Journal of Environmental Chemical Engineering
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2021
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IF 5.909
Evans Dovi,Aaron Albert Aryee,Alexander Nti Kani,Farid Mzee Mpatani,Jianjun Li,Zhaohui Li,Lingbo Qu,Runping Han
Several pollutants found in industrial wastewater , such as Congo red dyes (CR), have been shown to be toxic to organisms. To protect human health and the environment, industrial effluents must be purified before being released into bodies of water. In order to effectively remove CR from the solution, amino functionalized walnut shells (WNS) were synthesized. Batch and fixed-bed column systems were used in this research. The Langmuir isotherm model fits the experimental findings well in these two systems, whereas the pseudo-second-order and Thomas kinetic models characterize batch and column CR adsorption, respectively. The adsorption capacity of ACWNS toward CR was to 224.4 mg g −1 at 303 K from Langmuir model. Electrostatic interactions and hydrogen bonding may be the mechanisms. The column research showed that adsorption was more favorable at low inlet solution concentration, low flow rate, or high column depth. The column mass transfer capacity parameter (B) increased with increasing concentration (0.461, 1.59, and 2.47 for 50, 100, and 150 mg L −1 , respectively) owing to a greater driving force for CR adsorption onto ACWNS, while adsorbate–adsorbent affinity (β) exhibited a reverse trend. The regeneration property of CR-loaded ACWNS was excellent using NaOH solution. The thermodynamic study revealed that CR removal was both spontaneous and endothermic. ACWNS is promising to remove CR from the solution.
研究领域:
环境科学
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化学工程
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高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2021
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IF 3.764
Fujian Li,Junjun Yan,Xiangping Zhang,Na Wang,Haifeng Dong,Lu Bai,Hongshuai Gao
Aluminum, as an associated metal with rare-earth resources, is a common impurity in rare-earth separation products. In the traditional P507-kerosene-HCl system, tremendous aluminum impurity (8875 mg/L herein) is often enriched in GdCl3 solutions because of the similar extraction sequence during rare-earth separation. In this work, a new amine-group-functionalized ionic liquid (IL) was developed to remove trace aluminum impurity from high-purity GdCl3 solutions, overcoming the drawbacks of strong hydrophilicity and complicated compositions of the organic phase, as well as other impurities introduced and tremendous saline wastewater produced inevitably. Methyltrioctylammonium hydroxide (N1888OH), instead of the water soluble ammonium hydroxide (NH4OH), was used to dissociate the dimer of sec-octylphenoxy acetic acid (CA12) and synthesize cation- and anion-bifunctionalized IL [N1888][CA12]. The separation factor of Al/Gd was as high as 36. The influences of pH, salting-out agent, extraction time, temperature, and stripping efficiency on the extraction efficiency were evaluated. The result showed that high-purity GdCl3 solution was obtained with low aluminum impurity of 10 ppm after five-stage countercurrent extraction. Due to the weak interaction between the metal and IL, very dilute HCl solution (0.07 mol/L) and NaOH solution (0.07 mol/L) were in favor of metal stripping and IL regeneration.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
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2021
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IF 3.171
Mengge Shang,Jing Zhang,Jinqiang Sun,Shimo Yu,Feng Hua,Xiaoxu Xuan,Xun Sun,Serguei Filatov,Xibin Yi
A mesoporous UiO-66-NH 2 aerogel is prepared via a straightforward sol–gel method without using any binders or mechanical pressures, in which the amine groups are directly introduced into the matrix by using 2-aminoterephthalic acid. The novel UiO-66-NH 2 aerogel also exhibits high specific surface area and mesopore-dominated structure, implying its highly potential use in CO 2 adsorption. For ulteriorly investigating the effect of amine loading on the CO 2 adsorption ability, a series of UiO-66-NH 2 aerogel with different amino content is fabricated by changing the ligand/metal molar ratio. When the molar ratio is 1.45, the CO 2 adsorption capacity reaches the optimum value of 2.13 mmol·g −1 at 25 °C and 0.1 MPa, which is 12.2% higher than that of pure UiO-66 aerogel. Additionally, UiO-66-NH 2 -1.45 aerogel also has noticeable CO 2 selectivity against N 2 and CH 4 as well as good regeneration stability. Such results imply that it has good application prospect in the field of CO 2 adsorption, and also contains the potential to be applied in catalysis, separation and other fields.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
Polymers
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2023
·Vol. 15
·期 15
·3184
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IF 5
Yuxin Sun,Xiwen Zhang,Dongyu Zhao
The synthesis and characterization of aminopropyl-terminated polydimethylsiloxane- treated carbon nanotube (AFCNT)-reinforced epoxy nanocomposites are reported in the current study. The amine functionalization of the CNTs was performed with a reaction to PDMS-NH2. The AFCNTs were homogeneously dispersed in epoxy resin by using an emulsifier and a three-roller mill. The AFCNTs were characterized using Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The curing behavior of the epoxy/AFCNT was studied using a differential scanning calorimeter (DSC). The tensile and impact strengths of the 2.0 wt.% AFCNT-reinforced epoxy nanocomposite were enhanced by 43.2% and 370%, respectively. Moreover, the glass transition temperature (Tg) was also enhanced by 21 °C. Furthermore, significant enhancements were observed in the initial degradation and char yield values. SEM results confirmed that the AFCNTs were highly dispersed in the polymeric matrix.Keywords:amine functionalization;carbon nanotubes;nanocomposites;mechanical properties
研究领域:
材料科学
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化学工程
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DOI
PubMed
高影响因子
ANALYTICAL CHEMISTRY
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2022
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IF 8.008
Jiali Liu,Xianbiao Wang,Yangyang Zhao,Yongfei Xu,Yang Pan,Shaojie Feng,Jin Liu,Xianhuai Huang,Huanting Wang
Radioactive U(VI) in nuclear wastewater is a global environmental pollutant that poses a great threat to human health. Therefore, it is of great significance to develop a U(VI) sensor with desirable sensitivity and selectivity. Inspired by electron-donating group modification for enhancement of binding affinity toward U(VI), we report an amine group functionalization of UiO-66-NH2, using a low-cost, environmentally friendly, and low-temperature NH3 plasma technique as a fluorescence switching nanoprobe for highly sensitive and selective detection of U(VI). The resulting amine-functionalized UiO-66-NH2 (LTP@UiO-66-NH2) shows dramatically enhanced fluorescence emission and selective sensitivity for U(VI) on the basis of the quenching effect. The quenching efficiency increases from 58 to 80% with the same U(VI) concentration (17.63 μM) after NH3 plasma functionalization. As a result, the LTP@UiO-66-NH2 has the best Ksv (1.81 × 105 M–1, 298 K) and among the lowest LODs (0.08 μM, 19.04 ppb) compared with those reported in the literature. Intraday and interday precision and application in real environment experiments indicate stable and accurate U(VI) detection performance. Fluorescence lifetime and temperature-dependent detection experiments reveal that the quenching mechanism belongs to the static quenching interaction. The highly selective fluorescence detection is attributed to the selective binding of U(VI) by the rich functionalized amine groups of LTP@UiO-66-NH2. This work provides an efficient fluorescence probe for highly sensitive U(VI) detection in water, and a new strategy of tailored plasma functionalization for developing a practical MOF sensor platform for enhanced fluorescence emission, sensitivity, and selectivity for detecting trace amounts of radioactive species in the environment.
研究领域:
环境科学
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材料科学
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放射化学
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2022
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IF 16.744
Shihai Cao,Hao Liu,Zhenhe Jia,Meng Guo,Wentong Gao,Zhaohan Ding,Weijie Yang,Liang Chen,Wenjing Wang
CO 2 photoreduction by carbon nitride (CN) is an appealing idea, but its current efficiency remains daunting for practical viability. The amine-functionalized CN with controllable adsorption groups was prepared by carboxylation and acylation reactions. The carboxylation and amine-functionalization process preserved the crystalline structure of CN but exfoliated bulk CN to thin layers avoiding its agglomeration. With the successful graft of EDA, the amounts of –NH 2 groups for 24-CN-EDA increased remarkably compared with bulk CN. EDA-functionalization benefited CO 2 reduction activity of CN with varying amounts of amino groups. The CO yield of 24-CN-EDA was 5.92 folds to bulk CN. The enhancement was mainly triggered by the enlarged CO 2 adsorption capacity and reduced charge transfer resistance, rather than band structure and light absorption. Moreover, DFT calculations suggest that the graft of EDA on CN nanosheets possesses reduced energy barrier for CO 2 reduction into CO via enhancing CO* desorption and CO formation.
研究领域:
材料科学
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环境科学
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化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Guoyang Xu,Jing Lin,Xiangqian Gao,Chao Yu,Chengchun Tang,Yang Huang
Development of effective iodine capture materials and techniques is crucial for addressing the diverse applications of iodine and its significance in various contexts, including nuclear pollution control. This study presents the creation of a new 3-Aminopropyltriethoxysilane (APTES)-modified boron nitride (BN) aerogel designed for effective iodine capture. The internal structural units of BN aerogel , specifically the one-dimensional BN fibers, have been successfully functionalized with amine groups, resulting in the formation of an amine-rich SiO x capping layer on the surface of these fibers. The APTES modification not only establishes a stable connection within the internal BN fibers network but also imparts the material with a significant number of iodine capture sites. The resulting aerogel demonstrates an impressive iodine vapor capture capacity of 313.64 wt% at 350 K and atmospheric pressure, and up to 1028.96 mg/g in iodine/n-hexane solution, surpassing the capabilities of pure BN aerogel and most existing iodine capture materials. The excellent iodine capture performance of APTES-modified BN aerogel suggests its promising potential for future applications in iodine capture.
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
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2020
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IF 3.99
Yanjun Ren,Yufen Zhai,Liansong Wu,Wenjing Zhou,Haihang Qin,Pingquan Wang
Shale hydration is the main cause of wellbore instability during drilling using water-based drilling fluids (WBD). In this work, NH 2 - and HO-functionalized ionic liquids (ILs) were investigated for their performances on inhibiting the shale hydration, as well as their influences on the properties of WBD, using immersion and sedimentation tests, linear swelling test, hot-rolling dispersion test, rheological and filtration experiments. The mechanisms were identified by X-ray diffraction (XRD), zeta-potential and particle size distribution analyses, scanning electron microscopy (SEM) and related theoretical analysis. Evaluation experiment results showed that the NH 2 -functionalized IL had the best inhibition performance, followed by poly(propylene glycol)bis(2-aminopropyl ether), HO-functionalized IL and KCl. NH 2 -functionality was more favorable to shale inhibition than HO-functionality. When used in WBD, ILs could prevent viscosity building-up at high temperature, but cause filtration and inhibition failure, which could be mitigated when polyanionic cellulose (PAC) was added in WBD prior to inhibitors. Three critical observations helped elucidate the inhibitive mechanisms: the intercalation of cationic groups of ILs into the clay interlayers, the decrease of both interlayer spacing and double layer thickness. The NH 2 -functionalized IL allowed the smallest interlayer spacing and double layer thickness and therefore performed best in inhibition. The inhibition failure in WBD with ILs depended on two aspects: the consumption of ILs untimely and the filtration failure of WBD. PAC could decrease both of ILs’ loss within WBD and water loss toward shale, mitigating the WBD’s inhibition failure. Our work will facilitate the rational design of efficient and environmentally acceptable inhibitors and their rational applications in WBD for drilling shale formation.
研究领域:
石油工程
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化学工程
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高影响因子
ACS Omega
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2018
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IF 0
Jisuan Tan,Yiheng Song,Xiaohua Huang,Li Zhou
The development of low-cost adsorbent with excellent adsorption property remains a big challenge. Herein, the functionalization of natural peach gum polysaccharide (PGP) with multiple amine groups for the removal of toxic Cr(VI) ions from water was studied. The obtained PGP-NH2 gel exhibited high-removal efficiency (>99.5%) toward Cr(VI) ions, especially with relatively low initial concentration of Cr(VI) ions (≤250 mg/L). The influences of pH, ionic strength, contact time, initial concentration, and temperature on the adsorption of Cr(VI) ions were systematically investigated. The PGP-NH2 gel showed rapid adsorption rate and could reach adsorption equilibrium within about 40 min. The Cr(VI) ion uptake process could be described by pseudo-second-order kinetic and Langmuir isotherm models. The maximum adsorption capacity of PGP-NH2 gel could reach 188.32 mg/g. Thermodynamic investigation results indicated the spontaneous and exothermic characteristic of the uptake process. Moreover, the PGP-NH2 gel also exhibited favorable reusability, and 135.52 mg/g of adsorption capacity was retained even after being reused for five times. Considering its low cost and superior uptake property, the PGP-NH2 gel holds a great promise for employing as an adsorbent to treat Cr(VI) ion-containing wastewater.
研究领域:
环境科学
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材料科学
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化学工程
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DOI
PubMed
SEPARATION AND PURIFICATION TECHNOLOGY
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2017
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IF 3.359
Yan He,Qinqin Liu,Jun Hu,Chengxi Zhao,Changjun Peng,Qiang Yang,Hualin Wang,Honglai Liu
Porous organic polymers (POPs), a new class of porous materials constructed by organic molecular building blocks, have attracted much attention. To design POPs with both good porosity and specific-task functionalization is still a critical challenge. In this work, using a simple Friedel-Crafts one-step reaction, one of the most common organic compound methylbenzene monomers were polymerized through the cross-linker formaldehyde dimethyl acetal (FDA) to produce a cost-effective non-functionalized porous polymer (POP-CH 3 ). Moreover, amine groups were further incorporated into the network by the post-synthetic modification method. The resulted porous polymer POP-NH 2 presented highly effective in removing Pb(II) from aqueous solution. The maximum Pb(II) adsorption capacity, q max , evaluated from the Langmuir model was 523.6 mg g −1 . The combination of FT-IR experimental results and the theoretical quantum calculations illustrated that the amine groups ( NH 2 ) can easily form coordination complexes with Pb(II), which were responsible for efficient adsorption. The generated POP-NH 2 could be regenerated effectively and recycled at least four times without significant loss of adsorption efficiency. Hence, the outstanding Pb(II) adsorption capacity, excellent reusability as well as low cost of synthesis create potential polymer POP-NH 2 to be an attractive adsorbent for removing toxic metal ions from aqueous solution.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
CERAMICS INTERNATIONAL
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2024
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IF 5.1
Sheng Xu,Jingrou Huang,Xiaozhu Wei,Yilan Chen,Minyi Liu,Junjie Wu,Yamin Liu
Micro-mesoporous silicon materials were prepared using silicate filtrate produced from fly ash as a silicon source. Then, the micro-mesoporous silica material was used as the carrier and amine compounds as modifiers to prepare a micro-mesoporous CO 2 adsorbent. Afterwards, the structural properties, surface groups, thermal stability of micro-mesoporous silicon materials and micro-mesoporous CO 2 adsorbent were studied. The results reveal that the micro-mesoporous CO 2 adsorbent maintains the same micro-mesoporous structure as the micro-mesoporous silica material. And the thermal stability temperatures of adsorbent is below 383 K. Later, the CO 2 adsorption performance and kinetic characteristics of adsorption process were studied through thermogravimetric analysis (TGA) and adsorption column experiments. The results indicated that the optimal CO 2 adsorption capacity of 2.31 mmol/g-adsorbent was achieved at 343 K, and the adsorption capacity remained basically unchanged after 10 adsorption/desorption cycles. Dynamics studies have shown that the Avrami fraction model fits the CO 2 isothermal adsorption curve very well, and the fitting results reveal that the intra-particle diffusion dominates the speed of the adsorption process. Additionally, the Yasyerli deactivation model can perfectly fit the CO 2 adsorption breakthrough curve, and the fitting results indicate that the CO 2 adsorption process is the deactivation process of the adsorbent. Finally, the adsorption/desorption kinetic simulation parameters can be used for the design and optimization of CO 2 adsorption and desorption processes in industry.
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
CHEMICAL ENGINEERING JOURNAL
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2025
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IF 13.2
Min Zhang,Jieshu Zhou,Xiulan Guo,Xiangke Zeng,Lan Shi,Tingting Zhang,Yunfei He,Xintao Zhou,Shaoyun Shan,Kaili Yao
Mitigating the rise of atmospheric carbon dioxide (CO 2 ) levels presents one of humanity’s significant challenges. Metal-organic frameworks (MOFs) have emerged as promising materials for CO 2 capture, owing to their unique chemical structure and operability. Many researchers have demonstrated that amination treatment can further enhance CO 2 adsorption performance. However, the relatively low capture efficiency and limited cycling stability of these materials continue to impede their development. Alkali metal cations exhibit high CO 2 adsorption capacities and can be incorporated into the MOF structure to significantly enhance CO 2 capture capacity and cycling stability. Therefore, we synthesized novel alkali metal ion-doped M−NH 2 −MIL−101 (M = Li, Na, K) adsorbents using a post-modification method, successfully anchoring alkali metal cations to carboxylate group sites within the MOFs framework. The integration of microscopy, spectroscopy, and density functional theory (DFT) calculations has confirmed that the introduction of alkali-metal cations enhances the adsorption between MOFs and CO 2 , thereby providing stronger adsorption sites. Experimental studies have demonstrated that doping with 0.1 M K + (denoted as 0.1 K-NH 2 -MIL-101) exhibits a higher CO 2 adsorption capacity (8.2mmol g −1 ) at 298 K, approximately 3.2 times greater than that of NH 2 -MIL-101. Furthermore, it maintains an adsorption capacity of 7.4mmol g −1 after the sixth adsorption–desorption test, indicating excellent cyclic stability. Additionally, 0.1 K-NH 2 -MIL-101 was employed for in situ capture and electrocatalytic CO 2 reduction. By integrating 0.1 K-NH 2 -MIL-101 with a Bi-based catalyst to enhance the local CO 2 concentration, the Faraday efficiency for the formic acid product was effectively increased from 67 % to 85 %.
研究领域:
材料科学
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环境科学
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化学工程
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DOI
高影响因子
危险品化学品经营许可证（带存储）