Environmental effects of nitrate nitrogen in river leaching systems

nitrate nitrogen;  percolation systems;  environmental effects;  purification mechanisms;  denitrification;  Hardness

The environmental behavior and purification mechanism of river water containing nitrate nitrogen pollution in the infiltration system of Weihe River were simulated and studied by self-designed indoor soil column experimental device, and the environmental behavior was mainly denitrification. It is concluded that the river percolation system has a great purification effect on nitrate nitrogen sewage, and its purification degree is related to the percolation medium of the percolation system, if the percolation medium is a fine-grained clay layer, the purification degree of nitrate nitrogen sewage is very high, and the purification rate reaches 100%, but it is easy to cause negative effects such as increased groundwater hardness. If the medium is coarse sand substance, its purification degree is low, but it is not easy to cause the hardness of groundwater to increase.