In a groundbreaking study published in the journal *Nature Environment and Pollution Technology* (translated as *Nature Environmental and Pollution Technology*), researchers have uncovered a promising avenue for transforming garden waste into valuable pigments and paints, offering a sustainable alternative to conventional, oil-based products. The study, led by Gaurav R. Hanwatkar, Ganesh R. Kale, and Ratnadip R. Joshi, explores the potential of Syzygium cumini garden waste biochar as a source for eco-friendly pigments and paints, marking a significant step toward a circular economy in the construction and coatings industries.
The research team produced biochar from garden waste through a process called carbonization, which yields a material rich in desirable chemical and physical properties. “We found that the biochar derived from Syzygium cumini garden waste exhibits excellent color properties and stability, making it a viable candidate for pigment and paint formation,” said lead author Gaurav R. Hanwatkar. The study employed various extraction techniques to isolate pigments from the biochar, assessing their color properties, stability, and compatibility with paint formulations.
One of the most compelling findings was the superior color intensity of the Syzygium cumini biochar-based pigment compared to feed-derived pigments. Spectrophotometric analysis revealed that the biochar-based pigment retained its color and stability over time, indicating its potential for diverse applications in the paint and dye industries. “This research establishes the novelty of using biochar as a sustainable source for pigments, addressing the environmental concerns associated with commercial, oil-based products,” Hanwatkar added.
The implications of this research are far-reaching, particularly for the energy and construction sectors. By repurposing organic waste materials, the study offers a feasible solution to mitigate waste accumulation while creating value-added products. This aligns with the growing demand for sustainable and eco-friendly materials in the market. “Our findings contribute to the broader goal of developing green technologies that reduce carbon footprints and promote a circular economy,” said Hanwatkar.
The study’s insights provide a roadmap for future developments in the field, encouraging further exploration of biochar’s potential in various industrial applications. As the world shifts toward sustainability, innovations like this are crucial in driving the transition to greener practices. The research not only highlights the environmental benefits but also underscores the economic viability of utilizing biochar in the paint and dye industries.
In summary, the study led by Hanwatkar, Kale, and Joshi opens new avenues for sustainable material utilization, offering a glimpse into a future where garden waste is transformed into high-value products. This research is a testament to the power of innovation in addressing environmental challenges and paving the way for a more sustainable future.

