Wang, et al (2024) BiocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More assists phytoremediationThis is a technique that uses plants to clean up contaminated soil or water. Biochar can enhance phytoremediation by improving soil conditions and promoting plant growth, allowing plants to absorb and break down pollutants more effectively.   More of cadmium by regulation of rhizosphere microbiome in paddy fields. Environmental Technology & Innovation. https://doi.org/10.1016/j.eti.2024.103757

Cadmium (Cd) pollution in paddy fields poses a significant threat to ecosystems and food safety. Traditional phytoremediation methods, using plants to absorb and remove pollutants, often face challenges such as low efficiency and adverse effects on plant growth. However, a recent study has demonstrated that the addition of biochar, particularly moss-derived biochar, can significantly enhance the efficiency of phytoremediation.

Biochar is a carbon-rich material produced from organic matter through pyrolysisPyrolysis is a thermochemical process that converts waste biomass into bio-char, bio-oil, and pyro-gas. It offers significant advantages in waste valorization, turning low-value materials into economically valuable resources. Its versatility allows for tailored products based on operational conditions, presenting itself as a cost-effective and efficient More. In this study, researchers created biochar from moss (Brachythecium plumosum) and incorporated it into Cd-contaminated paddy fields. The biochar not only improved plant growth but also increased the Cd removal rate. For example, the biochar-treated plants, Solanum nigrum and Echinochloa crus-galli, showed an increase in Cd removal efficiency from 11-15% to 23-35% after 60 days.

The enhanced efficiency is attributed to several factors. Firstly, the biochar improved the physical and chemical properties of the soil, making it more conducive to plant growth. Secondly, the biochar increased the number and diversity of beneficial rhizosphere bacteria. These bacteria play crucial roles in nutrient cycling, stress tolerance, and biofilm formation, which collectively improve plant health and Cd absorption.

Additionally, the biochar-treated soils showed higher levels of organic matter and enzyme activities, further enhancing soil fertility and plant growth. The study highlights that biochar can be a valuable addition to phytoremediation strategies, offering a sustainable and cost-effective solution to combat soil pollution and improve agricultural productivity. However, the application of biochar should be tailored to specific soil conditions to maximize its benefits.