Madushika Sewwandi

University of Sri Jayewardenepura · Ecosphere Resilience Research Center

Abundance of buried microplastics in sand profiles and pellet pollution index at Sarakkuwa beach, at west-coast of Sri Lanka was studied as a case study due to the receival of plastic nurdles and debris from the MV X-Press Pearl ship disaster in May 2021. Sand collected at 7 locations to a depth of 2 m in different depths for a beach segment of 200...

The objectives of the research was to assess the coastal pollution by plastic nurdles, pyrolitic debris, associated potential toxic elements (PTEs) concentrations and mitigatory efforts by the worst ever maritime accident of a chemical and plastic boarded container vessel; MV X-press Pearl. Field sampling was carried out three times during May, Jun...

Microplastics has become a global concern due to their ubiquitous presence which poses unavoidable human exposure risks. Geographical distribution and yearly trends of research on microplastics, food, and beverages do not exist. Thus, no overall account is available regarding the presence of microplastics and plastics-associated contaminants in foo...

Microplastics act as a vector for toxic trace metals and their surface complexation mechanisms under different environmental conditions are poorly understood. The present study evaluates the interaction mechanisms of pristine and aged polyethylene (PE) microplastics with Pb²⁺ in water environments in the presence of NaNO3 and humic acid (HA). The i...

Microplastics can act as a vector to transport various organic and inorganic contaminants. Hydrophobic and hydrophilic organic contaminants tend to bind to microplastics due to their hydrophobicity and high surface area to volume ratio. Recent studies have focused their attention on evaluating the ability of microplastics to bind potentially toxic...

Microplastics and caffeine co-occur in wastewater due to their vital usage. The hydrophobicity of microplastics enriches their potency to interact with caffeine in water, however studies on vector transportation of microplastic-bound caffeine is still in its infancy. Therefore, caffeine adsorption to pristine and aged polyethylene (PE) microplastic...

Endocrine-disrupting chemicals (EDCs) such as natural estrogens, bisphenol A, and nonylphenol are widely spread in the environment due to improper waste disposal. Emergence of EDCs mainly occurs from widely used consumer products like pharmaceuticals, personal care products, plastic preservatives, pesticides, and industrial lubricants. Both acute a...

The sorption medium plays a vital role in vector transport of microplastics bound metal ions. The influence of soapy water on transportation of microplastics bound Cr(VI) and sorption mechanisms are still not clear. Therefore, in the present study the performance of pristine and aged polyethylene (PE) microplastics to adsorb Cr(VI) in soapy water w...

Background: Microplastics are lightweight materials, and found ubiquitously in the aquatic environment due to the discharge of primary and secondary plastics. Pb2+ is a common micropollutant found in water discharged from wastewater from industries, service stations, and landfill leachate. Thus, microplastics are considered as a vector to transport...

Diclofenac Sodium is a commonly used electro-active anti-inflammatory drug. There are various analytical techniques to detect Diclofenac Sodium active ingredient including cyclic voltammetry. Cyclic voltammetry was used with different kinds of modified electrodes. In this project, drug release action of Diclofenac Sodium is detected by introducing...

Diclofenac sodium is a commonly used anti-inflammatory delayed released drug. Determination of delayed release behavior of diclofenac sodium by using easy technique in the industry is very important because from that the quality of bi-layered coat design can be checked out easily. There are various techniques for detection of diclofenac sodium acco...

Docosahexaenoic acid (DHA) and Eicosapentaenoic acid (EPA) are the most popular health beneficial omega-3 fatty acids which are mainly isolated from marine fish oils. DHA and EPA are commonly used as nutritious ingredients of several infant food products. Of these products, DHA containing multivitamins are very popular as supplements for pregnant o...

This poster consists of the experimental data of the development and validation of an effective and efficient UV spectroscopic in-house method to determine DHA/EPA level as a mixture in soft gelatin capsule medicament.