In recent years, photocatalytic degradation technology has been paid more and more attention to the treatment of environmental pollution.
Photocatalytic treatment of pesticide wastewater is considered to be an ideal method from energy consumption and effect. The tungstate photocatalyst is well received by people for its energy saving, high efficiency, easy operation, wide application range, thorough degradation of pollutants and no secondary pollution.
Herbicide pesticide is widely used, because of its rapid effect, easy to use, has played an important role in weed management, however, with the increasing mechanization of farming, excessive use of herbicides has also begun to remain in the arable land, causing environmental pollution. Studies have shown that herbicides can cause chronic damage to humans and animals through the food chain, showing potential carcinogenic and genetic mutations, which is by no means alarmist, and the harmless degradation of herbicide wastewater is imminent.
According to the newspaper records, in order to solve the residual damage of the herbicide, people have used biochemical treatment method, wet oxidation, or activated carbon treatment. However, either the cost is too high, or the process is troublesome, moreover, the effect is low, it is really a big problem. In recent years, with the discovery of photocatalytic degradation technology, it is found that the phosphotungstic acid in the tungstate agent has a very good photocatalytic degradation effect, and the way is right, and the trouble will be swept away.
So, how can photocatalytic degradation of herbicides be done with strontium tungstate? Before using the herbicide, add a small amount of strontium phosphate to the herbicide, stir it, and then spray along with the herbicide. After the herbicide has reached the weeding effect, the residual agent in soil will soon degrade into harmless water molecules under the synergistic action of strontium and sunlight.
Some scholars have evaluated the effect of strontium tungstate as a herbicide, and a small amount of Fe3+ and natural zeolite have been added in the process. The results showed that the degradation efficiency of herbicide was highest by using strontium tungstate as photocatalyst, and almost 96.2% of the herbicide was achieved.
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