JPH084743B2 - Ceramic-based adsorption remover - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adsorbent / removal agent for harmful components for the purpose of preventing outflow of agricultural chemicals and fertilizers used in golf courses and the like.

[0002]

2. Description of the Related Art Conventionally, the lawn of a golf course is protected from pests,
Large amounts of insecticides, herbicides, and fungicides and fertilizers are used to grow. Prefectural governments provide guidance on proper use of pesticides and regulation of total amount of pesticides to prevent environmental pollution by pesticides. On the other hand, private companies sell various pesticide countermeasure products and removal systems. Among these, few of the countermeasure products can immediately remove many kinds of pesticides and can maintain the removal effect for many years. Recently, a pesticide adsorption decomposition agent in which an adsorbent such as activated carbon is mixed with a porous sintered body obtained by firing a metal oxide composed of silicon dioxide, calcium oxide, aluminum oxide, iron oxide, manganese oxide, magnesium oxide, and potassium oxide. Can be seen (JP-A-4-110035).
However, it is not always possible to expect a long-term removal effect for many types of pesticides.

At present, the deterioration of water quality due to eutrophication in lakes is becoming a social problem, and the emission of nitrogen and phosphorus is regulated at business establishments that introduce treated wastewater into lakes.
Currently, there is no countermeasure product for simultaneous removal of pesticides and nutrients. In addition, the removal system is mainly intended to remove suspended substances and pesticides, and the present situation is that the introduction of the system and the maintenance and management of it are economically heavy. In addition, it is often desired to adsorb and remove pesticides and harmful components other than phosphorus and nitrogen from wastewater.

[0004]

SUMMARY OF THE INVENTION The present invention provides a ceramic-based adsorptive remover of harmful components used for the purpose of preventing outflow of agricultural chemicals and fertilizers from golf courses and the like.

[0005]

The ceramic-based adsorptive remover of the present invention comprises a limestone wash cake containing calcium carbonate and clay as a base material, to which sepiolite and silica-based powder and granules are blended. It is characterized in that the product is fired after being molded.

[0006]

The ceramic-based adsorption / removal agent of the present invention has a function of adsorbing / removing pesticides, phosphorus, etc., and the adsorbed pesticides have a simple biodegradation function and hydrolysis function. It effectively removes many kinds of pesticides by performing a simple construction. In particular, the ceramic-based adsorption remover of the present invention is excellent in the function of removing agricultural chemicals and phosphorus,
Since the adsorbed pesticides are decomposed and removed, it is rare that the adsorbed pesticides reach the breakthrough capacity in normal use, and therefore, the removal effect can be exerted for many years.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The limestone wash cake, which is the base material of the raw material for the ceramic-based adsorption remover, is generated in the water washing ore separation process after limestone mining. That is, when limestone is washed with water, a slurry containing fine-grained clay and limestone powder is generated. This is precipitated in a thickener (precipitation tank) and then dehydrated by a filter press (pressurized dehydrator) or the like, and contains about 70% or more of limestone powder and about 30% or less of clay powder. On the other hand, sepiolite has a characteristic of having pores.

[0008] Examples of silica-based powder include fly ash, zeolite, and the like.
It has a function of replenishing i minutes. The fly ash may be ordinary coal-based fly ash generated from a thermal power plant or the like. The zeolite may be natural zeolite or synthetic zeolite.

The blending weight ratio of the limestone wash cake (A), sepiolite (B) and silica-based powder (C) is (A):
(B): (C) = 40 to 60:10 to 30:10 to 40
Is preferred, and more preferably 45-55: 15-2
It is 5:25 to 35. The above components of the limestone wash cake, sepiolite and silica-based powder are mixed and then granulated. No particular binder is required for granulation, and an ordinary granulator can be used as long as there is an appropriate amount of water.

The granulated product is 1100 to 1300 ° C.
Calcined at about the same temperature, dicalcium silicate (2C
It becomes a ceramic with aO.SiO ₂ skeleton as the skeleton, and a ceramic-based adsorption / removal agent having an excellent removal function for pesticides, phosphorus, etc. can be obtained.

The particle size of the ceramic-based adsorption / removal agent of the present invention is appropriately selected depending on the place of use. For example, when it is added to turf soil, it has a diameter of 1.5 to 5 mm in consideration of water permeability. Is preferable, and when used in a water collecting manhole or the like, those having a diameter of 5 to 15 mm are preferable.

The method for applying the ceramic-based adsorption / removal agent of the present invention includes a method of adding it to the bed soil, a method of installing it in layers in the bed soil, a method of installing it in a water collecting pipe or a water collecting pit, and a method of installing it in a regulating pond. And a method of filling the column with water to pass the water to be treated, and these methods are all simple.

[0013]

EFFECT OF THE INVENTION The ceramic-based adsorption / removal agent of the present invention has a function of removing harmful components such as agricultural chemicals and phosphorus, and is particularly excellent in hydrolysis function. It has the effect of rapidly decomposing and removing.
It also has the function of biodegrading pesticides over a long period of time. Therefore, the effect of removing harmful components such as pesticides does not change from the beginning, and the effect can be expected for a long period of time.

In particular, as shown in Experimental Examples 1 and 2 described later, the ceramic-based adsorption / removal agent of the present invention has excellent pesticide decomposing ability, and its removal efficacy is far longer than that of a commercial product mainly composed of adsorption. Can be maintained. Further, as shown in Experimental Example 3, it has a very excellent removal function for phosphorus. Furthermore, since it has excellent physical and chemical properties such as water retention ability, air permeability, water permeability, and fertilizing ability, it is effective in improving the soil floor and is easy to construct.

Further, by filling the column and passing water through it, it is possible to purify the waste water containing harmful components. EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited to the following examples as long as the gist thereof is not exceeded.

[0016]

EXAMPLE 1 60 parts by weight of limestone washed filter cake, 20 parts by weight of sepiolite and 20 parts by weight of fly ash were mixed and granulated, and then fired at 1200 ° C. to obtain a particle size of 0.75 to 1 mm according to the present invention. To obtain a ceramic-based removing agent.

Experimental Example 1: Pesticide removal function (indoor column test) A pesticide commonly used in golf courses was used. That is, as a fungicide, chloroneb, isoprothiolane, flutolanil,
Iprodione, TPN, propyzamide and simazine (CAT) as herbicides, fenitrothion (M
EP), isoxathion, and diazinon were selected. 3 g of the ceramic-based adsorption remover of Example 1 of the present invention or activated carbon as a comparative control was laminated on a column having a cross-sectional area of 0.78 cm ² , and a solution having an influent concentration shown in Table 1 was added at a rate of 25 ml per hour. Continuously pour about 520 ml, 2
The average pesticide concentration in the effluent during 0.75 hours was measured, and the results are shown in Table 1.

[0018]

[Table 1] Table 1: Pesticide removal effect Outflow liquor concentration (mg / l) Investigation target pesticide name Influent concentration (mg / l) Example 1 product Activated carbon chloroneb 94.0 8.52 8.59 Isopratiolane 328 7.11 31.2 Flutolanil 223 7.01 21.2 Iprodione 2020 6.42 187 TPN 789 23.3 78.0 CAT 1325 23.6 127 Propizzamide 287 14.5 27.4 MEP 1040 20.3 100 Isoxathione 1040 7.03 98.6 Diazinon 650 16.8 60.1

From the above experimental results, it can be seen that the ceramic-based adsorption / removal agent according to the present invention is superior in the removal of agricultural chemicals as compared with the commonly used activated carbon.

Experimental Example 2: Pesticide removal function (indoor column test) 3 g of the ceramic adsorption removal agent of Example 1 of the present invention or a commercially available pesticide adsorption agent as a comparative control was laminated on a column having a cross-sectional area of 0.78 cm ² . About 720 ml of the solution having the influent concentration shown in Table 2 was continuously flown at a rate of 32 ml per hour, and the average pesticide concentration in the effluent during 22.5 hours was measured. The results are shown in Table 2. It was

[0021]

[Table 2] Table 2: Pesticide removal effect Effluent concentration (mg / l) Investigation target pesticide name Influent concentration (mg / l) Example 2 product Commercial pesticide adsorbent chloroneb 2.98 0.587 0.551 Isopratiolane 2.67 0.398 0.429 Flutolanil 2.12 0.478 0.559 Iprodione 1.50 0.293 0.391 TPN 5.26 1.02 1.86 CAT 11.1 4.26 4.12 Propizzamide 4.86 1.76 1.89 MEP 3.03 0.292 0.348 Isoxathione 1.83 0.306 0.461 Diazinon 2.71 0.445 0.347

From the above experimental results, it can be seen that the ceramic-based remover according to the present invention is superior to the commercially available pesticide adsorbent in removing pesticides.

Experimental Example 3: Phosphorus adsorption capacity 3 g of each sample shown in Table 3 was laminated on a column having a cross-sectional area of 0.78 cm ² , and a fertilizer containing PO ₄ -P (phosphorus phosphorus) as a fertilizer component (turf). Green P, Otsuka Chemical Co., Ltd.
30 μm, adding the solution of the above) in an amount of 695 μg / cm ^2.
The amount of fertilizer components in the effluent was measured by pouring water in an amount corresponding to m rainfall, and the results are shown in Table 3.

[0024]

TABLE 3: Look phosphorus adsorption capacity runoff ([mu] g / cm ²⁾ specimen fertilizer Ingredient Example 2 dishes commercial pesticide adsorbent activated carbon PO ₄ -P <1 105 295 or more test results However, it can be seen that the phosphorus removing ability of the ceramic-based removing agent of the present invention is extremely superior to that of the commercially available agricultural chemical adsorbent and activated carbon.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Minor Hirahara 49 Minami Kasaki, Ogaki City, Gifu Prefecture (72) Inventor Shunji Nakamura Aichi Prefecture 3-28-12 Mei Station, Nakamura-ku, Nagoya City (72) Inventor Isao Niwa Aichi Prefecture 102-1 Shibaari, Seko, Moriyama-ku, Nagoya

Claims (1)

[Claims] 1. A ceramic characterized in that a limestone washed cake containing calcium carbonate and clay is used as a base material, sepiolite and silica-based powder and granules are blended, and the blend is molded and then fired. System adsorption remover.