scholarly journals Study on treatment of pesticides-containing wastewater by model combining of the pre-biotreatment and photocatalytic TiO2

2020 ◽  
Vol 4 (4) ◽  
pp. First
Author(s):  
Ho Truong Nam Hai ◽  
Nguyen Ly Sy Phu ◽  
To Thi Hien
Keyword(s):  
Water Pollution ◽  
Biological Process ◽  
Organophosphate Pesticides ◽  
Endosulfan Sulfate ◽  
Treatment Efficiency ◽  
Current Period ◽  
Model Combining ◽  
Increasing Demand ◽  
Current Concerns ◽  
Photocatalytic Tio2

In the current period, with the development of economy, science, and technology, people's lives have been improved, leading to increasing demand for water use. Thus, one of the main current concerns is the increased pollution of surface water and groundwater. Especially water pollution by pesticides is a serious problem. In this study, the wastewater treated system, which is including the aerobic biological process and photocatalytic TiO2, used to evaluate the effective treatment of pesticides. Self-generated wastewater was added by a group mixed 8 types of Organochlorine pesticides (OCPs): Tetrachloro-m-xylene,b -HCH,d - HCH, Heptachlor – epoxide, 4,4'- DDE,b -Endosulfan, Endrin – aldehyde, Endosulfan – sulfate and 5 types of Organophosphate pesticides (OPPs): Diazinon, Malathion, Parathion, Ethion, Trithion. The results showed that the COD removal efficiency was over 89,09% for the whole system when maintaining the load of 0,78 kgCOD/m3. day, total retention time was 16 hours. Five types of OPPs was thoroughly treated after going through the system based on its easily biodegradable. For OCPs, the treatment efficiency through the biological process is not high, 6/8 types about 5 - 27% but through photocatalytic TiO2/UV, the treatment efficiency increased 67 - 100% for each type. The results obtained in the study show that the use of the method of combining biology and AOPs is effective for wastewater difficult to treat as pesticides.

scholarly journals Evaluation of the effect of regional collaborative management of water pollution in Nanjing-Zhenjiang-Yangzhou metropolitan area based on grey theory

2021 ◽  
Vol 257 ◽  
pp. 03009
Author(s):  
Zhicheng Jin ◽  
Ruxuan Li ◽  
Nanxi Zheng
Keyword(s):  
Water Pollution ◽  
Metropolitan Area ◽  
Indicator System ◽  
Current Situation ◽  
Collaborative Management ◽  
Grey Theory ◽  
Clustering Model ◽  
Model Combining ◽  
Pollution Management ◽  
Water Pollution Management

This paper mainly focuses on the current situation of collaborative water pollution management in the Nanjing-Zhenjiang-Yangzhou Region metropolitan area. For this purpose, a synthetical, innovative and more comprehensive indicator system, based on PSR theory and the degree of regional synergy, which is also suitable for further evaluations towards regional collaborative water pollution management, was constructed by analyzing the existing theories and programs of collaborative regional management. The indicator weights are determined by fuzzy hierarchical analysis. The current situation of water pollution cooperative management in Nanjing-Zhenjiang-Yangzhou metropolitan area is evaluated as good with a probability of 0.9453 in the third grey class by a grey clustering model combining the data from the annual environmental bulletin of the Environmental Protection Bureau of the three cities and 2018 Nanjing Yearbook etc. Finally, several policy suggestions are given.

scholarly journals Treatment of pesticide intermediate industrial wastewater using hybrid methodologies

2021 ◽  
Vol 11 (3) ◽  
Author(s):  
Sindhu Akinapally ◽  
Bhagawan Dheeravath ◽  
Kiran Kumar Panga ◽  
Himabindu Vurimindi ◽  
Srinivasulu Sanaga
Keyword(s):  
Water Pollution ◽  
Industrial Waste ◽  
Industrial Wastewater ◽  
Biological Treatment ◽  
Biological Process ◽  
Human Beings ◽  
Industrial Waste Water ◽  
Process Methodology ◽  
Electro Oxidation ◽  
Percentage Removal

AbstractAbatement of water pollution is being a major concern to be dealt with, as the scarcity of water for basic needs of human beings is increasing drastically. As a part of diminishing water pollution, treatment of industrial wastewater prior to disposal plays a paramount role. Due to the typical characteristics of pesticide, intermediate industrial waste water the treatment is also challenging issue. In this study three different sequential methodologies (Methodology-I: combined rotavapour distillation, fenton and anaerobic biological process, Methodology-II: combined rotavapour distillation, photo fenton and anaerobic biological process, Methodology-III combined coagulation, fenton, electro oxidation and anaerobic biological process) has been evaluated for the treatment of pesticide intermediate industrial wastewater. Among the three sequential methodologies opted in this study for the treatment of pesticide intermediate industrial wastewater, percentage removal of COD was 95% in methodology-1 (i.e. combined rotavapor distillation, fenton and anaerobic biological treatment).

The evolution of scientific journal articles in the periphery: a case study and analysis of the Raffles Bulletin of Zoology from 1928 to 2008

2012 ◽  
Vol 38 (5) ◽  
pp. 407-422 ◽  
Author(s):  
Hui Lin ◽  
Brendan Luyt
Keyword(s):  
Scientific Journal ◽  
Information Organization ◽  
Transitional Period ◽  
Communication Process ◽  
Journal Articles ◽  
Knowledge Domains ◽  
Current Period ◽  
Increasing Demand ◽  
Production Organization

In order to analyse the development of a scientific journal in the academic periphery, a case study of the Raffles Bulletin of Zoology (RBZ), published in Singapore 1928–2008, was conducted. A combination of quantitative and qualitative methods was deployed. Quantitatively, statistics on various aspects of journal articles in RBZ were collected and analysed. Qualitatively, schematic structures of journal articles in the RBZ were coded and documented via Swales’s move analysis. It was found that the development of the RBZ could be divided into three stages: a rudimentary period, transitional period and current period. Various factors that shaped the evolution of RBZ for the past 80 years are discussed, including the social and political context of Singapore, changes in scientific perspectives, the efforts of editors, information organization and retrieval, as well as changing scientific communities. It is argued that a longitudinal study of journal articles in the academic periphery enhances our understanding of: (1) the adaptive nature of knowledge production, organization, use and retrieval in various knowledge domains; (2) the importance of understanding the interplay between social factors in the scientific communication process; and (3) the increasing demand for the provision of efficient and effective information systems to meet the pressing need of information organization and retrieval.

Development of 200 kV Scanning-Transmission Electron Microscope

1974 ◽  
Vol 32 ◽  
pp. 410-411
Author(s):  
H. Koike ◽  
S. Sakurai ◽  
K. Ueno ◽  
M. Watanabe
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Scanning Transmission Electron Microscope ◽  
The Other ◽  
Morphological Observation ◽  
Magnetic Domains ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Backscattered Electron ◽  
Increasing Demand

In recent years, there has been increasing demand for higher voltage SEMs, in the field of surface observation, especially that of magnetic domains, dislocations, and electron channeling patterns by backscattered electron microscopy. On the other hand, the resolution of the CTEM has now reached 1 ∼ 2Å, and several reports have recently been made on the observation of atom images, indicating that the ultimate goal of morphological observation has beem nearly achieved.

The Evolution of an SLPA Program

2009 ◽  
Vol 10 (1) ◽  
pp. 4-11
Author(s):  
Susan Sparks ◽  
Lisa Van Horne
Keyword(s):  
The State ◽  
Online Discussions ◽  
Speech Language Pathology ◽  
Speech Language Pathologists ◽  
Assigned Reading ◽  
Language Pathology ◽  
Strict Compliance ◽  
Increasing Demand

Abstract There is an increasing demand for qualified individuals available in our profession. One answer to this crisis is to hire trained speech-language pathology assistants (SLPAs) to assist speech language pathologists (SLPs). Shoreline Community College's SLPA program was created in response to the shortage of fully trained SLPs. The program is designed in strict compliance with ASHA's guidelines (ASHA, 2004). Students attend lectures remotely, complete assigned reading, take quizzes, engage in in-class and online discussions, turn in assignments, and take exams without ever having to commute to the Shoreline campus. This allows students from across the state to complete their education while continuing to live and work in their communities.

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