Method for monitoring heavy metals in wastewater in ferrous metallurgy industry based on spectrum technology

The invention relates to a method for monitoring heavy metals in wastewater in the ferrous metallurgy industry based on a spectrum technology. Comprising the following steps: scanning wastewater spectral data by using a spectrograph; inputting the wastewater spectral data into a wastewater heavy metal content online monitoring model and a production database, determining an allowable discharge threshold value of the wastewater heavy metal content according to national and enterprise standards, dividing wastewater with different heavy metal contents into a plurality of grades, and inputting the grades into the system; continuously updating the data of the production database, regularly extracting the data from the production database by the wastewater heavy metal content online monitoring model, training, adjusting and optimizing, and re-releasing the updated model into an online inspection system; the trained model judges the grade of the wastewater according to input wastewater spectral data and a preset hea