Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400044, China; College of Environment and Ecology, Chongqing University, Chongqing 400044, China.
Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400044, China.
Bioresour Technol. 2024 Jun;402:130762. doi: 10.1016/j.biortech.2024.130762. Epub 2024 Apr 29.
Ionic cadmium (Cd (II)) in water is a significant threat to ecosystems, the environment, and human health. Research is currently focused on developing efficient adsorption materials to combat Cd (II) pollution in water. One promising solution involves co-pyrolyzing solid residue from anaerobic digestion of food waste with oil-based drill cuttings pyrolysis residue to create a biochar with high organic matter content. This biochar has a lower heavy metal content and leaching toxicity compared to China's national standards, making it both safe and resourceful. It exhibits a high adsorption capacity for Cd (II) in water, reaching up to 47.80 ± 0.37 mg/g. Raising the pyrolysis temperature above 600 °C and increasing the amount of pyrolysis residue beyond 30 % enhances the biochar's adsorption capacity. The adsorption process is primarily driven by mineral precipitation, offering a promising approach for dual waste resource management and reducing heavy metal pollution.
水中的离子镉（Cd（II））对生态系统、环境和人类健康构成重大威胁。目前的研究集中于开发高效吸附材料，以应对水中的 Cd（II）污染。一种有前途的解决方案是将厨余垃圾厌氧消化的固体残渣与油基钻井泥浆热解残渣共热解，以创建一种具有高有机物含量的生物炭。与中国国家标准相比，这种生物炭的重金属含量和浸出毒性更低，既安全又有资源效益。它对水中的 Cd（II）具有高吸附能力，最高可达 47.80 ± 0.37 mg/g。将热解温度提高到 600°C 以上，并将热解残渣的量增加到 30%以上，可以提高生物炭的吸附能力。吸附过程主要受矿物沉淀的驱动，为双重废物资源管理和减少重金属污染提供了一种很有前途的方法。
