The mineralization of acidic aqueous solutions with 0.166 to 1.333 mM Crystal Violet (CV) in 50 mM Na2SO4, as background electrolyte has been studied by the electro- Fenton method, where the oxidizing hydroxyl radicals were produced from the Fenton reaction between added ferrous ions and hydrogen peroxide generated at a oxygen- diffusion cathode. The influence of six operating factors on the mineralization degree has been investigated: anode material (platinum versus boron doped diamond), pH, Fe (II) dose, current intensity, temperature and initial concentration of CV. The mineralization degree had a maximum (91.18%) after 420 minutes of electrolysis, under the following optimal conditions: boron doped diamond (BDD) anode, pH3, 1mMFe (II), 300 mA, 308 K, and 100 ppm initial total organic carbon (TOC).

Unmanned weather stations play an essential role in the effort to analyze and predict the world's ever-changing weather patterns. The unmanned stations, based on sensors investigation, collect large amounts of weather data and then download the data in real time to a back-end host for analysis and long-term storage. When a monitoring, control and data storage application involves the presence of the sensors and actuators on a large area, the distributed input-output systems FieldPoint, offer an integrated, modulated and economical solution for industrial use. This paper presents a possibility of using FieldPoint module in the weather forecasting.

Flexible and programmable components have been playing a key role in many electronic systems. Lidar systems can be improved by means of component and electronic progress, especially in data collection, acquisition and processing. The objective of present paper is to show the design of an electronic unit capable of substituting Raman lidar - based discriminator and multichannel scaler. For this experiment, a Hamamatsu H7732P-01 photomultiplier has been used.

Environmental regulators must have confidence in the complete measurement sequence: from sample point to measurement report. Thus, they need to be confident not only in the measurement instruments that acquire the data but also in the data management software that processes, stores, and prepares reports. This paper describes a new data management software standard for the UK Environment Agency’s MCERTS scheme, which hitherto has only covered instruments. Our approach divides the standard into three parts: the generic quality of the software, which is not addressed here, because it concerns software engineering; the generic features of data management; and the application-specific features, referred to here as the ‘sector standard’. We focus on generic data management: the need for a mathematical specification of any signal processing and calibration; auditability and traceability; and reporting. We have used the standard to conduct audits of data management products; these audits and feedback from diverse industrial bodies who have reviewed the standard, together indicate that it is appropriate for the certification of environmental data management applications.

The article presents an embedded solution for the measurement of air parameters such as flow direction, flow velocity, temperature and relative humidity. The air flow velocity and direction measurement is based on a solid state sensor expressed by a set of ultrasound transmitters-receivers disposed according to the main cardinal points. 40kHz ultrasound burst signals are emitted from one cardinal point transmitter and received from the opposite cardinal point receiver whose conditioning circuit delivers a TTL pulse. The widths of the pulses obtained by the receivers are used not only to calculate air flow velocity and direction but also the temperature. Signal multiplexing, the trigger pulse generation, pulse width measurement and data acquisition associated with an additional relative humidity sensing channel are performed by a microcontroller (PIC18F452). The digital values associated with the measuring channels are transmitted using an ER400TRS RF wireless module that permits a point to point connection between the RS232 ports of the microcontroller and a host PC where the advanced processing and data publishing is carried out.