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0067. Calculation of Half-Life for Toxic Substances in Atmospheric Air (Ecological Calculator)
An interactive calculation document for the automated determination of the half-life of pollutants in atmospheric air based on the kinetics of the first order of decay. Ecological calculator with open formulas in the TechEditor environment.
This digital product is a specialized calculation document designed for ecologists, atmospheric air protection specialists, public health risk assessment specialists, state inspectors and students of environmental specialties.
The solution makes it possible to determine the half-life of toxic substances in the atmosphere — the time during which the concentration of the pollutant is halved. This is critically important for predicting the duration of pollution after emergency releases, planning evacuation measures, and assessing the natural self-cleaning of the atmosphere.
Unlike manual calculations, changing any input parameter (initial concentration, final concentration, observation time) automatically updates all results — decay rate constant and half-life. After that, a decay graph is automatically generated.
Automated Checks & Analysis
The product automates the analysis of the dynamics of atmospheric pollution:
- Decay rate estimation: Calculation of the decay rate constant λ based on experimental monitoring data
- Prediction of self-cleaning: Determining the half-life to estimate the duration of exposure to a pollutant
Features & Document Logic
1. Input data. You enter the observation time t (hours), the initial concentration C₀ (mg/m³), and the concentration C after time t (mg/m³).
2. Algorithm: The system performs the calculation in two stages:
- Calculation of the decay rate constant
- Determination of half-life
3. Visualization. Automatic graph generation.
In this digital solution, all formulas are visible. You can see the calculation process, the decay constant, and the half-life in real time. The program automatically checks the validity of the input data and alerts you to any potential errors.
Technical Specifications & Standards
File Format: .tec (TechEditor Project).
Document Language: Ukrainian (Technical).
Output: On-screen review, report printing, export to PDF, RTF, DOCX, or image.
How to Use This Solution
- Download and install TechEditor on your computer (you must be registered in the Dystlab Store).
- Download this digital solution (.tec file).
- Open the file on your computer.
- Modify the input data. Ensure all calculations in the document update automatically (if auto-calculation is off, press F5 for a manual recalculation).
Download
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28.03.2026 ver. 1
- first release;
- tested in TechEditor 5.7.2;
System requirements for TechEditor environment
Operating system:
- Windows (recommended 11 or higher);
- macOS (12.0 or higher) — through the Parallels Desktop emulator;
Monitor, memory, processor:
- screen resolution: recommended 1920x1080 pixels and higher; minimum 1366x768 pixels;
- RAM: 8 GB and above is recommended; minimum 1 GB;
- Hard drive (HDD/SSD): 500 MB and above recommended; minimum 100 MB;
- processor frequency (CPU): 3.0 GHz and higher is recommended; minimum 1.0 GHz.
Browser and Internet access:
Internet access is required and is used for user web authorization, web content downloads, communication with LLM, and other functions.
Dystlab Open Collaborative License
These digital solutions are provided “as is”, without any warranties of any kind, express or implied, including but not limited to warranties of accuracy, completeness, fitness for a particular purpose, or compliance with any standards or regulations. The developers, authors, and participating organizations shall not be liable for any direct, indirect, incidental, consequential, or other damages arising from the use or inability to use these solutions.
Permission is hereby granted to use, copy, reproduce, distribute, modify, adapt, and create derivative works of these digital solutions without restriction.
It is prohibited to sell, license, rent, lease, or otherwise commercially distribute these digital solutions as a standalone product, whether in their original or modified form, in exchange for monetary compensation.
At the same time, the use of these solutions as part of commercial projects, engineering works, research activities, or services is expressly permitted, provided that the solutions themselves are not the primary object of sale, licensing, or rental.
This license is intended to support open science, engineering practice, and the free exchange of knowledge, while preventing unauthorized commercial exploitation of the digital solutions as independent products.
[en] Please share your impressions of this product. If you have any questions, join our Discord server or send us an email.
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[ua] Будь ласка, поділіться своїми враженнями про цей продукт. Якщо маєте питання, долучіться до нашого Discord-серверу або напишіть нам email.
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[ua] Будь ласка, поділіться своїми враженнями про цей продукт. Якщо маєте питання, долучіться до нашого Discord-серверу або напишіть нам email.
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[en] Please share your impressions of this product. If you have any questions, join our Discord server or send us an email.
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[ua] Будь ласка, поділіться своїми враженнями про цей продукт. Якщо маєте питання, долучіться до нашого Discord-серверу або напишіть нам email.
---
[ua] Будь ласка, поділіться своїми враженнями про цей продукт. Якщо маєте питання, долучіться до нашого Discord-серверу або напишіть нам email.
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