JPH10102471A - Soil pollution treatment method - Google Patents
Soil pollution treatment methodInfo
- Publication number
- JPH10102471A JPH10102471A JP25574096A JP25574096A JPH10102471A JP H10102471 A JPH10102471 A JP H10102471A JP 25574096 A JP25574096 A JP 25574096A JP 25574096 A JP25574096 A JP 25574096A JP H10102471 A JPH10102471 A JP H10102471A
- Authority
- JP
- Japan
- Prior art keywords
- soil
- quicklime
- weight
- heavy metals
- oils
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
(57)【要約】
【課題】 生石灰を利用するという、処理の手間が掛か
らずに、処理コストが安価で環境に安全な方法で、確実
に、重金属類や油類で汚染された土壌中の重金属類や油
類が、雨水や地下水の中に溶出したり滲み出したりしな
いように処理することができる。
【解決手段】 現地発生土に、土に対して50〜100 重量
％の生石灰と生石灰に対して5 〜10重量％の珪酸ナトリ
ウムとを添加混合した後、この混合系に土に対して約40
重量％の水を注入して生石灰の水和反応を喚起させ、現
地発生土に含む重金属類を珪酸塩とし、また、油類を反
応時に生成する珪酸カルシウムゲルに吸着させる。(57) [Abstract] [Problem] To use quick lime in a soil that is contaminated with heavy metals and oils in a method that is inexpensive, environmentally safe, and requires no processing time. Heavy metals and oils can be treated so that they do not elute or seep into rainwater or groundwater. SOLUTION: To a locally generated soil, 50 to 100% by weight of quicklime based on soil and 5 to 10% by weight of sodium silicate based on quicklime are added and mixed.
By injecting water by weight, the hydration reaction of quicklime is stimulated, heavy metals contained in the locally generated soil are converted into silicates, and oils are adsorbed on calcium silicate gel generated during the reaction.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、重金属類または油
類によって汚染された土壌の処理方法に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating soil contaminated with heavy metals or oils.
【０００２】[0002]
【従来の技術】生石灰を地盤を構成する土壌にまぜて、
改良を行う方法は従来から行われている。2. Description of the Related Art Mixing quicklime into the soil constituting the ground,
Improvements have been made in the past.
【０００３】それは、被対象地盤に対して数％重量の生
石灰を添加することによって、まず生石灰の水和による
発熱、膨張作用によって地盤中の水分の蒸発を促進させ
るもので、生石灰から消石灰への化学変化の過程で体積
膨張を起こし、周辺地盤の圧密を進行させることを利用
するものである。[0003] In this method, by adding quick lime of several percent weight to the ground to be treated, heat of hydration of quick lime and expansion of water in the ground are promoted by expansion action, and quick lime is converted from slaked lime to slaked lime. It uses volume expansion in the process of chemical change and advances the consolidation of the surrounding ground.
【０００４】このようにして、生成した消石灰と周囲の
地盤との間にイオン交換反応が起こり、カルシウムイオ
ンが土粒子表面に吸着されて、土粒子は凝集化作用を示
し団粒化して地盤の含水比が低下する。In this way, an ion exchange reaction occurs between the slaked lime produced and the surrounding ground, calcium ions are adsorbed on the surface of the soil particles, and the soil particles exhibit an agglomeration action and aggregate to form a ground. The water content decreases.
【０００５】また、日数の経過によって、カルシウムイ
オンが土壌中のシリカやアルミナと結合して珪酸石灰水
和物やアルミン酸石灰水和物等の石灰水和物を作り、こ
れが結合材となって強度を発揮するようになり、さら
に、前記各過程の反応に対して過剰な生石灰は地盤中の
炭酸または炭酸ガスによって炭酸カルシウムを生じ、こ
の際に固結作用を起こして強度を発揮するようになり地
盤は改良される。[0005] Further, as the number of days passes, calcium ions combine with silica and alumina in the soil to form lime hydrates such as silicate lime hydrate and lime aluminate hydrate. As a result, the excess quicklime for the reaction of each of the above processes produces calcium carbonate due to carbon dioxide or carbon dioxide gas in the ground, and at this time, it exerts a consolidation action to exert the strength. The ground will be improved.
【０００６】[0006]
【発明が解決しようとする課題】このような生石灰を利
用する方法は材料としての生石灰が安価で豊富に入手で
きることから利用価値は高いが、水銀、六価クロム、カ
ドミウム等の重金属類や油類で汚染された土壌の対処に
はならない。The method of using such quick lime has a high utility value because quick lime as a material is inexpensive and abundantly available, but heavy metals such as mercury, hexavalent chromium, and cadmium and oils are used. Does not deal with contaminated soil.
【０００７】かかる汚染土壌ではこれらの汚染物質が雨
水や地下水の中に溶出してきたり、滲み出してきたりし
て二次災害を引き起こし環境問題となっているが、土壌
が水銀、六価クロム、カドミウム等の重金属類で汚染さ
れた場合の無害化処理は、従来は汚染土壌を直接セメン
トで固化する処理方法によって、重金属類が雨水や地下
水の中に溶出することを防止している。[0007] In such contaminated soil, these contaminants are eluted into or leached from rainwater or groundwater, causing secondary disasters and causing environmental problems. The detoxification treatment when contaminated with heavy metals such as the above has conventionally prevented heavy metals from being eluted into rainwater or groundwater by a treatment method in which contaminated soil is directly solidified with cement.
【０００８】一方、土壌が油類で汚染された場合の無害
化処理は、汚染土壌を直接セメントで固化するか、汚染
土壌を焼却炉で揮発させて焼却する処理方法によって、
油類が雨水や地下水の中に滲み出すことを防止してい
る。On the other hand, when the soil is contaminated with oils, the detoxification treatment is carried out by solidifying the contaminated soil directly with cement, or volatilizing the contaminated soil in an incinerator and incinerating it.
Prevents oil from seeping into rainwater and groundwater.
【０００９】このように汚染土壌を直接セメントで固化
する処理方法では処理の手間や処理コストが嵩むもので
あり、また、汚染土壌を焼却炉で揮発させて焼却する処
理方法では、非揮発性の油類に対しては十分な処理がで
きないことや焼却処理施設の大型化や燃料や動力等のラ
ンニングコストが嵩む等の問題が起きている。As described above, the treatment method in which the contaminated soil is solidified directly with cement increases the labor and cost of the treatment, and the treatment method in which the contaminated soil is volatilized in an incinerator to incinerate it is non-volatile. Problems have arisen such as insufficient treatment of oils, an increase in the size of incineration facilities, and an increase in running costs for fuel and power.
【００１０】本発明の目的は前記の従来例の不都合を解
消し、生石灰を利用するという、処理の手間が掛からず
に、処理コストが安価で環境に安全な方法で、確実に、
重金属類や油類で汚染された土壌中の重金属類や油類
が、雨水や地下水の中に溶出したり滲み出したりしない
ように処理することができる土壌の汚染処理方法を提供
することにある。An object of the present invention is to solve the above-mentioned disadvantages of the prior art and to use quick lime, which requires no processing time, has a low processing cost and is environmentally safe.
An object of the present invention is to provide a soil pollution treatment method capable of treating heavy metals and oils in soil contaminated with heavy metals and oils so as not to elute or seep into rainwater or groundwater. .
【００１１】[0011]
【課題を解決するための手段】本発明は前記目的を達成
するため、現地発生土に、土に対して50〜100 重量％の
生石灰と生石灰に対して５〜10重量％の珪酸ナトリウム
とを添加混合した後、この混合系に土に対して40重量％
の水を注入して生石灰の水和反応を喚起させ、現地発生
土に含む重金属類を珪酸塩としたこと、もしくは、現地
発生土に、土に対して50〜100 重量％の生石灰と生石灰
に対して５〜10重量％の珪酸ナトリウムとを添加混合し
た後、この混合系に土に対して40重量％の水を注入して
生石灰の水和反応を喚起させ、生成する珪酸カルシウム
ゲルに、現地発生土に含む油類を吸着させたことを要旨
とするものである。According to the present invention, in order to achieve the above object, 50 to 100% by weight of quicklime based on soil and 5 to 10% by weight of sodium silicate based on quicklime are added to a locally generated soil. After adding and mixing, 40% by weight based on soil
Water to induce the hydration reaction of quicklime and to convert heavy metals contained in the locally generated soil to silicates, or to the locally generated soil to 50-100% by weight of quicklime and quicklime After adding and mixing 5 to 10% by weight of sodium silicate, 40% by weight of water is poured into the mixed system to induce a hydration reaction of quicklime, and to form a calcium silicate gel, The gist is to adsorb oils contained in locally generated soil.
【００１２】本発明の土壌の汚染処理方法は、通常の地
盤改良の改良材として使用する生石灰を用いるが、地盤
改良の時に使用する量よりも多く使用し、さらに、珪酸
ナトリウムを併用するところに特徴を有する。In the method for treating soil contamination according to the present invention, quicklime used as a usual soil improvement material is used, but it is used in an amount larger than that used for soil improvement, and is further used in combination with sodium silicate. Has features.
【００１３】請求項１記載の本発明によれば、現地発生
土に含む水銀、六価クロム、カドミウム等の重金属類は
水に不溶性な珪酸塩となるので、地下水や雨水の中に溶
出することなく土の中で安全な状態となる。According to the first aspect of the present invention, since heavy metals such as mercury, hexavalent chromium, and cadmium contained in locally generated soil become silicates which are insoluble in water, they are eluted into groundwater or rainwater. It is safe in the soil without it.
【００１４】請求項２記載の本発明によれば、現地発生
土に含む油類は水に不溶な表面積の大きい珪酸カルシウ
ムゲルに強固に吸着されるので、地下水や雨水の中に滲
み出すことなく土の中で安全な状態となる。According to the second aspect of the present invention, the oils contained in the locally generated soil are firmly adsorbed on the water-insoluble calcium silicate gel having a large surface area, so that the oils do not seep into groundwater or rainwater. It is safe in the soil.
【００１５】[0015]
【発明の実施の形態】以下、本発明の土壌の汚染処理方
法について詳細に説明する。本発明の土壌の汚染処理方
法は、第１実施形態として、水銀、六価クロム、カドミ
ウム等の重金属類よって汚染された現地発生土に、攪拌
しながら、土に対して50〜100 ％重量の生石灰（Ｃａ
Ｏ）と生石灰の５〜10％重量の珪酸ナトリウム（Ｎａ2
ＳｉＯ3 ）とを添加しよく混合する。その後、この混合
系に土に対して約40％重量の水を注入する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the method for treating soil contamination of the present invention will be described in detail. In the first embodiment, the method for treating soil pollution according to the present invention is a method of treating a soil generated locally by heavy metals such as mercury, hexavalent chromium, cadmium, etc., with stirring, while stirring 50 to 100% by weight of the soil. Quicklime (Ca
O) and 5-10% by weight of quicklime of sodium silicate (Na 2
SiO 3 ) and mix well. Thereafter, about 40% by weight of water with respect to the soil is injected into the mixture.
【００１６】第２実施形態として、油類によって汚染さ
れた現地発生土に、攪拌しながら、土に対して50〜100
％重量の生石灰（ＣａＯ）と生石灰の５〜10％重量の珪
酸ナトリウム（Ｎａ2 ＳｉＯ3 ）とを添加しよく混合す
る。その後、この混合系に土に対して約40％重量の水を
注入する。As a second embodiment, 50 to 100% of the soil, which has been contaminated with oils, is added to the soil generated on site while stirring.
% Lime (CaO) and sodium silicate (Na 2 SiO 3 ) of 5 to 10% by weight of quick lime are added and mixed well. Thereafter, about 40% by weight of water with respect to the soil is injected into the mixture.
【００１７】これら第１実施形態、第２実施形態ともに
現地発生土に、攪拌しながら、生石灰（ＣａＯ）と珪酸
ナトリウム（Ｎａ2 ＳｉＯ3 ）とを混合する方法は、ミ
キサーを用いるバッチ処理の場合でもよいが、掘削と同
時に攪拌混合ができる機械装置を用いて連続的に行うよ
うにしてもよい。かかる装置としては、オーガのごとき
掘削軸を有する機械で地盤を連続的に掘削し、同時に材
料と水を注出して攪拌していく方法が考えられる。In both the first embodiment and the second embodiment, the method of mixing quick lime (CaO) and sodium silicate (Na 2 SiO 3 ) with the locally generated soil while stirring is performed in the case of batch processing using a mixer. Alternatively, it may be performed continuously using a mechanical device capable of stirring and mixing simultaneously with excavation. As such an apparatus, a method in which the ground is continuously excavated by a machine having an excavation axis such as an auger, and at the same time, material and water are poured out and agitated is considered.
【００１８】前記水を注入することにより、次の水和反
応が加速度的に起こり、発熱反応によって混合系全体の
温度が上昇し、粘性が低下して流動性を増し、土と処理
剤の混合が容易に進行して消石灰〔Ｃａ（ＯＨ）2 〕を
生ずる。 ＣａＯ＋Ｈ2 Ｏ→Ｃａ（ＯＨ）2 By injecting the water, the next hydration reaction occurs at an accelerated rate, and the temperature of the entire mixing system rises due to the exothermic reaction, the viscosity decreases, the fluidity increases, and Easily proceed to produce slaked lime [Ca (OH) 2 ]. CaO + H 2 O → Ca (OH) 2
【００１９】次いで、消石灰は珪酸ナトリウムと反応し
て、次の化学式に示すように珪酸カルシウム（ＣａＳｉ
Ｏ3 ）を生じ、この珪酸カルシウムは水に不溶の白色沈
殿となる。 Ｃａ（ＯＨ）2 ＋Ｎａ2 ＳｉＯ3 →ＣａＳｉＯ3 ＋Ｎａ
ＯＨNext, slaked lime reacts with sodium silicate, and as shown in the following chemical formula, calcium silicate (CaSi
O 3 ), and this calcium silicate becomes a white precipitate insoluble in water. Ca (OH) 2 + Na 2 SiO 3 → CaSiO 3 + Na
OH
【００２０】また、現地発生土中の重金属類は重金属イ
オン（Ｍ）になって、混合系において、カルシウムイオ
ンと同様に珪酸ナトリウムと反応して、次の化学式に示
す重金属の珪酸塩となり沈殿を生ずる。この重金属の珪
酸塩は水に対して難溶で、一般的な酸では侵され難いも
のとなる。 Ｍ（イオン）＋Ｎａ2 ＳｉＯ3 →ＭＳｉＯ3 ＋２Ｎａ
（イオン） また、カルシウムイオンは金属イオンに比べイオン化傾
向が強いので次の化学反応も考えられ、重金属類を抱合
不溶化し固定する。 Ｍ（イオン）＋ＣａＳｉＯ3 →ＭＳｉＯ3 ＋Ｃａ（イオ
ン）The heavy metals in the locally generated soil are converted into heavy metal ions (M), which react with sodium silicate in the mixed system in the same manner as calcium ions to form heavy metal silicates represented by the following chemical formula and precipitate. Occurs. The heavy metal silicate is hardly soluble in water and is hardly attacked by common acids. M (ion) + Na 2 SiO 3 → MSiO 3 + 2Na
(Ion) In addition, since calcium ions have a stronger ionization tendency than metal ions, the following chemical reaction is also conceivable. M (ion) + CaSiO 3 → MSiO 3 + Ca (ion)
【００２１】さらに、珪酸は非常に複雑な構造の集合体
であって、そのゲル（シリカゲル）と重金属類との結合
によって重金属類を固定することや、重金属原子を抱接
するマトリックス構造をとることによって重金属類を固
定することも知られている。Further, silicic acid is an aggregate having a very complicated structure. The silica (silica gel) is bonded to heavy metals to fix the heavy metals, and to form a matrix structure that embraces heavy metal atoms. It is also known to fix heavy metals.
【００２２】また、沈殿した珪酸カルシウムは多孔質で
あって、単位重量当たりの表面積が極めて大きく、一般
に珪酸カルシウム１ｇ当たりの表面積は600m2 程度とな
ることが知られており、この珪酸カルシウムの特性によ
って、汚染土壌中の油類は非常に薄い膜状に吸着され、
強い保持力によって固定される。The precipitated calcium silicate is porous and has a very large surface area per unit weight. It is generally known that the surface area per 1 g of calcium silicate is about 600 m 2. The oil in the contaminated soil is adsorbed in a very thin film,
Fixed by strong holding power.
【００２３】本発明の土壌の汚染処理方法において、使
用する生石灰は該生石灰の表面を脂肪族多価アルコール
（エチレングリコール、ジエチレングリコール、トリエ
チレングリコール、グリセリン等）でコーティングした
ものを用いても良く、これによって添加時の粉塵の防止
や輸送中の水和反応を防止することができる。In the method for treating soil contamination of the present invention, quicklime used may be one obtained by coating the surface of the quicklime with an aliphatic polyhydric alcohol (such as ethylene glycol, diethylene glycol, triethylene glycol, or glycerin). This can prevent dust at the time of addition and hydration reaction during transportation.
【００２４】さらに、土壌の汚染状態によっては種々配
合を変えることが好ましい。例えば、土壌の汚染度が激
しい場合には、珪酸ナトリウムの他に二酸化珪素（Ｓｉ
Ｏ2）を土に対して５重量％程度添加したり、生石灰と
汚染土との反応を長時間にするには石膏（ＣａＳＯ4 ）
を土に対して２〜３重量％添加したり、発熱反応を促進
し高温にするには酸化マグネシウム（ＭｇＯ）を土に対
して２〜３重量％添加すること等によって対処する。Furthermore, it is preferable to change various compositions depending on the soil contamination state. For example, when soil pollution is severe, silicon dioxide (Si) may be used in addition to sodium silicate.
Gypsum (CaSO 4 ) is used to add O 2 ) to the soil at about 5% by weight or to make the reaction between quick lime and contaminated soil longer.
Is added to the soil by 2 to 3% by weight, or magnesium oxide (MgO) is added to the soil by 2 to 3% by weight to promote the exothermic reaction and increase the temperature.
【００２５】また、本発明の土壌の汚染処理方法による
と、処理後の土のＰＨが12〜13程度になるが、これをそ
のまま放置すると約４〜７週間後にＰＨが７〜８まで低
下し、一般の土壌のＰＨ６〜７に近づくことが実験で確
認されている。これは土壌中の細菌や降雨や大気中の炭
酸の作用と考えられる。Further, according to the soil contamination treatment method of the present invention, the pH of the soil after the treatment is about 12 to 13, but if this is left as it is, the pH drops to 7 to 8 after about 4 to 7 weeks. It has been confirmed by experiments that the pH approaches 6 to 7 of general soil. This is thought to be the effect of bacteria in the soil, rainfall and atmospheric carbonic acid.
【００２６】次に、本発明の土壌の汚染処理方法によっ
て処理した試験結果については、次に示す試験項目およ
び定量分析方法により確認した。Next, the results of the test performed by the soil contamination treatment method of the present invention were confirmed by the following test items and quantitative analysis method.
【００２７】 試験項目 定量分析方法 (1)全水銀 環境庁告示第５９号付表３による。 (2)カドミウム ＪＩＳ−Ｋ−０１０２の５５による。 (3)六価クロム ＪＩＳ−Ｋ−０１０２の６５．２による。 (4)砒素 ＪＩＳ−Ｋ−０１０２の６１による。 (5)銅 総理府令第６６号による。 (6)亜鉛 環境庁告示第１３号第２の１１による。 (7)油 分 環境庁告示第３号による。Test items Quantitative analysis method (1) Total mercury See Table 3 in Appendix No. 59 of the Environment Agency. (2) Cadmium According to 55 of JIS-K-0102. (3) Hexavalent chromium According to 65.2 of JIS-K-0102. (4) Arsenic According to 61 of JIS-K-0102. (5) Copper According to Prime Minister's Ordinance No. 66. (6) Zinc According to the Notification of the Environment Agency, No. 13, 2-11. (7) Oil According to Notification No. 3 of the Environment Agency.
【００２８】次に、実施例によって本発明を詳細に説明
するが、これは本発明の効果を具体的に説明するための
ものであって、これによって本発明が限定されるもので
はない。 ＜実施例１＞重金属類および油類で汚染された現地発生
土1000kgをミキサーで攪拌し、これに生石灰850kg と珪
酸ナトリウム80kgとを添加して充分に混合し、この混合
系に水400kg を注入し水和反応を起こさせて、重金属類
を珪酸塩として沈殿させ水に不溶とし、さらに、油類を
生成した珪酸カルシウムに吸着させて水に滲み出ないよ
うに処理した。Next, the present invention will be described in detail with reference to examples, but this is for the purpose of specifically explaining the effects of the present invention, and the present invention is not limited thereto. <Example 1> 1000 kg of locally generated soil contaminated with heavy metals and oils was stirred with a mixer, and 850 kg of quicklime and 80 kg of sodium silicate were added and mixed well, and 400 kg of water was injected into the mixed system. Then, a hydration reaction was caused to cause heavy metals to precipitate as silicates to make them insoluble in water, and further, oils were adsorbed to the generated calcium silicate and treated so as not to seep into water.
【００２９】＜実施例２＞重金属類および油類で汚染さ
れた実施例１とは別の現地発生土1000kgをミキサーで攪
拌し、これに生石灰1000kgと珪酸ナトリウム100kg と二
酸化珪素50kgとを添加して充分に混合し、この混合系に
水400kg を注入し水和反応を起こさせて、重金属類を珪
酸塩として沈殿させ水に不溶とし、さらに、油類を生成
した珪酸カルシウムに吸着させて水に滲み出ないように
処理した。<Example 2> Another 1000 kg of locally generated soil contaminated with heavy metals and oils was stirred with a mixer, and 1000 kg of quicklime, 100 kg of sodium silicate and 50 kg of silicon dioxide were added thereto. 400 kg of water is injected into the mixed system to cause a hydration reaction, to precipitate heavy metals as silicates to make them insoluble in water, and to adsorb oils to the generated calcium silicate to form water. To prevent bleeding.
【００３０】＜試験の結果＞前記、実施例１および実施
例２の処理前と処理後の各試料を採取して、前記試験項
目および分析試験方法によって測定し、その結果を次に
示す表１にまとめた。<Results of Test> Each of the samples before and after the treatment in Examples 1 and 2 was collected and measured by the test items and the analytical test method. The results are shown in Table 1 below. Summarized in
【００３１】[0031]
【表１】 表１の中の不検出とは定量限界以下を意味する。実施例
１および実施例２の各項の試験のデーターから判読でき
るように、処理後における試験結果が優れていることが
判る。[Table 1] Non-detection in Table 1 means below the quantification limit. As can be seen from the test data in each section of Example 1 and Example 2, it can be seen that the test results after the treatment are excellent.
【００３２】[0032]
【発明の効果】以上述べたように本発明の土壌の汚染処
理方法は、生石灰を利用するという、処理の手間が掛か
らずに、処理コストが安価で環境に安全な方法で、確実
に、重金属類や油類で汚染された土壌中の重金属類や油
類が、雨水や地下水の中に溶出したり滲み出したりしな
いように処理することができるものである。As described above, the method for treating soil contamination according to the present invention uses a quick lime method, which does not require a complicated process, has a low processing cost, is environmentally safe, and is surely capable of handling heavy metals. Heavy metals and oils in soil contaminated with water and oils can be treated so as not to elute or seep into rainwater or groundwater.
Claims (2)
％の生石灰と生石灰に対して５〜10重量％の珪酸ナトリ
ウムとを添加混合した後、この混合系に土に対して約40
重量％の水を注入して生石灰の水和反応を喚起させ、現
地発生土に含む重金属類を珪酸塩とすることを特徴とし
た土壌の汚染処理方法。1. To a locally generated soil, 50 to 100% by weight of quicklime based on soil and 5 to 10% by weight of sodium silicate based on quicklime are added and mixed. 40
A method for treating soil pollution, characterized by injecting water by weight to induce a hydration reaction of quicklime and converting heavy metals contained in locally generated soil into silicate.
％の生石灰と生石灰に対して５〜10重量％の珪酸ナトリ
ウムとを添加混合した後、この混合系に土に対して約40
重量％の水を注入して生石灰の水和反応を喚起させ、生
成する珪酸カルシウムゲルに、現地発生土に含む油類を
吸着させたことを特徴とする土壌の汚染処理方法。2. Addition of 50 to 100% by weight of quicklime to soil and 5 to 10% by weight of sodium silicate to quicklime are added to the locally generated soil. 40
A method for treating soil contamination, characterized by injecting water by weight to induce a hydration reaction of quicklime, and causing the resulting calcium silicate gel to adsorb oils contained in locally generated soil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25574096A JP2813878B2 (en) | 1996-09-27 | 1996-09-27 | Soil pollution treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25574096A JP2813878B2 (en) | 1996-09-27 | 1996-09-27 | Soil pollution treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10102471A true JPH10102471A (en) | 1998-04-21 |
| JP2813878B2 JP2813878B2 (en) | 1998-10-22 |
Family
ID=17282981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25574096A Expired - Lifetime JP2813878B2 (en) | 1996-09-27 | 1996-09-27 | Soil pollution treatment method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2813878B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011162590A (en) * | 2010-02-05 | 2011-08-25 | Kajima Corp | Ground improving material and ground improving method |
| WO2014007654A1 (en) * | 2012-01-25 | 2014-01-09 | Advanced Agricultural Additives (Nz) Limited | Agricultural additives, compositions and methods |
| CN104845628A (en) * | 2015-04-22 | 2015-08-19 | 清华大学 | Calcium-based liquid curing agent and vanadium-polluted soil in-situ immobilization method |
| JP2021046685A (en) * | 2019-09-17 | 2021-03-25 | 株式会社サン・エンジニア | Underground impermeable wall and underground impermeable wall construction method |
| CN120532459A (en) * | 2025-07-29 | 2025-08-26 | 生态环境部环境规划院 | Biochar-loaded silicate composite material and preparation method and application thereof |
-
1996
- 1996-09-27 JP JP25574096A patent/JP2813878B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011162590A (en) * | 2010-02-05 | 2011-08-25 | Kajima Corp | Ground improving material and ground improving method |
| WO2014007654A1 (en) * | 2012-01-25 | 2014-01-09 | Advanced Agricultural Additives (Nz) Limited | Agricultural additives, compositions and methods |
| AU2013203918B2 (en) * | 2012-01-25 | 2016-01-28 | Advanced Agricultural Additives (Nz) Limited | Agricultural additives, compositions and methods |
| CN104845628A (en) * | 2015-04-22 | 2015-08-19 | 清华大学 | Calcium-based liquid curing agent and vanadium-polluted soil in-situ immobilization method |
| JP2021046685A (en) * | 2019-09-17 | 2021-03-25 | 株式会社サン・エンジニア | Underground impermeable wall and underground impermeable wall construction method |
| CN120532459A (en) * | 2025-07-29 | 2025-08-26 | 生态环境部环境规划院 | Biochar-loaded silicate composite material and preparation method and application thereof |
| CN120532459B (en) * | 2025-07-29 | 2025-11-14 | 生态环境部环境规划院 | Biochar-supported silicate composites, their preparation methods and applications |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2813878B2 (en) | 1998-10-22 |
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