Farmland irrigation water sampling method

Abstract

The invention provides a farmland irrigation water sampling method including the procedures of activated carbon purification, activated carbon absorption bag preparation, sampler installation, sampling and target substance elution; activated carbon after purification is put into a small bag and sealed, an activated carbon absorption bag is prepared, the activated carbon absorption bag is mounted on a sampling rod to prepare a sampler, the sampler is placed in farmland or an irrigation water channel for sampling, a target substance in the activated carbon absorption bag taken from sampling is eluted, and a to-be-measured solution is obtained. The sampler produced with activated carbon as an adsorbent, has quite strong adsorption capacity on various heavy metals, has low cost, has the consistent adsorption capacity after being soaked in water for 30 days, and has the function of long-term accumulation adsorption acquisition of the target substance. The sampling method is simple and is convenient to operate, and provides a sampling method for the heavy metal total amount in water in a longer period for pollution monitoring and evaluation works of the farmland irrigation water.

Description

technical field [0001] The invention belongs to the field of heavy metal pollution monitoring in water, in particular to a sampling method for farmland irrigation water. Background technique [0002] In the monitoring of heavy metal pollution in environmental water, whether sample collection is effective is one of the key technical tasks of monitoring. At present, there are mainly two methods of single collection and online collection. Single sampling is the simplest, just use a container to directly take a certain amount of water for detection, but it has a major disadvantage: it can only reflect the situation at one point in time, it is almost ineffective for intermittent pollution, and it cannot be used for a period of time monitored. The online collector works well, but its main disadvantage is that it is expensive and cannot be used on a large scale. It must also have fixed facilities, mains power supply and manual maintenance in order to run normally for a long time....

AI Technical Summary

Problems solved by technology

Single sampling is the simplest, just use a container to directly take a certain amount of water for detection, but it has a major disadvantage: it can only reflect the situation at one point in time, it is almost ineffective for intermittent pollution, and it cannot be used for a period of time detected

The online collector works well, but its main disadvantage is that it is expensive and cannot be used on a large scale. It must also have fixed facilities, mains power supply and manual maintenance in order to run normally for a long time. It is suitable for monitoring pollution in industrial areas. For outdoor The applicability of the monitoring of vast farmland irrigation water is poor, and it is difficult to perform multi-point sampling and long-term sampling of farmland irrigation water

[0003] With the increasingly serious water pollution and the vigorous development of environmental monitoring and control of agricultural products, the existing monitoring and sampling work is difficult to meet the needs. It is very necessary to explore low-cost and long-term sampling methods for farmland irrigation water.