HYDROMETALLURGY
·
2023
·
IF 4.7
Qian Xiao,Xueyu Wang,Lianjun Song,Fengfeng Li,Qiuju Li,Lanlan He,Zhen Shen,Fangxiang Luo,Songdong Ding
The increasing demand and limited natural resources for rare precious metal palladium render its separation and recovery from secondary sources such as acidic nuclear liquid waste greatly interesting. Herein, a novel Et-Tol-DAPhen extraction resin was prepared by impregnating Amberlite XAD-7 resin with a phenanthroline-derived diamide extractant N , N ′-diethyl- N , N ′-ditolyl-2,9-diamide-1,10-phenanthroline (Et-Tol-DAPhen), and the adsorption behavior of this new extraction resin towards Pd 2+ in HNO 3 solution was investigated through the batch and column experiments. The Et-Tol-DAPhen extraction resin exhibited strong adsorbability, high adsorption capacity, excellent selectivity and good reusability for Pd 2+ in highly acidic HNO 3 solution. In addition, the pseudo-second-order and Langmuir models were applied to understand the adsorption process of Pd 2+ on Et-Tol-DAPhen extraction resin, respectively. It demonstrated the characteristics of a uniform single-layer chemisorption . The maximum uptake capacity could reach as high as 74.6 mg g − 1 for Pd 2+ in 3.0 mol/L HNO 3 solution which is much higher than most adsorbent materials of palladium reported before. Furthermore, Et-Tol-DAPhen extraction resin could selectively uptake Pd 2+ from a simulated acidic nuclear waste solution containing 20 different kinds of ions with the separation factor SF Pd/M values as high as 100 to 10,000. Moreover, although the adsorption efficiency had a slight decrease after 5 times of adsorption-desorption process, it still remained at a high level. This new extraction resin displayed a potential application prospect in the field of separation and recovery of Pd 2+ from acidic nuclear liquid waste .
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2017
·
IF 3.359
Fuhai Li,Yun Shang,Zuoming Ding,Hanqin Weng,Jiaxin Xiao,Mingzhang Lin
The extraction and separation of platinum group metals (PGMs) from HLLW is of great value for resource recycling and the running of reprocessing plants. In this paper, the photochemical method was proposed to extract and separate PGMs (Pd, Ru) from simulated high level liquid wastes (HLLW). Pd and Ru metal were extracted from aqueous solution by photoreduction with high efficiency (reduction ratio >90%) in the presence of alcohols, which was confirmed by UV–vis spectroscopy, XRD, XPS and TEM analysis. The effects of various parameters such as exposure wavelength, reducing agents, Cl − and pH value were investigated to optimize the photoreaction. The highly efficient extraction and separation of Pd or/and Ru metal from their mixture with lanthanide (Nd) by selective photoreduction was realized. The results suggest that the photochemical method is a promising method for the efficient extraction and separation of PGMs from HLLW.
研究领域:
化学
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核能工程
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环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2025
·
IF 2.1
Yue Wang,Xiaohe Wang,Saisai Wang,JiaWei Zhao,Yang Wu,Tao Zhang,Zhigang Zhang,Wenxiu Li
There is a large amount of ethanol (EtOH) and a small amount of furfural (FF) in the ethanol pulping waste liquid. How to separate FF, a high value-added product, efficiently and cleanly and at the same time recover EtOH effectively and save energy is an urgent problem. This article describes the phase equilibrium process of extracting FF from wood pulp waste liquor by ionic liquids (ILs) 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF6])/1-pentyl-3-methylimidazolium hexafluorophosphate ([PMIM][PF6]) as the extractant. Two ILs have excellent distribution coefficients (D) and selectivity (S) for FF, which can separate EtOH and FF well. A set of extraction performance evaluation methods based on the COSMO-RS model, liquid–liquid extraction method, and NRTL simulation were proposed. Combined with quantum chemical calculations such as interaction energy (ΔE), electrostatic potential analysis, and interaction region indicator, analysis of internal interaction and extraction mechanism between different molecules is realized.
研究领域:
化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2023
·
IF 13.6
Hanqin Weng,Yi Wang,Fuhai Li,Yusa Muroya,Shinichi Yamashita,Sheng Cheng
Recovery of platinum group metals (PGMs) including palladium (Pd), rhodium (Rh), and ruthenium (Ru) from high-level radioactive liquid waste (HLLW) possesses enormous environmental and economic benefits. A non-contact photoreduction method was herein developed to selectively recover each PGM from HLLW. Soluble Pd(II), Rh(III), and Ru(III) ions were reduced to insoluble zero-valent metals and separated from simulated HLLW containing neodymium (Nd) as a representative for lanthanides , another main component in HLLW. Detailed investigation on the photoreduction of different PGMs revealed that Pd(II) could be reduced under 254- or 300-nm UV exposure using either ethanol or isopropanol as reductants. Only 300-nm UV light enabled the reduction of Rh(III) in the presence of ethanol or isopropanol. Ru(III) was the most difficult to reduce, which was only realized by 300-nm UV illumination in isopropanol solution. The effects of pH was also studied, suggesting that lower pH favored the separation of Rh(III) but hindered the reduction of Pd(II) and Ru(III). A delicate three-step process was accordingly designed to achieve the selective recovery of each PGM from simulated HLLW. Pd(II) was reduced by 254-nm UV light with the help of ethanol in the first step. Then Rh(III) was reduced by 300-UV light in the second step after the pH was adjusted to 0.5 to suppress the Ru(III) reduction. In the third step, Ru(III) was reduced by 300-nm UV light after isopropanol was added and the pH was adjusted to 3.2. The separation ratios of Pd, Rh, and Ru exceeded 99.8%, 99.9%, and 90.0%, respectively. Meanwhile, all Nd(III) still remained in the simulated HLLW. The separation coefficients between Pd/Rh and Rh/Ru exceeded 56,000 and 75,000, respectively. This work may provide an alternative method to recover PGMs from HLLW, which minimize the secondary radioactive wastes compared with other approaches.
研究领域:
环境科学
·
核化学与放射化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
·
2025
·
IF 7.2
Jianfeng Zhang,Xianfeng Lin,Xiaoyu Lin,Xu Song,Yu Wu,Fengyuan Jin,Hanchi Wang,Jing Liang,Jiejing Zhang
Lignocellulose sulfuric acid pretreatment is widely utilized in many industrial fields, but its waste liquid endangers the environment. While, the waste liquid has potential to promote plant growth in saline-alkali soil due to its strong acidity and high organic matter content. Therefore, the waste liquid was innovatively used to promote rice growth in soda saline-alkali soil, and a novel growth promotion mechanism revealed. This waste liquid promotes rice growth by lowering pH and optimizing microbial community of rice rhizosphere, especially increasing Desulfocapsaceae abundance. Desulfocapsaceae reduced sulfate into H 2 S, which increased the content of abscisic acid (ABA) and betaine in rice, thereby promoting rice growth in saline-alkali soil. The waste liquid increases rice yield in soda saline-alkali land by about 17 %. This study addresses two challenges simultaneously: the sustainable and high value-added management of industrial wastewater and the enhancement of crop growth in challenging saline-alkali soils. This study is of great significance to biomass energy utilization and saline-alkali repair.
研究领域:
环境科学
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微生物学
·
植物学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Liyuan Duan,Guoqiang Li,Shuting Zhang,Hongyu Wang,Yongle Zhao,Yongfa Zhang
In this study, graphitized carbon nitride photocatalysts were successfully prepared by using the desulfurized waste liquid extracting salt from coking plants. The NO x removal efficiency of g-C 3 N 4 synthesized using ammonium thiocyanate (NH 4 SCN), ammonium thiosulfate ((NH 4 ) 2 S 2 O 3 ) and ammonium sulfate ((NH 4 ) 2 SO 4 ) with different mass ratios were evaluated. The results showed that due to the addition of (NH 4 ) 2 S 2 O 3 and (NH 4 ) 2 SO 4 a large amount of sulfur-containing gas was released during pyrolysis, which significantly increased the specific surface area and pore volume of the photocatalysts. The release of sulfur-containing gas also resulted in the incorporation of sulfur, and due to this doping process the band gap of the photocatalyst was widened to 2.94 eV, thus enhancing its visible light response. C vacancies were formed in the hepazine ring, which increased the electron density around the N–(C) 3 bridge bond and formed an electron trapping center, thus inhibiting the recombination of charge carriers. The photocatalysts had increased O 2 adsorption capacity and increased number of amino groups on their surface. This facilitated the rapid generation and consumption of reactive oxygen species, inhibited the accumulation of NO 2 on the surface, reduced the production of NO 2 , thus improving the NO x removal efficiency of the photocatalysts. The principle of using “waste for waste control” was achieved, and a new method for nitrogen oxide removal was provided.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2024
·
IF 1.5
Jiang Xuan,Dai Bingyu,Zhou Yun,Chang Beijia,Li Yifan,Du Chen,Liu Tonghuan
Uranium wastewater is produced in many aspects of the nuclear fuel cycle, so the separation and analysis of uranium in Uranium wastewater is becoming increasingly important. In this work, we engineered and synthesized a novel uranium-targeted material P204 (di(2-ethylhexyl) phosphate) resin, The maximum adsorption capacity of P204 resin for uranium reached 101.11 mg/g at 303 K. Moreover, it maintained excellent selectivity, maintaining high performance even after 65 h of immersion in high concentrations of HNO 3 . Most prominently, the P204 resin has demonstrated significant potential in the treatment of actual uranium mine wastewater.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2021
·
IF 10.588
Qingming Song,Ya Liu,Lingen Zhang,Zhenming Xu
With a huge amount of waste liquid crystal displays (LCDs) generated annually, their proper recycling raises continuous concern to realize pollution control (heavy metal and liquid crystal) and resource recovery (indium). However, due to their multi-metal feature, traditional hydrometallurgy lacks of sufficient selectivity, which makes the recycling route lengthy, costly, and generate more waste. Electrodeposition acts as a promising technique for selective metal extraction from multi-metal system due to its high selectivity and electron as clean reagent. To fully develop its application in metal recovery, stepwise Cu/MoO 2 and In electrodeposition from In-Cu-Mo-Fe waste LCD leachate is explored in depth. Electrochemical behavior analysis shows Cu and MoO 2 can be first electrodeposited for their higher electroreduction potential. Cl - plays a key role in accelerating indium electroreduction kinetics, which largely shortens the extraction time without the sacrifice of current efficiency . This accelerating effect is attributed to the increased concentration of electroactive species or collision frequency . Under optimized condition, 99.41% of indium (> 99% purity) can be electrodeposited within 13 h with high current efficiency. This study provides a cleaner approach for waste LCDs recycling and gives implications for the potential application of electrochemical technique in e-waste recycling.
研究领域:
环境科学
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材料科学
✓ 已验证
DOI
高影响因子
ENERGY CONVERSION AND MANAGEMENT
·
2018
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IF 6.377
Xiaoyu Ma,Zhen Gao,Ming Gao,Yingqun Ma,Hongzhi Ma,Min Zhang,Yu Liu,Qunhui Wang
The residues of food waste after removing waste cooking oils could be converted to microbial lipid by oleaginous yeasts and microbial lipid could be used as a raw material of biodiesel with waste cooking oils. This process would have positive environmental and economic benefits. However, the composition of food waste is extremely complex. Many types of organic acids, such as lactic acid and acetic acid, could be accumulated during the collection, transportation and storage processes. The effects of these substances on microbial lipid production remained unknown. In this study, food waste saccharified liquid (FWSL) without any additional nutrients was fed to Rhodosporidium toruloides 2.1389 for microbial lipid production. Total biomass concentration, lipid concentration and lipid yield increased by 87.4%, 69.4% and 69.3%, respectively, compared with the YPD medium. Remarkably, increasing the concentration of lactic acid in the medium promoted the total biomass concentration of yeast. Furthermore, lipid concentration decreased slightly when single lactic acid or single acetic acid concentration was below 5 g/L or 1 g/L in the culture media. Metal elements that were present in the medium had considerable synergistic effects on lipid production. When four metal elements (i.e. Mg, Ca, Na and K) were present in the medium, total biomass concentration, lipid concentration, lipid content and lipid yield increased by 22.01%, 33.51%, 9.43% and 33.33%, respectively, compared with those in the control group. The interaction among the FWSL compositions that led to the promotion of microbial lipid production was beyond the inhibition effect. The engineering implication analysis evidently suggested that the process of microbial lipid production from FWSL was economically feasible and had potential industrial application prospects.
研究领域:
生物工程
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环境科学
✓ 已验证
DOI
高影响因子
ANALYTICAL LETTERS
·
2025
·
IF 1.8
Wanying Zhao,Yanqin Chen,Jun Tan,Yanru Bai,Fudong Ma
A method utilizing high-performance liquid chromatography with evaporative light scattering detection (HPLC-ELSD) has been developed and validated for the simultaneous determination of raffinose, glucose, sucrose, and stachyose in waste liquid from cottonseed processing and in byproducts including cottonseed meal. The separation was performed using a carbohydrate ES column (250 × 4.6 mm, 5 μm) and isocratic elution with acetonitrile and water (70:30, v/v). The temperature of the column oven was maintained at 35 °C. The drift tube temperature for evaporative light scattering detection (ELSD) was operated 40 °C, while the nitrogen flow was set to 1.5 L·min−1. The saccharides were separated by HPLC-ELSD within 20 min. The coefficients of determination (R2 = 0.9986–0.9999) indicate that there was a linear relationship between saccharides and the response. The limits of detection were 0.004–0.023 mg·mL−1 and the quantification range was from 0.013 to 0.080 mg·mL−1. The intraday and interday precision were from 0.05 to 0.55% and 0.20 to 0.58%, respectively. The recovery was from 102.75 ± 2.03% to 106.76 ± 2.09% and the relative standard deviations were 1.87 to 1.98%. The method exhibited good stability in determining four saccharides in cottonseed processing waste liquid and the resultant byproduct cottonseed meal. This method exhibits high separation efficiency and sensitivity, excellent precision, and simplicity, which allows determination of the high value-added product, raffinose, in cottonseed processing waste liquid and meal.
研究领域:
食品科学
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分析化学
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 10
·6346-6355
·
IF 3.9
Lina Wu,Huiping Wang,Xiangqian Kong,Haibo Wei,Sheng Chen,Lisheng Chi
Effective removal of strontium isotopes in radioactive waste streams has important implications for the environment and the sustainable development of nuclear energy. In this work, a zirconium phosphate/18-crown-ether-6 (ZrP/18C6) composite was prepared using the intercalation method by loading crown ether into zirconium phosphate. The composite was structurally and morphologically characterized by XRD, FT-IR, XPS, and SEM. The adsorption experiments of Sr2+ onto the ZrP/18C6 composite were conducted as a function of temperature, pH, Sr2+ concentration and competing ions. The results indicate ZrP/18C6 can adsorb 98.6% of Sr2+ within 30 minutes at an Sr2+ concentration of 100 mg L−1 and maintain a high removal rate with a distribution coefficient of 7 × 105 mL g−1 when Sr2+ is at a low level of 4.28 mg L−1. The ZrP/18C6 composite reached a maximum adsorption capacity of 195.74 mg g−1 at an Sr2+ concentration of 380 mg L−1, which is significantly higher than the 43.03 mg g−1 of α-ZrP. The adsorption performance of Sr2+ onto ZrP/18C6 is not significantly affected by temperature, pH and competing ions. Furthermore, the adsorption kinetics and thermodynamics were analyzed based on the adsorption data obtained in the present work. It is shown that the adsorption of Sr2+ onto ZrP/18C6 follows the pseudo-second-order model and the Langmuir monolayer model, respectively. Additionally, the adsorption mechanism of Sr2+ by ZrP/18C6 is discussed.
研究领域:
环境科学
·
核化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2025
·
IF 7.8
Junyun Cheng,Chenruobing Zhang,Jie Lin,Yeqiu Zhao,Yu Huang,Meiqing Shi,Zhiqi Zhu,Liyuan Chai,Xu Yan,Qingwei Wang
The coking industry generates hazardous desulfurization waste liquid (DWL), which contains abundant sulfur-containing salts such as ammonium thiocyanate (AT), ammonium sulfate (AS), and ammonium thiosulfate. However, improper handling of DWL poses severe environmental risks. Conventional treatment methods, including high-temperature pyrolysis, chemical precipitation, and evaporation crystallization, suffer from critical limitations: low sulfur recovery rates (typically 40%–70%), high operational costs, and insufficient product purity. To address these challenges, this study innovatively proposes an evaporation-cooling pretreatment process guided by the NH₄SCN-AS-H₂O ternary phase equilibrium system. For the first time, this method achieves ultra-high-purity products: ammonium thiocyanate (AT) at 98.54% purity and ammonium sulfate (AS) at 99.92% purity, with a total sulfur recovery rate of 90.92%—40% higher than traditional approaches. Additionally, the mixed salt (MS) byproduct undergoes solvent crystallization to yield secondary products with purity exceeding 99.96%, eliminating the need for toxic reagents. By integrating phase diagram-guided optimization with streamlined operational procedures, this process significantly reduces costs while ensuring environmental sustainability, thereby establishing a novel pathway for resource recovery from DWL.
研究领域:
环境工程
·
化工技术
·
资源回收
✓ 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）