Akademik Veri Yönetim Sistemi
3RD INTERNATIONAL ENVIRONMENTAL CHEMİSTRY CONGRESS (ENVİROCHEM 2021), Antalya, Türkiye, 1 - 04 Kasım 2021, ss.15
Iron nanoparticles are preferred due to their unique physical and chemical properties in recent years.1-2
Nanoparticles can be synthesized with physical, chemical and green methods.3-4 Nanoparticles that is synthesized
by physical and chemical methods; are so expensive, have high toxicity and cause negative and deadly effects on
the environment and microorganisms. Therefore, the interest in green synthesis is increased.5-6 Nanoparticles
produced by green synthesis, on the other hand, are a cheap, fast, and easy method with low toxicity, completely
natural, ecosystem friendly and easily produced without the need for various operating parameters such as
temperature, high pressure, energy.5-6-7
In green synthesis, nanoparticles are produced by using various
reductants such as bacteria, plants, algae, yeast, fungi, microalgae and diatoms.2 Photochemicals play an active
role through plant in the green synthesis method. The reducing or antioxidant compounds in the root, fruit, leaf,
seed of the plant are responsible for the reduction of metal compounds.4-5 Chemicals found in the plant are
reducing agents such as amino acids8
, sugar7
, citric acids, phenols, flavonoids, vitamins, heterocyclic compounds.9
The aim of this study is to produce and characterize nanoparticles that is green, easy, cheap, sustainable,
environment- friendly, waste-preventing, and less harmful that minimizes harmful by-products using black tea
waste pulp. The synthesized nanoparticles will then be used in environmental engineering approaches. In green
synthesis, black tea pulp waste was preferred with the aim of recycling waste that is frequently used in Turkey as
a drink. Black tea is a good antioxidant and a reducer such as phenols, amino acid, flavonoids, proteins.10
This study consists of two stages. In first stage of study, waste tea pulp was brew under circumstance 1h and 80°C.
Secondly, 1:1 complex solution (Fe-extract) was created and mixed for 2 hours. At this stage, the extract pH was
reduced to 3,88 from 5,33 right away and the color changed from golden to black immediately, after nanoparticles
production. This is a condition that indicates a reduction in iron ions.4 The green synthesized iron nanoparticles
were characterized using SEM, Fe-SEM, FTIR, DLS, BET, UV-VIS spectrophotometer, EDX, XRD, Zero Point Charge,
Zeta Potential. In SEM images, the size average value was found as <100 nm. In Fe-SEM images, it was observed
that the iron particles are in the form of cubes. Absorption peaks at wavelength of 200 nm and 270 nm. Colloid
stability was determined as relatively stable at -11.7.