المؤلفون: Yuanchun Zhou, Bin Wei, Ran Zhang, Hui Li

المصدر: Journal of Water and Climate Change, Vol 13, Iss 2, Pp 463-481 (2022)

مصطلحات موضوعية: bibliometrics, nexus study, sustainable development, uncertainty, water–energy–food–climate, Environmental technology. Sanitary engineering, TD1-1066, Environmental sciences, GE1-350

الوصف: The relationship between changing climate and the three sectors of water, energy and food is increasingly drawing attention today while all of them are vital for sustainable development. This paper undertakes a bibliometric analysis of 1,959 published articles from 2010 to 2020 to provide a knowledge base of current nexus studies. The main research power, knowledge domains, evolution trends and frontier hotspots are analyzed. The main conclusions are as follows: (1) The USA, China and England contributed most in this field. Applied Energy published most articles. (2) The knowledge domains of nexus studies mainly focus on the combination of qualitative and quantitative methods to analyze the mutual consumption of resources, the impact of environmental changes on resources, policy formulation and implementation and so on. Besides direct interlink evaluation, other synergistic impacts should also be considered from the macro and microscale. (3) The evolution trend in this field has changed from the conceptual framework to management policy, risk security and optimal management: from knowing to taking actions. (4) The current hot points of this field are climate change and uncertainty. This study presents an in-depth analysis of water, energy, food and climate nexus research to inform more potential studies in this field. HIGHLIGHTS Nexus needs to be considered in a global and systematic way.; Optimal resource management, policy formulation and implementation are the main topics.; Climate change and uncertainty are the major issues concerned by nexus.; Other synergistic impacts should also be considered in the nexus study.;

وصف الملف: electronic resource

العلاقة: http://jwcc.iwaponline.com/content/13/2/463Test; https://doaj.org/toc/2040-2244Test; https://doaj.org/toc/2408-9354Test

الوصول الحر: https://doaj.org/article/7dea4d08b8b542b8ab5badb12aede6d9Test

المؤلفون: Jian Zhang, Wenjing Lu, Hui Li, Siyan Zhan, Ximo Wang, Changpo Ma, Zumin Qiu

المصدر: Water Science and Technology, Vol 83, Iss 5, Pp 1183-1197 (2021)

مصطلحات موضوعية: adsorption, congo red, polyethyleneimine-impregnated, waste bamboo powder, Environmental technology. Sanitary engineering, TD1-1066

الوصف: In this study, the polyethyleneimine (PEI) modified waste bamboo powder (WBP-Na-PEI) was successfully prepared and applied to adsorbing Congo red (CR) dye from aqueous solution. The obtained materials were characterized by field emission scanning electron microscope, X-ray diffraction, Fourier transform-infrared, and thermogravimetric analysis. The results showed that WBP-Na-PEI(1.8 K-5) was synthesized successfully and PEI uniformly covered the WBP-Na-PEI(1.8 K-5) surface. In the process of adsorption, four kinds of influencing factors were discussed, and the adsorption mechanisms such as kinetics, isotherm, thermodynamics were explored. The maximum adsorption capacity of WBP-Na-PEI(1.8 K-5) was 992.94 mg·g−1 at 298 ± 1 K, and the removal efficiency was over 98%. Pseudo-first-order, pseudo-second-order and intra-particle diffusion models were studied, the results showed that the adsorption process conformed to the pseudo-second-order model, and the rate of this process was controlled by many steps. Furthermore, the removal efficiency of the adsorption kinetics reached 85% within 10 minutes. The results of the isotherm model and thermodynamics showed that the adsorption process was consistent with the Langmuir model and was mainly a spontaneous chemical endothermic process of monolayer. And the removal efficiency of the adsorbent reached 93% at the concentration of 400 mg/L, which can be expected to have a broad prospect in the treatment of CR industrial wastewater.

وصف الملف: electronic resource

العلاقة: http://wst.iwaponline.com/content/83/5/1183Test; https://doaj.org/toc/0273-1223Test; https://doaj.org/toc/1996-9732Test

الوصول الحر: https://doaj.org/article/77577a4b2fe245afb0c4f020c89e25f2Test

المؤلفون: Yuanchun Zhou, Bin Wei, Ran Zhang, Hui Li

المصدر: Journal of Water and Climate Change. 13:463-481

مصطلحات موضوعية: Atmospheric Science, Global and Planetary Change, Management, Monitoring, Policy and Law, Water Science and Technology

الوصف: The relationship between changing climate and the three sectors of water, energy and food is increasingly drawing attention today while all of them are vital for sustainable development. This paper undertakes a bibliometric analysis of 1,959 published articles from 2010 to 2020 to provide a knowledge base of current nexus studies. The main research power, knowledge domains, evolution trends and frontier hotspots are analyzed. The main conclusions are as follows: (1) The USA, China and England contributed most in this field. Applied Energy published most articles. (2) The knowledge domains of nexus studies mainly focus on the combination of qualitative and quantitative methods to analyze the mutual consumption of resources, the impact of environmental changes on resources, policy formulation and implementation and so on. Besides direct interlink evaluation, other synergistic impacts should also be considered from the macro and microscale. (3) The evolution trend in this field has changed from the conceptual framework to management policy, risk security and optimal management: from knowing to taking actions. (4) The current hot points of this field are climate change and uncertainty. This study presents an in-depth analysis of water, energy, food and climate nexus research to inform more potential studies in this field.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::2fccfb402901984e65268c213a2a5f55Test
https://doi.org/10.2166/wcc.2021.450Test

المؤلفون: Hui Li, Ximo Wang, Changpo Ma, Wenjing Lu, Siyan Zhan, Jian Zhang, Zumin Qiu

المصدر: Water Science and Technology, Vol 83, Iss 5, Pp 1183-1197 (2021)

مصطلحات موضوعية: Thermogravimetric analysis, Environmental Engineering, Materials science, polyethyleneimine-impregnated, 02 engineering and technology, Alkalies, Wastewater, 010501 environmental sciences, 01 natural sciences, Endothermic process, Environmental technology. Sanitary engineering, Industrial wastewater treatment, symbols.namesake, Adsorption, Spectroscopy, Fourier Transform Infrared, Monolayer, Polyethyleneimine, congo red, TD1-1066, 0105 earth and related environmental sciences, Water Science and Technology, Aqueous solution, Langmuir adsorption model, Hydrogen-Ion Concentration, 021001 nanoscience & nanotechnology, Field emission microscopy, Kinetics, adsorption, symbols, Thermodynamics, Powders, 0210 nano-technology, Water Pollutants, Chemical, Nuclear chemistry, waste bamboo powder

الوصف: In this study, the polyethyleneimine (PEI) modified waste bamboo powder (WBP-Na-PEI) was successfully prepared and applied to adsorbing Congo red (CR) dye from aqueous solution. The obtained materials were characterized by field emission scanning electron microscope, X-ray diffraction, Fourier transform-infrared, and thermogravimetric analysis. The results showed that WBP-Na-PEI(1.8 K-5) was synthesized successfully and PEI uniformly covered the WBP-Na-PEI(1.8 K-5) surface. In the process of adsorption, four kinds of influencing factors were discussed, and the adsorption mechanisms such as kinetics, isotherm, thermodynamics were explored. The maximum adsorption capacity of WBP-Na-PEI(1.8 K-5) was 992.94 mg·g−1 at 298 ± 1 K, and the removal efficiency was over 98%. Pseudo-first-order, pseudo-second-order and intra-particle diffusion models were studied, the results showed that the adsorption process conformed to the pseudo-second-order model, and the rate of this process was controlled by many steps. Furthermore, the removal efficiency of the adsorption kinetics reached 85% within 10 minutes. The results of the isotherm model and thermodynamics showed that the adsorption process was consistent with the Langmuir model and was mainly a spontaneous chemical endothermic process of monolayer. And the removal efficiency of the adsorbent reached 93% at the concentration of 400 mg/L, which can be expected to have a broad prospect in the treatment of CR industrial wastewater.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::944b6520b4af0647a1d5682ef446a553Test
http://wst.iwaponline.com/content/83/5/1183Test

المؤلفون: Yu Tian, Hui Li, Lipin Li, Wei Zuo, Jia Liu, Jun Zhang

المصدر: Water Science and Technology. 74:2202-2210

مصطلحات موضوعية: Environmental Engineering, 0208 environmental biotechnology, chemistry.chemical_element, 02 engineering and technology, 010501 environmental sciences, Membrane bioreactor, Waste Disposal, Fluid, 01 natural sciences, chemistry.chemical_compound, Bioreactors, Sulfate, Effluent, 0105 earth and related environmental sciences, Water Science and Technology, Biological Oxygen Demand Analysis, Chromatography, Sewage, Chemical treatment, Phosphorus, Membrane fouling, Membranes, Artificial, Pulp and paper industry, 020801 environmental engineering, Enhanced biological phosphorus removal, chemistry, Sewage treatment

الوصف: A membrane bioreactor (MBR) coupled with a worm reactor (SSBWR) was designed as SSBWR-MBR for sewage treatment and excess sludge reduction. However, total phosphorus (TP) release caused by worm predation in the SSBWR could increase the effluent TP concentration in the SSBWR-MBR. To decrease the amount of TP excreted, chemical treatment reactor was connected after the SSBWR-MBR to remove the excess phosphorus (P). The effects of chemical treatment at different time intervals on the performance of the SSBWR-MBR were assessed. The results showed that a maximum TP removal efficiency of 21.5 ± 1.0% was achieved in the SSBWR-MBR after chemical treatment. More importantly, a higher sulfate concentration induced by chemical treatment could promote TP release in the SSBWR, which provided further TP removal from the SSBWR-MBR. Additionally, chemical oxygen demand (COD) removal efficiency of the SSBWR-MBR was increased by 1.3% after effective chemical treatment. In the SSBWR-MBR, the chemical treatment had little effects on NH3-N removal and sludge production. Eventually, chemical treatment also alleviated the membrane fouling in the SSBWR-MBR. In this work, the improvement on TP, COD removal and membrane fouling alleviation was achieved in the SSBWR-MBR using additional chemical treatment.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::52ac421e491a060f87e52e5875b72402Test
https://doi.org/10.2166/wst.2016.403Test

المؤلفون: Shujuan Xiao, Xiaohui Lu, Hui Liu, Jiantao Gu, Shouwu Yu, Xiaoyao Tan

المصدر: Water Science and Technology, Vol 86, Iss 10, Pp 2642-2657 (2022)

مصطلحات موضوعية: cau-1 mof modification, nanofiltration membrane, surface modification, thin-film nanocomposite (tfn), Environmental technology. Sanitary engineering, TD1-1066

الوصف: The synthesis of optimized thin film nanocomposite (TFN) membrane with no or few defects is an efficacious method which can improve nanofiltration performance. However, poor dispersion of fillers in the organic phase and wrong compatibility between fillers and polymerizate are still a serious problem. In this study, the particle size of metal organic framework (MOF), aluminum-based metal-organic frameworks (CAU-1) was modulated and for the first time, dodecyl aldehyde was used to modify the surface hydrophobicity of CAU-1, which improved the dispersibility and inhibited the aggregation in the trimesoyl chloride (TMC)/n-hexane solution; later CAU-1 and modified CAU-1 were incorporated into the polyamide (PA) selective layer to synthesize TFN membrane by interfacial polymerization (IP). The particle size modulation and modification of the CAU-1 were demonstrated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared (FTIR) characterization. The characterization showed that PA selective layer was synthesized on the top layer of polysulfone (PSF) substrate. The pure water flux of the TFN membrane was increased to 79.89 ± 1.24 L·m−2·h−1·bar−1 compared to the original thin film composite (TFC) membrane, which was due to the polymerization of 100 nm modified CAU-1 on the PA layer to form a new water molecular channel, thus increasing the water flux by about 70%. HIGHLIGHTS CAU-1 nanoparticles were modified with dodecyl aldehyde.; CAU-1 and modified CAU-1 nanoparticles were used to prepare TFN membranes.; The TFN membranes exhibit high water flux and high salt rejection.;

وصف الملف: electronic resource

العلاقة: http://wst.iwaponline.com/content/86/10/2642Test; https://doaj.org/toc/0273-1223Test; https://doaj.org/toc/1996-9732Test

الوصول الحر: https://doaj.org/article/7632dc6dcd1646ba8e6433d19fe127eaTest

المؤلفون: Hui Li, Mei Hong, Yongsheng Zhao, Jing Bai, Rui Zhou, Zi-Fang Chen

المصدر: Water Science and Technology. 70:685-690

مصطلحات موضوعية: Environmental Engineering, Volatilisation, Phenol, Chemistry, chemistry.chemical_element, Mercury, Mercury (element), chemistry.chemical_compound, Environmental chemistry, Vadose zone, Volatilization, Porous medium, Groundwater, Oxidation-Reduction, Porosity, Phenol biodegradation, Water Pollutants, Chemical, Water Science and Technology

الوصف: Research on the migration and transformation of phenol with space and temporal variability in the vadose zone is hindered by monitoring technology in field experiments. Four column experiments were conducted to investigate the effect of porous media size, volatilization, biological effects, and oxidation on the transport of phenol in the vadose zone. The initial inflow phenol concentration of each column was 500 mg/L, and the final outflow concentrations were 0, 348, 240, and 365 mg/L, More than 90% of reduction of phenol concentration occurred at the top of the simulation column. Results show that volatilization and oxidation are the main factors that could lead to the decrease of phenol concentration in an open system. However, these two processes cannot be accurately separated. The migration rate of phenol was larger in coarse sands (6.06 cm/d) than in fine sands (4.55 cm/d). Phenol biodegradation did not occur under experimental conditions. However, mercury (as biological inhibitor) could react with phenol to generate a mercury–phenol complex, which could lead to the reduction of phenol concentration to 21.6% in the simulation experiment.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::53d2870122b037ea722f9c860278db7aTest
https://doi.org/10.2166/wst.2014.279Test

المؤلفون: Hui Liu, Fenwu Liu, Jian Zhang, Jiaxing Zhou, Wenlong Bi, Junmei Qin, Qingjie Hou, Yue Ni, Shaozu Xu, Chen Yang

المصدر: Water Science and Technology, Vol 85, Iss 10, Pp 2912-2927 (2022)

مصطلحات موضوعية: advanced oxidation processes, methyl orange, persulfate, pyrite, Environmental technology. Sanitary engineering, TD1-1066

الوصف: Degradation mechanism of methyl orange (MO), a typical azo dye, with pyrite (FeS2) activated persulfate (PS) was explored. The results showed that when the initial concentration of MO was 0.1 mM, FeS2 was 1.6 g/L and PS was 1.0 mM, the removal rate of MO could reach 92.9% in 150 min, and the removal rate of total organic carbon could reach 14.1%. In addition, both pH ≤ 2 and pH ≥ 10 could have an inhibitory effect in the FeS2/PS system. Furthermore, Cl− and low concentrations of had little effect on the degradation of MO with FeS2/PS. However, and high concentrations of could inhibit the degradation of MO in the system. Besides, MO in river water and tap water were not degraded in FeS2/PS system, but acidification (pH = 4) would greatly promote the degradation. In addition, the removal rate of MO with FeS2/PS could still reach about 90% after five cycles of FeS2. Furthermore, the intermediates and possible degradation pathways were speculated by LC-MS, and the degradation mechanism of MO by FeS2/PS was that the cycle of Fe(III)/Fe(II) could continuously activate persulfate to produce . The results could provide technical support for azo dye degradation in the FeS2/PS system. HIGHLIGHTS FeS2/PS system could effectively remove methyl orange.; Acification (pH = 4) could promote the degradation of methyl orange in river water by a FeS2/PS system.; FeS2 could be recycled for activation of PS.;

وصف الملف: electronic resource

العلاقة: http://wst.iwaponline.com/content/85/10/2912Test; https://doaj.org/toc/0273-1223Test; https://doaj.org/toc/1996-9732Test

الوصول الحر: https://doaj.org/article/d85ae2fd447d4c1190daae46bbadacf6Test

المؤلفون: Wei Wang, Xu Zhou, Wen Liu, Hui Li

المصدر: Water Science and Technology. 63:1621-1628

مصطلحات موضوعية: Ceramics, Time Factors, Environmental Engineering, Waste Disposal, Fluid, Horseradish peroxidase, chemistry.chemical_compound, Ceramic, Horseradish Peroxidase, Water Science and Technology, Aqueous solution, Chromatography, biology, Chemistry, Silanes, Enzymes, Immobilized, Silane, Porous ceramics, Glutaral, visual_art, visual_art.visual_art_medium, biology.protein, Glutaraldehyde, Oily wastewater, Oils, Water Pollutants, Chemical, Nuclear chemistry

الوصف: Horseradish peroxidase (HRP) is proved being effective in eliminating oil from aqueous solutions, but the elimination is expensive because free HRP can not be reused. In present work, HRP was successfully immobilized on cordierite porous ceramics support with a novel method of N-β-aminoethyl-γ-aminopropyl-trimethoxysilane modification and glutaraldehyde activation. Under the optimized immobilized conditions, the actual immobilized HRP was 1.16 mg/g support, the activity of the immobilized HRP could reach as high as 1379.4 U/g support. Experiment results showed that the properties of storage stability, acid-base stability and the tolerance to the pH fluctuation of the immobilized HRP were better than those of the free HRP. The operation stability of the immobilized HRP was also good. The immobilized HRP is suitable for the oily wastewater treatment because of its reusability proved in this work.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1e42af0a44a796abd1201bcf9d68994bTest
https://doi.org/10.2166/wst.2011.228Test

المؤلفون: Mei-Hui Li, Chia-Wei Lin

المصدر: Water Quality Research Journal. 44:355-363

مصطلحات موضوعية: Biochemical oxygen demand, Hydrology, Pollution, Endocrine disruptor, media_common.quotation_subject, Humid subtropical climate, Environmental science, Water quality, Leachate, Surface runoff, Water Science and Technology, Dilution, media_common

الوصف: One closed uncontrolled landfill, the Neihu garbage dump, and one active controlled landfill, the Sanzhuku sanitary landfill, were selected for investigation of their leachate characteristics and effects on adjacent river water quality before and after rainfall in northern Taiwan. A total of seven samplings were made during February and June 2007, with four samplings done after individual rainfall events on study sites. Water quality of runoff samples collected from the Sanzhuku sanitary landfill showed less pollution than the water quality of leachates collected from the Neihu garbage dump; however, some water quality levels of leachate samples collected from the Neihu garbage dump were relatively high, such as ammonia nitrogen (NH3-N), orthophosphate (PO43-) and biochemical oxygen demand (BOD5). At the uncontrolled dump, rainfall lead to dilution effects on river water NH3-N and PO43- concentrations, but not other water quality parameters. In contrast, the concentrations of bisphenol A (BPA) and nonylphenol were increased in both types of landfills after rainfall in the present study. Dilution effects of rainfall on most water quality parameters and toxicity tests were observed in the Neihu garbage dump leachates after rainfall, but not for the Sanzhuku Landfill runoff. The highest concentration of BPA measured in this study was 25.8 μg L-1 in the Sanzhuku sanitary landfill runoff after the heaviest rainfall event, during which 236 mm of rainfall accumulated over four days. The results of this study suggest that both uncontrolled and controlled landfill leachates can be an important potential pollution source of BPA to adjacent water bodies.

الوصول الحر: https://explore.openaire.eu/search/publication?articleId=doi_________::7f4841953488dbbd8c787aa9da46be87Test
https://doi.org/10.2166/wqrj.2009.036Test