoxy or hydroxyl groups can promote the adsorption of NH on the GO; the enhancement of the for the hydroxyl groups is greater than that for the epoxy groups on the surface. The charge transfers from the molecule to the surfaces also exhibit the same trend. The Br?nsted acid sites and Lewis acid sites could stably exist on the GO with surface hydroxyl groups and on the basal, respectively.

关键词： graphene oxide     first-principles calculations     NH3 adsorption    

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Fabrication of coconut shell-derived porous carbons for CO adsorption application

《化学科学与工程前沿（英文）》 2023年 第17卷 第8期   页码 1122-1130 doi: 10.1007/s11705-022-2292-6

摘要： Biomass-derived porous carbons have been considered as the most potential candidate for effective CO2 adsorbent thanks to being widely-available precursor and having highly porous structure and stable chemical/physical features. However, the biomass-derived porous carbons still suffer from the poor optimization process in terms of the synthesis conditions. Herein, we have successfully fabricated coconut shell-derived porous carbon by a simple one-step synthesis process. The as-prepared carbon exhibits advanced textual activity together with well-designed micropore morphology and possesses oxygen-containing functional groups (reached 18.81 wt %) within the carbon matrix. Depending on the different activating temperatures (from 700 to 800 °C) and KOH/biomass mass ratios (from 0.3 to 1), the 750 °C and 0.5 mass ratio were found to be enabling the highest CO2 capture performance. The optimal adsorbent was achieved a high CO2 uptake capacity of 5.92 and 4.15 mmol·g−1 at 0 and 25 °C (1 bar), respectively. More importantly, as-prepared carbon adsorbent exhibited moderate isosteric heat of adsorption and high CO2/N2 selectivity. The results were revealed not only the textural feature but also the surface functional groups critically determine the CO2 capture performance, indicating coconut shell-derived porous carbon has a considerable potential as a solid-state adsorbent for the CO2 capture.

关键词： porous carbons     CO2 adsorption     KOH activation     single step reaction     biomass    

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Reactive adsorption desulfurization over a Ni/ZnO adsorbent prepared by homogeneous precipitation

Aihua KONG, Yanyu WEI, Yonghong LI

《化学科学与工程前沿（英文）》 2013年 第7卷 第2期   页码 170-176 doi: 10.1007/s11705-013-1322-9

摘要： A high-performance Ni/ZnO adsorbent was prepared by homogeneous precipitation using urea hydrolysis and characterized by N adsorption-desorption, X-ray diffraction (XRD), and scanning electron microscope (SEM). The adsorbent was applied to the deep desulfurization of gasoline and showed a high breakthrough sulfur capacity and a remarkably high volume hourly space velocity. The effects of coexisting olefins in gasoline as well as adsorptive conditions on the adsorptive performance were examined. It was found that olefins in gasoline had a slightly inhibiting effect on the desulfurization performance of the adsorbent. The optimum conditions were 673 K, 1.0 Mpa with a volume hourly space velocity of 60 h . Under the optimum conditions, ultralow sulfur gasoline could be produced and the breakthrough sulfur capacity of the adsorbent was 360 mg-s/g-sorb for the model gasoline.

关键词： nickel     reactive adsorption     desulfurization     thiophene    

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标题 作者 时间 类型 操作

LDL adsorbent with dendrimer PAMAM as spacer

YUAN Yi, WANG Yanming, YU Yaoting

期刊论文

新型细水雾添加剂成分对灭火性能影响研究

纪欢乐,张青松,吴斌斌,梁天水

期刊论文

三维GIS中地层多比例尖灭自动建模技术

董志

期刊论文

Contributions of adsorption, bioreduction and desorption to uranium immobilization by extracellular polymeric

期刊论文

Polypropylene microplastics alter the cadmium adsorption capacity on different soil solid fractions

期刊论文

Cesium removal from radioactive wastewater by adsorption and membrane technology

期刊论文

Dual-functional sites for synergistic adsorption of Cr(VI) and Sb(V) by polyaniline-TiO hydrate: Adsorption

期刊论文

富水砂卵石地层盾构隧道施工泥浆的研究与应用

邓亨义,徐雪莹,陈明娟

期刊论文

Kinetics and thermodynamics of the phosphine adsorption on the modified activated carbon

Bingnan REN

期刊论文

An adsorption study of

Lingxiao FU, Jianhua ZU, Enxi GU, Huan WANG, Linfeng HE

期刊论文

Dialdehyde cellulose nanocrystal cross-linked chitosan foam with high adsorption capacity for removal

期刊论文

Effect of gastric fluid on adsorption and desorption of endocrine disrupting chemicals on microplastics

期刊论文

Ammonia adsorption on graphene and graphene oxide: a first-principles study

Yue PENG, Junhua LI

期刊论文

Fabrication of coconut shell-derived porous carbons for CO adsorption application

期刊论文

Reactive adsorption desulfurization over a Ni/ZnO adsorbent prepared by homogeneous precipitation

Aihua KONG, Yanyu WEI, Yonghong LI

期刊论文