1. Recognize heavy metal ion wastewater

Heavy metal ion wastewater refers to the wastewater containing heavy metals discharged from industrial production processes such as mining and metallurgy, machinery manufacturing, chemical industry, electronics, instrumentation, etc.

II. What are the main heavy metal ions commonly found in wastewater?

The common heavy metal ions in wastewater mainly include: copper, lead, zinc, iron, cobalt, arsenic, mercury, chromium, nickel, manganese, cadmium, mercury, tungsten, molybdenum, etc.

III. Characteristics of heavy metal wastewater

1. It is highly toxic and accumulative

Heavy metal ions (such as mercury, cadmium, lead, chromium) are highly toxic even in trace amounts. They are easy to accumulate through the food chain, resulting in chronic poisoning (such as pain disease, Minamata disease), threatening ecological and human health.

2, durability and refractory

Heavy metals cannot be naturally degraded, long-term retention in the environment (such as soil, water), may last for decades, difficult to repair, in sharp contrast with organic pollutants.