600 research outputs found
The research trends of metal-organic frameworks in environmental science: a review based on bibliometric analysis
No full textMetal-organic frameworks, an emerging class of porous material, have developed rapidly in recent years. In order to clarify the application of metal-organic frameworks in the field of environmental science, 1386 articles over the last 20 years were obtained from Scopus and analysed by the bibliometric method. And the collaboration between countries, institutions and authors and the co-occurrence of keywords were also conducted using VOS viewer. The results indicated that this area of research has entered a fast-developing stage. The number of articles published has grown from 7 articles in 1999 to 378 articles in 2018. The most productive country was China with 626 articles published. The most productive institution was the Chinese Academy of Sciences, and the most productive author was Jhung SH from Kyungpook National University of South Korea. Although metal-organic frameworks have been widely used in adsorption and catalytic degradation of pollutants from the environment, the removal mechanism of pollutants by MOFs, the stability improvement and the cost reduction of metal-organic frameworks are still the main challenges for their practical applications
Pilot-scale treatment of pharmaceutical berberine wastewater by Fenton oxidation
No full textFenton oxidation was used to treat the berberine finished mother liquor wastewater in pilot scale. To evaluate berberine and COD removal efficiency, the main factors, including pH, H2O2 dosage, Fe2+/H2O2 mass ratio and the water flow (Q), were optimized using response surface methodology (RSM). The results showed that under the optimal conditions, pH 3, H2O2/COD molar ratio of 1.25, Fe2+/H2O2 molar ratio of 0.1, Q 100 L/h [with hydraulic retention time (HRT) of 2.5 h], the COD and berberine removal efficiencies were 35.6 and 91.4 % at initial COD concentration of 4061 mg/L and berberine concentration of 709 mg/L, respectively. The (BOD5)/(COD) ratio (B/C) of the wastewater increased from 0 to 0.3, indicating significantly improved biodegradability of wastewater
Efficiency comparison for treatment of amantadine pharmaceutical wastewater by Fenton, ultrasonic, and Fenton/ultrasonic processes
No full textAmantadine wastewater is quite recalcitrant to biological treatment because of the quite stable adamantine backbone. To improve amantadine wastewater biodegradability, the combined advanced oxidation process, such as Fenton/ultrasonic process, was proposed to treat amantadine industrial wastewater. The efficiency comparisons for the treatment of amantadine wastewater using Fenton oxidation, ultrasonic process, and Fenton/ultrasonic process were conducted. The results of wastewater treatment with Fenton/ultrasonic process indicated that the TOC removal reached 65.6 %, showing almost 4 times of the degradation rate by individual oxidizing action of hydrogen peroxide. Kinetic study revealed that degradation of amantadine wastewater fitted first order kinetics for the three processes under investigation. The synergistic index (f) for the combined process was calculated as 2.24, indicating an obvious synergy effect. The energy consumption for hydrodynamic cavitation-based process has been analyzed on the basis of cavitational yield. Fenton and combined processes reduced the toxicity of wastewater by 50 and 55 %, respectively, while ultrasonic process showed no obvious effect on toxicity reduction. The monitoring of treated wastewater by EEM and GC–MS showed that the Fenton/ultrasonic process effectively removed the organic matters in the wastewater, especially the biodegradation-resistant matters containing benzene ring
Adsorption of berberine by polymeric resin H103: kinetics and thermodynamics
No full textResin adsorption is a promising technology for pharmaceutical removal from wastewater. In this study, polymeric adsorption resin H103 was studied for the removal of berberine from pharmaceutical wastewater. The effects of adsorption temperature, initial pH and equilibrium time on adsorption were investigated. It was found that the optimal temperature, pH and equilibrium time were 343 K, 7.0, and 8 h, respectively, for berberine removal by H103 adsorption. The adsorption kinetics of berberine by H103 could be simulated by first-order kinetic model. The results show that adsorption rate was dependent on both film diffusion and intra-particle diffusion, which limited the adsorption rate when the H103 dosage was less than 2.0 g. When H103 dosage was more than 2.0 g, the film diffusion became the only control factor of adsorption rate. The adsorption isotherms could be expressed by Freundlich model very well indicating that the adsorption of berberine by H103 was a spontaneous and endothermic process
Introduction to the Sustain H2O project
No full textIn the framework of the EU-China Environmental Sustainability Program, the SUSTAIN H2O project was launched in 2013 and ran over 36 months until 2016. Sustain H2O is an abbreviation which stands for “Demonstration of Pollution Discharge Management for Water Quality Improvement in the Songhuajiang-Liaohe River Basin (SLRB)”. The SLRB represents China’s old industrial base with a large number of water-polluting industries. It has been selected as it is a key river basin for water pollution control and water environment management with clearly defined challenges in terms of pollution emission reduction and water quality improvement. Some of these challenges/problems include excessive discharge of pollutants, no optimal load allocation mechanism of quantity control, poor water quality and severely damaged water ecology as well as high risk of environmental pollution accidental events that threaten the safety of drinking water sources. Moreover, the SLRB is a trans-national (transboundary) river catchment, flowing from China to Russia, and therefore is well suited as a joint Sino-EU action
River health assessment, ecological restoration and management system
No full textHealthy river ecosystems maintain an integrity of their structural composition (including physical, chemical and biological composition), ecological processes and ecosystem functions. They have the ability to resist disturbance and restore their structure and function, and also provide ecological services in accordance with natural and human needs. River health assessment can identify water bodies with poor health and their belonging watersheds, and provide possible causes affecting river ecological conditions. In Europe and the United States and other developed countries, river health assessment has turned out to be an effective method for environmental water management
A Hybrid Relay Selection Scheme Using Differential Modulation
No full textIn this paper, we propose a hybrid relay selection (RRS) scheme in a general cooperative network using differential modulation. In the HRS scheme, when the destination decodes successfully, the relay nodes will remain silent. Otherwise optimal relay node has to be determined to make an additional transmission. In this process, all the relays are divided into two groups, referred to as an amplify-and-forward (AAF) relay group and a decode-and-forward (DAF) relay group depending on whether they can decode correctly or not. The relay, which has the maximum signal-to-noise ratio (SNR) at the destination, will be selected from both AAF and DAF relay groups. Simulation results show that the proposed relay selection scheme significantly outperforms the conventional AAF selection in terms of both frame error rate (FER) and throughput, and these performance gains considerably grow as the number of relay nodes increases.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000272057700195&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Computer Science, Hardware & ArchitectureComputer Science, Theory & MethodsTelecommunicationsEICPCI-S(ISTP)
Differential Bi-Directional Relay Selection Using Analog Network Coding
No full textIn this paper, we consider a general bi-directional relay network with two sources and N relays when neither the source nodes nor the relays know the channel state information (CSI). A bi-directional relay selection scheme is proposed using differential analog network coding (BRS-DANC), and a simple linear detector is given to recover the received signals. In the proposed scheme, we provide an optimal and a sub-optimal methods to select the relay node from a single source by minimizing the average symbol error rate (SER). The performance of the proposed BRS-DANC scheme is analyzed, and a simple asymptotic SER expression is derived. It is shown that the SER performance of the proposed differential scheme is about 3 dB away from that of the coherent detection scheme.http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000299203101017&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701Engineering, Electrical & ElectronicTelecommunicationsEICPCI-S(ISTP)
Management methods and demonstration on pollution load control of Song-Liao river basin
No full textThis deliverables reports the “aquatic eco-function zoning map” delineation activities of the SUSTAIN H2O project consortium during the project’s reporting period
Chinese Water Systems
No full textThis open-access book addresses latest Sino-German results of the joint research efforts within Major Water Program of the Chinese Government supported by German research funding. The Major Water Program aims at the restoration of polluted water environments and sustainable management of water resources in China. The joint BMBF-CLIENT project SINOWATER deals with three most significant and strongest polluted Chinese waters, the river Liao and the Dian-lake as well as Tai-lake in the area of the metropolises Shenyang, Kunming and Suzhou, respectively. The project was conducted by the Research Institute for Water and Waste Management at RWTH Aachen (FiW) e.V., Bavarian State Ministry of the Environment and Consumer Protection, Technical University of Munich, RWTH Aachen University, German and Chinese companies (Martin Membrane Systems AG, Steinhardt GmbH Wassertechnik, GuHong, JT-elektronik, bluemetric, Huawang Water, EVU Group, Atemis GmbH, i+f process GmbH) in close cooperation with Chinese Academy of Environmental Sciences, Tongji University, and the Dianchi Lake Management Authorities. Overall, the joint Sino-German research project SINOWATER provided solutions for the improvement of the water quality in the mentioned water bodies as well as development and optimization of Good Water Governance. These objectives could be achieved through the implementation of innovative German water technologies and the optimization of water management elements in the fields of industrial and municipal wastewater treatment as well as river and shallow lake management
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