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Method for removing prosulfuron in water by using montmorillonite adsorbent

A technology of flusulfuron and montmorillonite, which is applied in the fields of adsorption water/sewage treatment, chemical instruments and methods, water pollutants, etc., to achieve the effects of stable properties, stable removal effect and high specific surface area

Pending Publication Date: 2020-07-03
NANJING RONGZHONG ENVIRONMENTAL ENG RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of montmorillonite as an adsorbent to remove fluorsulfuron in water has not been reported yet.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The adsorption and removal effect of humic acid on triflouron-methyl in water is generally considered to be better for the adsorption and removal of organic matter by humic acid. Montmorillonite for comparison.

[0019] Weigh a certain amount of humic acid (100 mg) into a 50 mL glass centrifuge tube, add 20 mL of background solution containing fluorsulfuron-methyl (concentration of 3-16 mg L -1 ). Background solution is 0.01 M CaCl 2 and 200 mg L -1 NaN 3 (inhibiting microbial activity) solution. After shaking on a rotary shaker for 24 h at room temperature, at 3000 rpm -1 Centrifuge for 15 min, take the supernatant, filter it through a 0.45 μm water-based filter membrane, and measure the concentration of fluorsulfuron-methyl in the filtrate by high-performance liquid chromatography. The above treatments are repeated three times, and three humic acid-free treatment as a control. Table 1 shows the adsorption effect of humic acid on triflouron-methyl in water. It ...

Embodiment 2

[0022] The adsorption and removal effect of montmorillonite on fluorosulfuron in water, weigh a certain amount of montmorillonite (100 mg) in a 50 mL glass centrifuge tube, add 20 mL of background solution containing fluorosulfuron (concentration is 3-16 mg L -1 ). The background solution is 0.01 MCaCl 2 and 200 mg L -1 NaN 3 (inhibiting microbial activity) solution. After shaking on a rotary shaker for 24 h at room temperature, at 3000 rpm -1 Centrifuge for 15 min, take the supernatant, filter it through a 0.45 μm water-based filter membrane, and measure the concentration of fluorsulfuron-methyl in the filtrate by high performance liquid chromatography. treatment as a control. Table 2 shows the adsorption effect of montmorillonite on fluorsulfuron in water. It can be seen from Table 2 that when the initial concentration in the water body is 3.335-16.218mg / L, the adsorption percentage of montmorillonite to fluorsulfuron-methyl in the water body can reach 78.81-88.35%, w...

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PUM

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Abstract

The invention belongs to the technical field of polluted water treatment and application, and discloses a method for removing prosulfuron in water by using a montmorillonite adsorbent. The method comprises the following steps: firstly, adding montmorillonite into prosulfuron polluted water, then stirring or oscillating the water for a certain period of time, carrying out centrifugal filtration, and finally, separating montmorillonite with adsorbed prosulfuron from treated water so as to remove prosulfuron from the water. The method for removing the prosulfuron in water by utilizing a montmorillonite adsorbent has the beneficial effects that prosulfuron in water can be effectively removed, the method also has the advantages of stable removal effect, corrosion resistance, heat resistance, notoxicity and the like, and meanwhile, the montmorillonite adsorbent is low in energy consumption, economical and environment-friendly, and has a wide application prospect.

Description

technical field [0001] The invention belongs to the technical field of treatment and application of polluted water, in particular to a method for removing fluorsulfuron in water by using a montmorillonite adsorbent, and is applied in the technical field of treatment of fluorosulfuron polluted wastewater. Background technique [0002] Flusulfuron-methyl is a new type of sulfonylurea herbicide with high efficiency and low toxicity, which is widely used in cereal crops to control broad-leaved weeds and some grass weeds. [0003] Due to the advantages of high herbicidal activity, low dosage and high safety, triflouron-methyl has been widely used in my country and even in the world. According to reports, after the application of pesticides, only 10-20% are effectively used, and the rest are all lost into the soil environment. However, due to the weak adsorption of sulfonylurea herbicides such as fluorsulfuron on the soil and relatively high mobility, they can enter surface water...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F101/30
CPCC02F1/281C02F2101/306
Inventor 任文杰赵玲周晓飞许有仁
Owner NANJING RONGZHONG ENVIRONMENTAL ENG RES INST CO LTD
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