| The earth was originally just sea, followed by rivers, lakes. They bring human society and wealth. But in today, due to the over-exploitation of resource and environmental destruction, water pollution is exacerbating. In addition to domestic wastewater, the sewage discharged from factories and enterprises are the main sources for polluted water, which requires monitoring and improving. Detection is a means to stop water pollution, protecting human life and saving the resource for the human being. |