http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/13395 Mon, 27 Apr 2026 00:31:19 GMT 2026-04-27T00:31:19Z http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/8513 Identification of the Existence of Micro Plastic in Turag River Chowdhury, Sayma In recent times microplastic pollution in freshwater has turned into a devastating form. In the present study, we investigated the existence of microplastic from the Turag River in 2021. The study has been used three sediments samples and three surface water samples. The study has been used one of the most visited and populated spots of the Turag river area that is the boro Bazar ghat area. The first sample was been taken directly from the boro Bazar ghat area and the other two samples were taken from 500 meters north of boro Bazar ghat and 500 meters south of boro Bazar ghat. After collecting the sample, the sample was examined in our lab where we have used KOH for making digestion of organic matters and after that, the microplastic was identified with the help of a microscope and bare eyes, the size of the particle was not identified in this study but we have successfully identified 2 types of microplastics. One is the particle of microplastic another is a filament of microplastics. The microplastic we have identified in this study has shown the characteristics and color with which we could identify the microplastic sample. Then the study made a comparison between the results found in the Turag River with the result from other rivers throughout the world. The study has compared both results and concluded that the microplastic which we have identified was quite similar with other microplastic with has been identified worldwide other rivers. Mon, 03 Jan 2022 00:00:00 GMT http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/8513 2022-01-03T00:00:00Z http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/8512 Impact of Plastic Packaging and Short-term Plastic Usability on Environment Talukder, Tasnia Tasnim The use of one-time plastics is growing at an unusual rate. Plastic products that are no longer used or discarded after use are known as one-time plastics. Many types of onetime plastic products are now easy to catch. These include plastic cups, spoons, straws, plates, glasses and many more types of one-time plastic products. These one-time plastic products are mostly coming from places like restaurants, residential hotels, airlines, super shops, tea shops and special events. The use of plastic is essential today because of our daily survival. Polymer is being used as an alternative material in every field of life. Plastic is being used as an alternative to everything from carry bags to medicine bottles, food containers to flower tubs - whether its burlap bags or glass vials or porcelain dishes or earthen tubs. Due to lack of awareness among the common people, they are throwing away the used plastic materials Since the plastic material does not mix with the soil, some of it is not recyclable, so it is gradually accumulating as waste in the local bosom. And pollution is spreading from that. Burning polymer materials is even more dangerous, as hydrocarbons are released into the air, increasing the level of pollution. About 50 percent of the total plastics produced at present are disposable. In 1990, the amount of plastic used in Bangladesh was only 15,000 metric tons whereas in 2018 it has increased to 1200000 metric tons. The country currently imports about 8 lakh metric tons of raw materials for making plastics. Less than 20 percent of recycled plastic is now being used to make plastic products in Bangladesh. Observations, interviews and questionnaire analysis show that the plastics we use and leave behind in the open are creating barriers in various fields on the one hand and increasing environmental and health risks on the other. This article focuses on eco-friendly processing methods and the proper use of manufactured products as well as the various stages of processing and environmental and health awareness. Finally, we made some recommendations on how to reduce the use of single-use plastic and recent status of biodegradable plastic items manufacturing industries in Bangladesh. Sun, 30 Jan 2022 00:00:00 GMT http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/8512 2022-01-30T00:00:00Z http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/5732 Impact of Water Salinity on Local Plant Diversity of the Sangu River Estuary Zone, Chattogram Chy., Rafiul Azad Bangladesh is a deltaic land with hundreds of rivers. Many of them flow through and fall into the Bay of Bengal. Changing climate leads to the SLR and rising sea level causes the salinity in river water. The increasing salinity of river water directly affects the local ecosystem and plant diversity. In this study, we tried to assess the status of water salinity and existing plant diversity of the Sangu river of Chattogram. We also tried to observe the impact of water salinity on the local plant diversity of the Sangu river. In order to meet with the objectives, we directly measured the water salinity in eleven (11) sampling locations, we collected plant diversity information from all sampling locations and estimated the status of plant diversity using both Simpson (D) and Shannon (H) Diversity Index Formula. Then statistically we observed the impact of salinity on the plant diversity on the riverside. We also collected water samples from sampling locations to measure the level of TDS and EC of the river water. We conducted our data from Kodom Rosul to Rasulabad of the Sangu river. In the study area, the highest salinity (10 ppt) was found in Kodom Rosul (transition point of Sangu river with the Bay of Bengal). In the upstream zone, salinity gradually decreases (10 ppt to 1 ppt) from Kodom Rosul to Majhir-ghat. We observed almost zero salinity level in the river water of the upstream zone. The salinity level remains the same throughout the upstream zone. In the study area, the plant diversity value of both indexes increases with the increase of distance from the Kodom Rosul to Rasulabad. The range of plant diversity value is D = 3.906 to 9.434 and H = 1.467 to 2.309. All values of plant diversity are almost the same and close to each other. The highest plant diversity was also estimated in Rasulabad, D = 9.434 and H = 2.309. From the statistical analysis of all the findings above, we reach into a conclusion that in the downstream zone, as salinity increases, plant diversity tends to decrease towards the Bay of Bengal. Mon, 15 Feb 2021 00:00:00 GMT http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/5732 2021-02-15T00:00:00Z http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/5698 Analysis of the Current State of Water Salinity and Its Effect on the Local Plant Diversity of the Bakkhali River, Cox’s Bazar Mahmud, Shehab Climate change has led to an unprecedented rate of sea-level rise (SLR) over the past few years. With hundreds of rivers flowing through the region, Bangladesh is a deltaic plain. Most of them end their journey by accumulating in the Bay of Bengal (BoB). The rising sea level tends to increase river salinity due to the changing climate, which directly affects the associated ecosystems and vegetation coverage. During the COVID-19 pandemic in the monsoon season, this research was conducted. The study evaluates the current plant diversity and river salinity status of Cox's Bazaar's Bakkhali River, which concluded in a hypothesis on how the local plant-diversity is affected by the river salinity. On site, the water salinity level was measured. The estimated plant diversity status was measured using the diversity index for both Simpson (D) and Shannon (H). Statistical analysis was carried out on the results of the impact of river salinity on the plant diversity of the riverside. From the water samples collected from the sampling locations, total dissolved solids (T DS) and electrical conductivity (EC) were measured. From all the statistical research it was found that when salinity increases, the plant diversity decreases. There were less human footprints because of the pandemic. Also the salinity level was lower than expected due to the monsoon season. Via physical observation, it was shown that pollution had less effects. Thu, 31 Dec 2020 00:00:00 GMT http://dspace.daffodilvarsity.edu.bd:8080/handle/123456789/5698 2020-12-31T00:00:00Z