scholarly journals Removal of toxic metals using ferrate(VI): a review

2019 ◽  
Vol 80 (7) ◽  
pp. 1213-1225
Author(s):  
Shuyu Dong ◽  
Yao Mu ◽  
Xuhui Sun
Keyword(s):  
Wastewater Treatment ◽  
Toxic Metals ◽  
Heavy Metal Contamination ◽  
Critical Issue ◽  
Effective Parameters ◽  
Complete Understanding ◽  
Treatment Agent ◽  
New Type ◽  
Environmental Decontamination ◽  
Further Development

Abstract Heavy metal contamination of water resources is a critical issue which adversely affects humans. Ferrate(VI) (FeVIO42−, Fe(VI)), as a new type of green multifunctional water treatment agent, has shown promising potential for environmental decontamination. A complete understanding of the interactions between ferrate(VI) and toxic metals can be conducive to the further development of ferrate(VI) technology for application to wastewater treatment. This review first introduces the purification of ferrate(VI) technology for toxic metals including free heavy metals and metal complexes briefly. The effective parameters are then analyzed and discussed in detail. Subsequently, the reactivity and mechanisms of ferrate(VI) with toxic metals are emphatically described. Finally, possible research challenges and directions for ferrate(VI) technology applied to wastewater treatment in the future are summarized.

scholarly journals Tannin-Furanic Foams Formed My Mechanical Agitation: Influence of Surfactant and Ingredient Ratios

Polymers ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 3058
Author(s):  
Thomas Sepperer ◽  
Primož Šket ◽  
Alexander Petutschnigg ◽  
Nicola Hüsing
Keyword(s):  
Wastewater Treatment ◽  
Cross Sections ◽  
Resonance Spectroscopy ◽  
Mechanical Agitation ◽  
13C Nuclear Magnetic Resonance ◽  
Treatment Agent ◽  
New Type ◽  
Linear Poly ◽  
Increasing Demand ◽  
Compression Resistance

With increasing demand of alternatives to oil-based lightweight materials, the development of tannin-based foams is getting more and more attention. In this paper, an alternative to traditionally used solvent-evaporation in the production of tannin-foams is presented. Mixing the tannin-furanic resin with different amounts of ionic and non-ionic surfactants at high agitational speed allows for the formation of highly porous, mechanically stable tannin-foams. Investigations on the influence of surfactant type and ingredient ratios on the foaming behavior and properties of the final foams were conducted. Materials obtained via this route do present extraordinary compression resistance (about 0.8 MPa), good thermal insulation (40 mW/m·K) and are suitable as a wastewater treatment agent at the end-of-life. It was shown that during mechanical blowing, homogeneous cross-sections and almost perfectly round pores form, leading to the high compression resistance. Investigations by means of Fourier transform infrared and 13C nuclear magnetic resonance spectroscopy show that the milder reaction environment leads to more linear poly(furfuryl alcohol)-tannin chains. This new type of tannin foam allows for use in various different fields of application ranging from durable building insulation to wastewater treatment.

scholarly journals THE HOUSING POLICY AT THE MODERN TIME IN THE TOWN OF ORENBURG

2013 ◽  
Vol 3 (4) ◽  
pp. 11-18
Author(s):  
E. I KORNILOVA
Keyword(s):  
Housing Policy ◽  
Modern Time ◽  
Main Attention ◽  
New Type ◽  
Further Development ◽  
The Town

This article raises questions about development housing in planning structure in the town of Orenburg. The author talks about the development housing since founding of the town of Orenburg and identifies the main historical stages and living buildings. The main attention is on the development housing at the modern time. For the most part it is new type of housing for example multi-storey residential complex, townhouse, individual dwelling. On the basis of the analysis, that was made the author gives some recommendations for the further development of the housing policy of Orenburg.

On the Dynamic Mechanism of Developing Recycling Economy for Enterprises in China

2010 ◽  
Vol 1 (1) ◽  
pp. 20-29
Author(s):  
Huiqiang Cheng ◽  
Xiang-Yun Du
Keyword(s):  
Economic Behavior ◽  
The Public ◽  
Behavior Development ◽  
Recycling Economy ◽  
New Type ◽  
The Government ◽  
Economic Growth Mode ◽  
Further Development ◽  
Government Promotion ◽  
Sticking Point

Recycling economy, as a new type of development model and economic growth mode, will form a social resultant force in government promotion, enterprise entities and public participation. Thus, it is quite necessary to discuss on the economic behavior, development restriction and profit motive of the Government, enterprises and the public as the micro-economic entities. Especially in the process of current recycling economic development of China, the sticking point for further development and achievement of Chinese recycling economy lies so much on how to enhance the intrinsic dynamics of the enterprises for developing the recycling economy.

scholarly journals Determination of heavy metals and selenium content in chicken liver at Erbil city, Iraq

2020 ◽  
Vol 9 (3) ◽  
Author(s):  
Hoshyar Saadi Ali ◽  
Dhary Alewy Almashhadany ◽  
Hawraz Sami Khalid
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Inductively Coupled Plasma ◽  
Heavy Metal Contamination ◽  
Optical Emission ◽  
Critical Issue ◽  
Chicken Liver ◽  
Poultry Meat ◽  
Emission Spectrometry ◽  
Toxic Heavy Metals

Heavy metal contamination of poultry meat is a critical issue for human health due to associated risks of cytotoxicity and systemic pathologies after ingestion of such metals. A total of twenty chicken liver samples were collected from markets of Erbil city and analyzed for ten heavy metals contents by Inductively Coupled Plasma Optical Emission Spectrometry. The targeted metals were cadmium (Cd), cobalt (Co), chromium (Cr), copper (Cu), manganese (Mn), nickel (Ni), lead (Pb), mercury (Hg), zinc (Zn) and selenium (Se). The average concentrations (mg/kg) of targeted trace elements were 0.06±0.027, 0.06±0.05, 2.05±0.34, 1.85±0.47, 0.15±0.17, and 33.53±5.24 for Co, Cr, Cu, Mn, Ni, and Zn respectively. Copper (Cu) levels significantly exceeded the maximum permissible limit of WHO. Moreover, the average concentrations of toxic heavy metals and selenium were 0.07±0.037, 0.278±0.10, 0.11±0.083, and 2.01±0.454 mg/kg for Cd, Pb, Hg, and Se respectively. Hg and Pb levels exceeded the permissible limits of WHO. Higher levels of Cu and Hg in poultry may pose a serious threat to consumers which demand countermeasures and precautions to be taken. Iraqi Standards Authority and relevant official institutions are strongly recommended to regulate safe disposal of heavy metal waste in the environment to reduce animal exposure to such metals.

Rethinking China’s Rural Revitalization from a Historical Perspective

2020 ◽  
pp. 009614422095209
Author(s):  
Siu Wai Wong ◽  
Bo-sin Tang ◽  
Jinlong Liu
Keyword(s):  
Rural Areas ◽  
Historical Perspective ◽  
Chinese Society ◽  
Complete Understanding ◽  
Contemporary China ◽  
Chinese City ◽  
Rural Revitalization ◽  
Urban Rural ◽  
New Type ◽  
Urban And Rural Areas

Rural revitalization calls for a new type of urban–rural relations in urbanizing China. Although the importance of urban–rural dichotomy has received increasing attention by scholars interested in studying urban development and governance in contemporary China, their interpretations about the connection between urban and rural areas remain fragmented and ambiguous. This article seeks to trace the origin of the Chinese city and its relations with the countryside in the imperial era. It generates a more complete understanding of the rural–urban relationship in the traditional Chinese society and to appeal for a more rounded research agenda for the Chinese urbanization based on a sound historical perspective. The findings of this study explain why and how the traditional urban–rural continuum has disappeared in contemporary China, and identifies the key lessons and wisdoms that we can borrow from the imperial era when we come to tackle the present urban–rural development.

Cells on Rotating Fibers for Wastewater Treatment

1992 ◽  
Vol 26 (9-11) ◽  
pp. 2505-2506
Author(s):  
R. Clyde
Keyword(s):  
Wastewater Treatment ◽  
Toxic Metals ◽  
High Surface ◽  
High Surface Area ◽  
Pulp Mill ◽  
Pulp Mill Effluent ◽  
Rotating Biological Contactor ◽  
Fast Reactions ◽  
Football Field ◽  
Road Deicer

Fibers have a high surface area so many cells can be immobilized and when the fibers are rotated, fast reactions occur. When Celite® is entrapped in the fibers, even more area is provided. Half a pound of Celite® has the area of a football field! Toxic metals can be removed from wastewater. Pulp mill effluent can be cleaned. Phenol is degraded and the sulfur taken out of coal. A non-polluting road deicer is produced which doesn't corrode bridges or cars and ethanol for cars puts less lead into the air and water. When an RBC (rotating biological contactor) is run half full and a light shone in the top, the light hits a thin moving film to degrade dioxin.

Design and Simulation of New Type Reactor in the Wastewater Treatment System Based on Discharge Plasma

2019 ◽  
Vol 47 (1) ◽  
pp. 952-957
Author(s):  
Hong-Jun Xiang ◽  
Bin Lei ◽  
Xi-Chao Yuan ◽  
Qing-Ao Lv ◽  
Qian Zhang
Keyword(s):  
Wastewater Treatment ◽  
Discharge Plasma ◽  
Treatment System ◽  
Wastewater Treatment System ◽  
Type Reactor ◽  
New Type

Theoretical Modeling for Electroactive Polymer-Ceramic Hybrid Actuation Systems

Aerospace ◽  
2004 ◽  
Author(s):  
Tian-Bing Xu ◽  
Ji Su
Keyword(s):  
Performance Optimization ◽  
High Performance ◽  
Electroactive Polymer ◽  
Actuation System ◽  
Electromechanical Responses ◽  
Electromechanical Performance ◽  
New Type ◽  
Hybrid Actuation ◽  
Actuation Systems ◽  
Further Development

An electroactive polymer-ceramic hybrid actuation system (HYBAS) was recently developed. The HYBAS demonstrates significantly-enhanced electromechanical performance by utilizing advantages of cooperative contributions of the electromechanical responses of an electrostrictive copolymer and an electroactive single crystal. The hybrid actuation system provides not only a new type of device but also a concept to utilize different electroactive materials in a cooperative and efficient method for optimized electromechanical performance. In order to develop an effective procedure to optimize the performance of a hybrid actuation system (HYBAS), a theoretical model has been developed, based on the elastic and electromechanical properties of the materials utilized in the system and on the configuration of the device. The model also evaluates performance optimization as a function of geometric parameters, including the length of the HYBAS and the thickness ratios of the constituent components. The comparison between the model and the experimental results shows a good agreement and validates the model as an effective method for the further development of high performance actuating devices or systems for various applications.

The Focke Helicopter

1938 ◽  
Vol 42 (331) ◽  
pp. 577-590 ◽  
Author(s):  
H. Focke
Keyword(s):  
Considerable Time ◽  
Successful Solution ◽  
New Type ◽  
Aeronautical Science ◽  
Further Development

The Focke helicopter presents the first successful solution of a problem which has occupied aeronautical science for a considerable time. Details of the record flights carried out last year caused a world sensation and with further development it is not too much to hope that this new type will open up fresh fields which up to now remained closed to orthodox aircraft.

Review of global and China's policies on fish passages

Water Policy ◽  
2019 ◽  
Vol 21 (4) ◽  
pp. 708-721 ◽  
Author(s):  
Ang Chen ◽  
Jingya Wen ◽  
Miao Wu ◽  
Pengyuan Wang
Keyword(s):  
Local Governments ◽  
Critical Issue ◽  
Fish Passage ◽  
Freshwater Ecosystems ◽  
Watershed Scale ◽  
Adverse Impacts ◽  
Foreign Countries ◽  
The World ◽  
Further Development ◽  
Operation And Management

Abstract Fish migrate up and down streams for reproduction in both sea and freshwater ecosystems over their life cycle. Over the last decades, fish passages have been provided to mitigate the adverse impacts induced by barriers. However, what is the proper type of fish passage and how to guarantee the effectiveness of operation are still under discussion. In this paper, global and China's policies on fish passages are reviewed. The development and main contents of relevant instruments are analyzed. The similarities and differences between China and foreign countries are compared, and issues in the fish protection and fish passages' management in China are identified. The results show that global policies on fish passages varied from local governments to continents. The design, operation, and management of fish passages are popular throughout the world. Duplication of authorities' responsibilities is the most critical issue in China. The paper recommends implementing a plan of environmental protection at watershed scale, and strengthening the monitoring of fish passages' operation and management. Further development directions of policies on fish passages' management have been proposed. The paper may help facilitate national policies on fish passages by integrating the effective measures of global experience.

Sign in / Sign up

Export Citation Format

Share Document