ACS Sustainable Chemistry & Engineering
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2025
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IF 7.3
Shu Zhao,Yiran Zhang,Yirui Ning,Linjia Li,Junfeng Lu,Xiaochao Wang,Fudong Wang,Zhidong Wei,Zhen Huang,He Lin
High energy consumption during regeneration is an important challenge of direct air capture (DAC) technology. Direct Joule heating regeneration is an advanced DAC regeneration technology with a simple system, generating heat inside the material for rapid heating, and supports the use of renewable energy by automated control. We developed a self-conductive amine-functionalized adsorbent that converts renewable electricity into heat, and studied the effects of conductive agent content, amine type, and pore structure. The adsorbent can achieve Joule heating with minimal mass fraction of electrically conductive component, resulting in a high specific capacity and avoiding significant sensible heat consumption, thus leading to low regeneration energy requirements. The Ad-0.48PE/0.32HP/0.20CB adsorbent achieved 2.4 mmol/g CO2 capacity, 120 s desorption time, and 3.5–3.7 GJ/tonne CO2 energy consumption. We built a prototype machine, confirming that the material can achieve rapid regeneration and multiple cycles entirely powered by photovoltaic electricity. Our findings highlight the potential of conductive amine-functionalized adsorbents for DAC technology.
研究领域:
环境工程
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能源技术
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材料科学
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化学工程
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可再生能源系统
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产品关联
DOI
高影响因子
Metals
·
2021
·Vol. 11
·期 2
·294
·
IF 2.351
Chunlin He,Khalid A.M. Salih,Yuezhou Wei,Hamed Mira,Adel A.-H. Abdel-Rahman,Khalid Z. Elwakeel,Mohammed F. Hamza,Eric Guibal
With the target of recovering rare earth elements (REEs) from acidic leachates, a new functionalized hydrogel was designed, based on the phosphorylation of algal/polyethyleneimine beads. The functionalization strongly increased the sorption efficiency of the raw material for Pr(III) and Tm(III). Diverse techniques were used for characterizing this new material and correlating the sorption performances and mechanisms to the physicochemical structure of the sorbent. First, the work characterized the sorption properties from synthetic solutions with the usual procedures (study of pH effect, uptake kinetics, sorption isotherms, metal desorption and sorbent recycling, and selectivity from multi-element solutions). Optimum pH was found close to 5; sorption isotherms were fitted by the Langmuir equation (maximum sorption capacities close to 2.14 mmol Pr g−1and 1.57 mmol Tm g−1). Fast uptake kinetics were modeled by the pseudo-second order rate equation. The sorbent was highly selective for REEs against alkali-earth and base metals. The sorbent was remarkably stable for sorption and desorption operation (using 0.2 M HCl/0.5 M CaCl2solutions). The sorbent was successfully applied to the leachates of Egyptian ore (pug leaching) after a series of pre-treatments (precipitation steps), sorption, and elution. The selective precipitation of REEs using oxalic acid allows for the recovery of a pure REE precipitate.Keywords:rare earth elements;sorption isotherms;uptake kinetics;functionalization of bio-based sorbent;metal desorption;sorbent recycling;treatment of ore leachate
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
ACS Omega
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2020
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IF 2.87
Jiamin Yu,Yan Kang,Wenjun Yin,Jinlin Fan,Zizhang Guo
Antibiotic pollution in water is an urgent environmental problem. A novel carbon adsorbent derived from powdery puffed waterfowl feather (PPWF)-doped Phragmites australis (PA) was proposed for enhancing the removal of antibiotics from water in this study. Amoxicillin (AMX) and cephalexin (CEX) were selected as typical antibiotics. PPWF-doped (FPAC) and -undoped (PAC) carbon adsorbents were developed to test the adsorption capacities and mechanisms of AMX and CEX. Characterization techniques such as N2 adsorption/desorption, Fourier transform infrared, X-ray diffraction, scanning electron microscopy, elemental analysis, and Boehm titration were used to determine the properties of adsorbents. Results showed that more microporous structure and surface functional groups are exhibited in FPAC compared to PAC. The nitrogen-containing functional groups were introduced in FPAC. Adsorption capacities at different contact times, pH, and initial concentration were investigated by batch experiments. The AMX and CEX maximum adsorption capacities of FPAC are 25.2 and 30.1% higher than those of PAC, respectively. The kinetic data were well represented by the pseudo-second-order model for AMX and CEX adsorption. The equilibrium data agreed well with the Langmuir model for AMX adsorption and the Freundlich model for CEX adsorption. The adsorption mechanism of AMX and CEX was chemisorption, such as electrostatic attraction and covalent bonding.
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
ENVIRONMENTAL ENGINEERING SCIENCE
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2025
·
IF 1.8
Jiahao Liu,Jun Zhang,Na Li
An environmentally friendly aerogel (CE/LN), composed of cellulose (CE) and lignin (LN) was synthesized via one-pot cross-linking method at room temperature, followed by freeze-drying. The CE/LN aerogel exhibited good mechanical properties and abundant functional groups, making it an effective adsorbent for the adsorption and removal of the antibiotic trimethoprim (TMP) from water. This study systematically investigated the effects of solution pH, aerogel dose, contact time, initial TMP concentration, temperature, ionic strength, and various water sources on TMP adsorption. The CE/LN aerogel demonstrated a higher TMP adsorption capacity of TMP than the CE aerogel across the entire pH range of 2.0–10.0. The adsorption process was well described by the Langmuir isotherm model and pseudo-second-order kinetic model. The CE/LN 6% aerogel achieved the highest adsorption capacity, with a theoretically maximal TMP uptake of 0.402 mmol/g at pH 6.0. However, high concentration of NaCl significantly reduced TMP uptake on the CE/LN 6% aerogel due to the electrostatic shielding effect. After five cycles of adsorption, the CE/LN 6% aerogel maintained a high adsorption capacity, retaining 80% of its initial uptake. Combined with the adsorption performance, the Fourier transform infrared spectrometry and X-ray photoelectron spectroscopy analyses spectroscopy analysis before and after TMP adsorption, it can be concluded that the adsorption mechanism involved hydrogen bonding, electrostatic interactions, and π–π electron donor–acceptor interactions. Thus, the CE/LN aerogel, with its simple preparation method, good adsorption capacity, and reusability, shows great potential for widespread application in the removal of antibiotics from water.
研究领域:
环境科学
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材料科学
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水处理技术
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING RESEARCH & DESIGN
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2024
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IF 3.7
Yan Li,Sisi Tang,Hang Lei,Yuxia Zhong,Yue-Fei Zhang
In this paper, two adsorbents based on hydrophilic and hydrophobic fumed silica carriers for efficient recovery of palladium were prepared using 1,4,7,10-tetraazacyclododecane as a functional group. These functional adsorbents were characterized by FT-IR, SEM and BET. The effects of pH (2-6), contact time (1-480 min), and temperature (25-55℃) on the adsorption performance were investigated. The concentration of palladium(II) after adsorption was determined by flame atomic absorption spectrometry and the data were analyzed by kinetic, thermodynamic and isotherm fitting. At pH = 4, the adsorption conformed to Pseudo-second-order kinetic model, with rapid adsorption within 2 h and able to reach equilibrium within 5 h. Meanwhile, the Langmuir model was able to better describe the isotherm data, with the maximum adsorption exceeding 140 mg·g -1 . Moreover, the thermodynamic analysis indicated that the adsorption was a heat-absorbing spontaneous process. The combination of XPS and DFT calculations elucidated the adsorption and desorption mechanisms, emphasized the potential of these adsorbents for the recovery of Pd(II) from aqueous solutions, and contributed to the development of sustainable and effective adsorption technologies.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2025
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IF 7.8
Bing Wang,Wei Ma,Yuan Chen,Yujia Gao,Guojun Hu,Guochuan Luo
Drilling solid waste (DSW) is a typical byproduct of drilling operations in oil and gas fields. The characteristics of DSW are influenced by both the background soil properties and any added additives. Heavy metal (HM) contamination, particularly cadmium (Cd 2 + ), poses a significant environmental challenge due to its toxicity to nearly all living organisms, including plants. DSW samples from the Tarim Oilfield, Xinjiang, China, were analyzed for HM content and its form distribution. The total Cd content was 48 mg/kg, with 41.1 % as unstable HM and 58.9 % as stable HM, exceeding the standard (DB 65/T 3997–2017). Conventional methods for remediating HM-contaminated soil, such as chemical washing and adsorption, are commonly used. X-ray diffraction (XRD) analysis revealed that the DSW has a crystalline carbonate structure, which is disrupted when treated with strong acids. Thus, in this study, a modified self-floating magnetic hollow glass microsphere (FHGM) was employed to remediate HM-contaminated DSW without the use of acidic washing agents. FHGM has a hollow structure, floats within 30 s, and possesses a saturation magnetization near 9, allowing for effective self-flotation and magnetic response, which facilitate its separation from the DSW. The results show that when the solution pH was 8, contact time was 240 min, the dosage of Fe 3 O 4 was 0.6 g and the proportion of heavy metals to FHGM= 100:1, the removal efficiency of Cd from DSW using FHGM reached 78.8 %. Notably, the removal rate of HMs from the FeMn and OM fractions was high, indicating that FHGM enhances the migration of stable HMs. Furthermore, using centrifugal force at 17,232 x g, Cd and FHGM were effectively separated, with the material being recycled up to five times, FHGM still retain approximately 73.2 % of their initial adsorption capacities. Therefore, enhanced separation of stable-state Cd from DSW using FHGM presents an effective new treatment technology. The preparation of FHGM also means that it provides a new green and economic treatment method for the remediation of heavy metal pollution in the solid phase (not limited to DSW).
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
DESALINATION
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2025
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IF 9.8
Xingyu Fu,Minsi Shi,Dingyang Chen,Zixu Ren,Qing Bai,Rui Zhao
Extracting uranium from seawater through adsorption is an effective approach to ensure the sustainable development of nuclear energy. However, the currently developed adsorbents suffer from high cost or low adsorption efficiency. Herein, a low-cost and easily prepared bio-based adsorbent (TBAs) was synthesized from tannin via the phenol-aldehyde condensation. The preparation cost of TBAs was only $1.67 kg −1 , which was close to those of traditional low-cost adsorbents (e.g. activated carbons and zeolites). Moreover, TBAs had abundant active phenolic hydroxyl groups, which contributed to the high affinity toward uranyl ions. As a result, TBAs exhibited a high uptake of 897 mg g −1 in uranium spiked solution and good selectivity against common competing metal ions. Additionally, TBAs also displayed good reusability with an 8 % reduction in uranium adsorption capacity after twenty adsorption-desorption cycles. For practical uranium extraction from natural seawater, TBAs could be loaded on melamine foam to obtain macroscopic adsorbent (MF@TBAs). An extraction capacity of 4.2 mg g −1 from natural seawater within 16 days could be achieved, which surpassed most of reported bio-adsorbents. Significantly, the total economic cost of uranium extraction by MF@TBAs was $43.7–62.6 per kg of uranium, lower than that of currently available uranium adsorbents. All the above results indicate that TBAs have great potential in the field of economical uranium extraction from seawater.
研究领域:
材料科学
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环境科学
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核能工程
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产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
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2024
·
IF 6.9
Dawei Lan,Huiwen Zhu,Jianwen Zhang,Fan Wang,Yueying Zheng,Zeyu Guo,Gang Yang,Mengxia Xu,Tao Wu
Metal-organic frameworks (MOFs) is a promising material that can be used in many fields, including environmental remediation. In this work, a novel adsorbent was successfully prepared by doping the Co element into the framework of UiO-66 with an in-situ oil bath synthesis. This modification ensured that the materials retained relatively good crystallinity. The Co-doping process had a major impact on the particle size and morphology of the original MOFs. The CoUiO-2 exhibited larger surface area and pore size than pristine UiO-66. Accordingly, the maximum adsorption amount of malachite green (MG) on CoUiO-2 (628.93 mg/g) was significantly larger compared with UiO-66 (343.64 mg/g), which was due to more active adsorption sites. In addition, the CoUiO-2 also showed a superior adsorption capacity on rhodamine B (RhB) (1106.22 mg/g). The adsorption process was well described by both the pseudo-second order and Langmuir models, indicating it was dominated by chemisorption and the adsorbent had a homogeneous surface area for adsorption. Therefore, the CoUiO-2 material could be a promising adsorbent for wastewater treatment . This work can provide an important insight into the modification of MOF materials and identify further opportunities to promote the adsorption performance in environmental remediation.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2024
·
IF 8.1
Xiao-han Pan,Ming-Jie Jin,Jian-hua Zu,Gang Han,Jing-jie Diao,Si-yu Liu,Qing Tang
For the efficient removal of radioactive iodide ions from medium and low radioactive contaminated water, an Ag-doped adsorbent was designed via radiation grafting method and chemical modification and applied based on the solid–liquid adsorption method. The silver loading content in the adsorbents could be flexibly decided by adjusting the sulfhydryl content. SEM/EDS, ATR, XPS, and XRD characterization methods were used to determine the features of the new adsorbents. With the silver content 67.9 mg/g and 125.6 mg/g in the adsorbents PGM25%-Ag + and PGM220%-Ag + respectively, the maximum I − adsorption capacities were varied at 29.92 mg/g and 100.82 mg/g. In wide pH conditions (pH7-11), PGM25%-Ag + was sufficient to achieve 131 I removal efficiency of over 92 %, and the removal efficiency was almost unaffected in the coexistence of high concentration (10 mmol/L) of anions and complex real contaminated seawater, highlighting the applicability and selectivity of the adsorbent. The adsorption behavior conformed to the Langmuir isothermal model and pseudo-second-order kinetics model. XPS analysis confirmed that excellent adsorption capacity and selectivity were attributed to the chemical adsorption mechanism of ion exchange and complexation occurs between I − and Ag on the solid–liquid interface, where AgI precipitation formed. In addition, the Ag + -doping adsorbent withstood the harsh conditions of 200 kGy irradiation by observing the ATR structure, thermal stability, and 131 I removal property. This study provides a feasible solution for the treatment of low and medium-radioactive contaminated seawater.
研究领域:
环境科学
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核化学
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材料科学
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DOI
高影响因子
Sustainability
·
2022
·Vol. 14
·期 22
·15290
·
IF 3.889
Jiaqi Bu,Lu Yuan,Hongru Jiang,Chongqing Wang
A novel adsorbent (GO-TOA) was prepared by condensation and self-assembly of graphene oxide (GO) and thiourea, and it was characterized systematically. The results revealed that thiourea has anchored on graphene oxide (GO) successfully. The results showed that GO-TOA had a higher adsorption capacity (641.724 mg/g) and adsorption rate (92.32%) than GO (196.8 mg/g and 65.6%), indicating that the introduction of thiourea greatly improved the adsorption capacity of GO. Adsorption kinetics, adsorption thermodynamics isotherm, and adsorption thermodynamics were used to study the adsorption mechanism. The results show that GO-TOA still has an adsorption rate of 90.44% compared with 0 cycles (92.32), indicating that GO-TOA has good activation and regeneration capacity. In addition, ethanol and dilute hydrochloric acid were used for the desorption of MB, and the effect of desorption was found very well. Through reusability experiments, we also found that GO-TOA has excellent application potential. We believe that GO-TOA will be a potential adsorbent for MB.Keywords:adsorbent;methylene blue;thiourea;graphene oxide;self-assembly
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
ANALYTICA CHIMICA ACTA
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2021
·
IF 6.558
Xiwen Liu,Qingkun Hu,Yuanjun Tong,Nan Li,Sai Ouyang,Huangsheng Yang,Jianqiao Xu,Gangfeng Ouyang
Solid-phase extraction (SPE) is a popular technique for environmental sample pretreatment . However, SPE usually requires complex sample pretreatment processes, which is time-consuming and inconvenient for real-time and on-site monitoring. Herein, a solvent-free, rapid, and user-friendly SPE device was developed by coating the polydimethylsiloxane (PDMS)/divinylbenzene (DVB) sorbent on the inner wall of a sample bottle. The extraction process and desorption process were both carried out in the bottle. The analytes trapped in the sorbent were thermally desorbed and simultaneously sucked out from the bottle by an air sampling tube equipped on field-portable GC-MS. Different to previous work, the sample pretreatment process didn’t require any complicated and time-consuming steps, such as centrifugation or filtration. The total analysis time for each sample was less than 25 min, which was feasible for rapid on-site detection, and thus avoided the losses and contamination of samples in conventional sample storage and transportation processes. Under optimal conditions, the proposed SPE method exhibited wide linear ranges, low detection limits (0.010–0.036 μg L −1 , which were much lower than the maximum levels restricted by the US Environmental Protection Agency and the Chinese GB3838-2002 standard), good intra-bottle repeatability (6.13–7.17%, n = 3) and satisfactory inter-bottle reproducibility (4.73–6.47%, n = 3). Finally, the method was successfully applied to the rapid detection of BTEX in the field. The recoveries of BTEX in spiked water samples ranged from 89.1% to 116.2%. This work presents a novel SPE approach for rapid on-site monitoring in water samples.
研究领域:
分析化学
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环境科学
✓ 已验证
DOI
PubMed
高影响因子
EUROPEAN POLYMER JOURNAL
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2020
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IF 3.862
Ming Li,Guangsen Xiong,Yuling Zhang,Xiaoniu Yu,Qianyong Cao,Huining Xiao
Rhodamine chromophore was introduced into a chitosan based adsorbent developing for Hg (II) detection and removal in aqueous solution. The adsorbent displayed highly sensitive and selective fluorimetric and colorimetric response to Hg (II) with barely interference with more than ten kinds of competitive metal ions. The adsorbent exhibited strong orange fluorescence emission while encountering Hg (II) with the colour turning to red immediately and could be easily detected by naked eyes. In addition, the detection limit of the adsorbent was calculated to be 8.24 × 10 −7 M, and the adsorption capacity was as high as 139.08 mg/g according to the batch adsorption experiments. Furthermore, the interaction between adsorbent and Hg (II) was verified to fit well with Langmuir isotherm model and the pseudo-second-order kinetic model. Thermodynamic studies demonstrated that lower temperature was benefit for the adsorption.
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
危险品化学品经营许可证（带存储）