Anatase porous titania nanosheets for resonant-gravimetric detection of ppb-level NO2 at room-temperature

The Analyst ◽  
2021 ◽  
Author(s):  
Jialin Yang ◽  
Ding Wang ◽  
Ming Li ◽  
Haitao Yu ◽  
Pengcheng Xu ◽  
...  
Keyword(s):  
Public Health ◽  
Environmental Protection ◽  
Room Temperature ◽  
Trace Level ◽  
Porous Titania

The trace-level detection to harmful NO2 gas at room-temperature is very important for environmental protection and public health. This paper reports the resonant-gravimetric detection of ppb-level NO2 at room-temperature using...

scholarly journals Recent advances on the removal of dyes from wastewater using various adsorbents: A critical review

2021 ◽  
Author(s):  
Soumi Dutta ◽  
Bramha Gupta ◽  
suneel Kumar srivastava ◽  
Ashok Kumar Gupta
Keyword(s):  
Public Health ◽  
Environmental Protection ◽  
Health Problem ◽  
Critical Review ◽  
Public Health Problem ◽  
Dye Wastewater ◽  
Recent Advances

The rapid increase of toxic dye wastewater generated from various industries remains a severe public health problem and of prime environmental protection concern. Therefore, it has imposed a major challenge...

scholarly journals A Novel Trace-Level Ammonia Gas Sensing Based on Flexible PAni-CoFe2O4 Nanocomposite Film at Room Temperature

Polymers ◽  
2021 ◽  
Vol 13 (18) ◽  
pp. 3077
Author(s):  
Rima D. Alharthy ◽  
Ahmed Saleh
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Oxidative Polymerization ◽  
Portable Devices ◽  
Trace Level ◽  
Humidity Effect ◽  
Sensor Performance ◽  
Wearable Electronic ◽  
Relative Humidity Effect

In this study, we developed a new chemi-resistive, flexible and selective ammonia (NH3) gas sensor. The sensor was prepared by depositing thin film of polyaniline-cobalt ferrite (PAni-CoFe2O4) nanocomposite on flexible polyethylene terephthalate (PET) through an in situ chemical oxidative polymerization method. The prepared PAni-CoFe2O4 nanocomposite and flexible PET-PAni-CoFe2O4 sensor were evaluated for their thermal stability, surface morphology and materials composition. The response to NH3 gas of the developed sensor was examined thoroughly in the range of 1–50 ppm at room temperature. The sensor with 50 wt% CoFe2O4 NPs content showed an optimum selectivity to NH3 molecules, with a 118.3% response towards 50 ppm in 24.3 s response time. Furthermore, the sensor showed good reproducibility, ultra-low detection limit (25 ppb) and excellent flexibility. In addition, the relative humidity effect on the sensor performance was investigated. Consequently, the flexible PET-PAni-CoFe2O4 sensor is a promising candidate for trace-level on-site sensing of NH3 in wearable electronic or portable devices.

Porous Titania with Heavily Self-Doped Ti3+ for Specific Sensing of CO at Room Temperature

2013 ◽  
Vol 52 (10) ◽  
pp. 5924-5930 ◽  
Author(s):  
Juan Su ◽  
Xiao-Xin Zou ◽  
Yong-Cun Zou ◽  
Guo-Dong Li ◽  
Pei-Pei Wang ◽  
...  
Keyword(s):  
Room Temperature ◽  
Porous Titania

DEVELOPING A GIS-BASED INFORMATION MANAGEMENT SYSTEM FOR ON-SITE WASTEWATER TREATMENT FACILITIES

2008 ◽  
Vol 18 (04) ◽  
pp. 503-513 ◽  
Author(s):  
SHUNFU HU ◽  
JIANPENG ZHOU
Keyword(s):  
Public Health ◽  
Wastewater Treatment ◽  
Environmental Protection ◽  
Information Management ◽  
Management System ◽  
Spatial Information ◽  
Information Management System ◽  
The United States ◽  
Management Tool ◽  
Treatment Facilities

On-site wastewater treatment facilities (WWTFs) collect, treat, and dispose wastewater from dwellings that are not connected to municipal wastewater collection and treatment systems. They serve about 25% of the total population in the United States from an estimated 26 million homes, businesses, and recreational facilities nationwide. There is currently no adequate coordinated information management system for on-site WWTFs. Given the increasing concern about environmental contamination and its effect on public health, it is necessary to provide a more adequate management tool for on-site WWTFs information. This paper presents the development of an integrated, GIS-based, on-site wastewater information management system, which includes three components: (1) a mobile GIS for field data collection; (2) a World Wide Web (WWW) interface for electronic submission of individual WWTF information to a centralized GIS database in a state department of public health or state environmental protection agency; and (3) a GIS for the display and management of on-site WWTFs information, along with other spatial information such as land use, soil types, streams, and topography. It is anticipated that this GIS-based on-site wastewater information management system will provide environmental protection agencies and public health organizations with a spatial framework for managing on-site WWTFs and assessing the risks related to surface discharges.

scholarly journals DTA/TG analysis of mechanochemicaly activated sodium carbonate

2021 ◽  
pp. 47-55
Author(s):  
Nataša Đorđević ◽  
Slavica Mihajlović ◽  
Gvozden Jovanović ◽  
Branislav Marković
Keyword(s):  
Carbon Dioxide ◽  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Relaxation Time ◽  
Environmental Protection ◽  
Sodium Carbonate ◽  
Room Temperature ◽  
Tg Analysis ◽  
Relaxation Period ◽  
Sorption Characteristics

Sodium carbonate is a material that is very good sorbent of carbon dioxide from the atmosphere, and it is a reason of it is increasing importance in environmental protection. In order to improve it is sorption characteristics, activation of Na2CO3 was performed by mechanochemical procedure and monitoring of changes during the relaxation time. This research is based on differential thermal analysis with thermogravimetry, in order to determine the changes that occurred on the activated samples during the relaxation period under controlled conditions. Sodium carbonate was activated for 2 and 7 minutes in a vibro mill, and then the activated samples were deposited in at room temperature and atmosphere of carbon dioxide at a humidity of 95% for 96h.

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