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All Journal Planta Tropika Journal of Advanced Technology and Multidiscipline (JATM)
Ansari, Abu Saad
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Electrical & Electronics Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Analyzing the Formation of Nanobubbles and its Effect on the Stability of Dissolved Oxygen in Water Fitriani, Mita; Nugroho, Fairuz Gianirfan; Rochman, Nurul Taufiqu; Ansari, Abu Saad
Journal of Advanced Technology and Multidiscipline Vol. 4 No. 1 (2025): Journal of Advanced Technology and Multidiscipline
Publisher : Faculty of Advanced Technology and Multidiscipline Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jatm.v4i1.71660

Abstract

Nanobubbles (NB) have attracted many researchers due to their unique characteristics, one of which is increasing the amount of dissolved oxygen (DO) in liquids, making them a promising technology for various applications, such as water treatment and aquaculture. This study investigates the generation of NBs using a custom-designed cartridge nozzle and evaluates their effectiveness in sustaining elevated DO concentrations. Experiments were carried out under a controlled gas pressure of 400 N/m2 comprising a 30-minute active phase with the generator turned on, followed by a 30-minute passive phase with the generator off, to assess NB formation and stability. The results showed that smaller nanobubbles had higher stability, allowing dissolved oxygen to stay longer in the water. Particle size analysis revealed the production of uniformly distributed NBs averaging approximately 600 nm, which remained structurally stable even after gas input ceased. During the active phase, DO levels increased sharply, peaking at 28.51 mg/L by the 10th minute. Although a gradual decline was observed after pressurization stopped, DO levels remained significantly higher than baseline, indicating the prolonged oxygen retention capability of NBs. This performance is attributed to the slow dissolution kinetics, high zeta potential, and favorable interfacial interactions of the bubbles. Overall, the cartridge nozzle-based method demonstrates strong potential for applications in water treatment, aquaculture, and other processes requiring efficient and sustained oxygen delivery.
Effect of ZnO-NPs Enhanced Vermicompost (NEV) on the Growth, Leaf Nutrient Content, Yield, and Tomato’s Quality (Solanum lycopersicum) Nurhidayati, Nurhidayati; Qur’ania, Anita; Widowati; Ansari, Abu Saad
PLANTA TROPIKA Vol. 14 No. 1 (2026)
Publisher : Department of Agrotechnology, Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/pt.v14i1.26713

Abstract

Zinc oxide nanoparticles (ZnO-NPs) can be used as nanofertilizers and nanogrowth regulators to enhance plant agronomic performance. Nevertheless, far too little interest has been paid to the impacts of ZnO-NPs integrated with vermicompost in horticultural crop cultivation. This study investigated the effects of ZnO-NP-enhanced vermicompost (NEV) on the growth, leaf nutrient content, yield, and quality of tomato plants. A controlled greenhouse experiment was conducted, in which tomato plants were subjected to various treatments, including application of NEV combined with various doses of ZnO-NPs via direct soil and foliar spray, compared with control, NPK fertilizer, and vermicompost. The results showed that direct soil application of NEV positively affected tomato leaf growth and NPK content. This enhanced nutrient uptake contributed to increased tomato yield. The direct soil application of NEV (ZnO 50 mg kg-1) increased the tomato fruits (315% and 183%) and the fresh weight of tomato fruits (344% and 197%) in comparison to the control and NPK fertilizer. Additionally, the study demonstrated that applying NEV not only increased yield but also increased the vitamin C content of tomatoes. The findings highlight the potential of this innovative agricultural approach as a sustainable means to enhance tomato production.
Co-Authors Fitriani, Mita Nugroho, Fairuz Gianirfan Nurhidayati Nurhidayati Nurul Taufiqu Rochman Qur’ania, Anita WIDOWATI