(RB@MgFeAlO4-NH2) magnetic composites using a one-step solvothermal method. They found that the RB@MgFeAlO4-NH2 magnetic composite could remove hazardous Ni (II) from wastewater. Experimental results show the composite can accept 201.62 mg g -1 Ni (II). Due to its environmental friendliness, inexpensive cost, magnetic separation ease, and high sorption capacity, RB@MgFeAlO4-NH2 may be used to remove Ni(II) from aqueous solutions at a low cost. In treating organic wastewater, adsorbent/ferrite composites can adsorb and decompose organics. Ying et al. used microwave radiation to treat organic wastewater using a rice hull/MnFe2O4 composite (RHM) created through calcination in a nitrogen atmosphere. This is believed because MnFe2O4 is present, which increases RHM's catalytic activity. Water washing can renew RHM. However, RHM's surface area and maximal COD removal rate decline for each regeneration cycle. This innovative rice hull/MnFe2O4 composite has the benefits of low cost and quick processing, and it may find promising use as a wastewater treatment agent. A new NC adsorbent known as ALW/CoFe2O4 was produced by Suba et al. by auto-combusting Apocynaceae leaf waste-activated carbon (ALW) and CoFe2O4. This compound's antibacterial and dye-elimination properties were examined against S. aureus, E. coli, and C. albicans. The outcomes demonstrated that the synthetic ALW/CoFe2O4 has antimicrobial activity comparable to that of the common antibacterial (Streptomycin) and antifungal (Amphotericin B) medications, with a zone of inhibition spanning from 11 to 17.56 mm. With varying concentrations (100-500 mg), the good diffusion method was used to evaluate the antibacterial activity against S. aureus and E. coli and the antifungal static efficacy against C. albicans. Saleh et al. generated activated carbon (AC) from willow catkins using chemical modification techniques. Using a one-step hydrothermal process, they loaded the AC with nickel ferrite NCs. The researchers found that the 45NFAC photocatalyst was the most efficient, degrading 99.7% of RhB dye in just 90 mins under simulated sunshine. The NFAC NCs are dependable, efficient, and reusable, making them a viable photocatalyst for water environmental remediation. A new type of biochar was developed by Bai et al. (figure-8) In this study, spinel ferrite was loaded onto straw using the sol-gel technique. This study examined the impact of various environmental factors and preparation methods on biochar's adsorption characteristics. Additionally, ion-competitive adsorption tests examined ion interference and preference. To maximize biochar recovery and reuse, magnetic determination and recycling tests were done. This research contributes to straw-based biochar adsorption for heavy metal wastewater treatment. Carbon quantum dots (CQDs) can be synthesised from agricultural waste, such as sugarcane bagasse, to maximise the value of manure. Grewal J. et al.