Catalytic Degradation of Pesticide Organic Pollutants with Nanozymes

Pesticides are used in agriculture, and while they bring great economic benefits to society, their residues always cause harm to human health through the ecological environment. However, there are many types of pesticides with complex structures and strong toxicity to organisms. Neither specific adsorption methods nor biodegradation methods can effectively remove pesticide residues.

Nanozymes degradation techniques based on Fenton reactions can ignore structural differences in pesticides and environmental conditions, and they can efficiently remove different types of pesticides. So, they are of great application in the field of pesticide degradation. Creative Enzymes provides a variety of nanozymes for catalytic degradation of pesticide residues to assist our clients with research in the nanozymes field.

Degradation of Atrazine with Nanozymes

• Atrazine is a selective organic herbicide, which is commonly used for weed removal in cropland and wasteland. It has a high leaching capacity and is often retained in surface water.
• Creative Enzymes prepares Fe nanozymes from raw red soil using eucalyptus leaf extract. The results showed that the green synthesis of enzymes from natural red soil was more effective in degrading atrazine.

Degradation of DDT with Nanozymes

• DDT (1,1, 1-trichloro-2, 2-bis / 4-chlorophenyl ethane) is a widely used organic pesticide. It is resistant to decomposition and lipophilic, which allows it to remain in soil and water in large quantities, eventually seriously endangering human health through enrichment in the food chain.
• We adopt hydrothermal synthesis a new kind of Ni / Fe₃O₄ nanozymes, it combines with heterogeneous Fenton reaction activity of the degradation of organic pollutants to DDT. The catalytic degradation of Ni / Fe₃O₄ nanozymes with superoxide activity is better compared to that of pristine iron oxides. Thus, it is a promising catalyst for DDT degradation.

Fig. 1 Ni / Fe₃O₄ nanozymes for the enhanced degradation of refractory DDT in heterogeneous Fenton-like system. (Zhirun X, et al., 2017)

Degradation of Imidacloprid with Nanozymes

• Imidacloprid is one of the most commonly used organic pesticides in agriculture, which has high stability in water and is not easy to be degraded.
• We prepare CuFe2O4 nanozymes with superoxide simulated enzyme, and for the first time as a heterogeneous Fenton catalyst for degradation of imidacloprid. Catalytic systems based on nanozymes have good degradation activity under acidic conditions. The degradation rate is proportional to the amount of ·OH produced, which also indicates that ·OH is involved in the REDOX reaction of imidacloprid. In addition, the CuFe2O4 nanozyme is stable and recyclable, and can be easily isolated.

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