JP2000325936A - Method for cleaning polluted soil containing heavy metal - Google Patents
Method for cleaning polluted soil containing heavy metalInfo
- Publication number
- JP2000325936A JP2000325936A JP11144006A JP14400699A JP2000325936A JP 2000325936 A JP2000325936 A JP 2000325936A JP 11144006 A JP11144006 A JP 11144006A JP 14400699 A JP14400699 A JP 14400699A JP 2000325936 A JP2000325936 A JP 2000325936A
- Authority
- JP
- Japan
- Prior art keywords
- soil
- particles
- heavy metals
- containing heavy
- heavy metal
- 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.)
- Pending
Links
- 239000002689 soil Substances 0.000 title claims abstract description 91
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 74
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000004140 cleaning Methods 0.000 title claims abstract description 27
- 239000002245 particle Substances 0.000 claims abstract description 48
- 239000010419 fine particle Substances 0.000 claims abstract description 34
- 239000000203 mixture Substances 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims 1
- 150000002500 ions Chemical class 0.000 abstract description 20
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 abstract description 12
- 239000007788 liquid Substances 0.000 abstract description 10
- 230000001464 adherent effect Effects 0.000 abstract 1
- 239000002002 slurry Substances 0.000 description 12
- 150000007514 bases Chemical class 0.000 description 9
- 238000000926 separation method Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 102100033040 Carbonic anhydrase 12 Human genes 0.000 description 1
- 102100032566 Carbonic anhydrase-related protein 10 Human genes 0.000 description 1
- 101000867855 Homo sapiens Carbonic anhydrase 12 Proteins 0.000 description 1
- 101000867836 Homo sapiens Carbonic anhydrase-related protein 10 Proteins 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 208000037516 chromosome inversion disease Diseases 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Landscapes
- Processing Of Solid Wastes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、重金属等で汚染さ
れた土壌を洗浄する場合に、重金属を含む微細粒子や重
金属イオンを土壌粒子から完全に剥離して除去すること
ができる汚染土壌の洗浄方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for cleaning contaminated soil which can completely remove fine particles and heavy metal ions containing heavy metals from soil particles when cleaning soil contaminated with heavy metals or the like. About the method.
【０００２】[0002]
【従来の技術】工場跡地等を再開発するに際して、重金
属等で汚染された土壌の処理が大きな社会問題化してい
る。土壌処理の手段として、土壌を洗浄法で浄化する方
法が採用されているが、従来の洗浄法では比較的大きな
土壌粒子に付着した数μｍ以下の重金属を多く含む微細
粒子や重金属イオンを分離できないために、汚染土壌の
完全な洗浄が出来ない場合が多かった。2. Description of the Related Art When redeveloping a factory site or the like, treatment of soil contaminated with heavy metals and the like has become a major social problem. As a method of soil treatment, a method of purifying soil by a washing method is adopted, but conventional washing methods cannot separate fine particles and heavy metal ions containing a large amount of heavy metals of several μm or less attached to relatively large soil particles. As a result, contaminated soil cannot be completely washed in many cases.
【０００３】従来の洗浄法では、通常は攪拌機あるいは
トロンメル等で洗浄してから、液体サイクロン、振動ス
クリーン等で汚染物質を分離しているが、洗浄力が弱い
ために、電気的な吸引力等で、大きな土壌粒子の表面に
付着している土壌粒子や重金属イオンを剥離して、分離
することが出来ないのが実情である。従って、汚染土壌
の洗浄法による除去には除去限界があって、真に清浄な
土壌を得ることが出来ない状況にあった。In the conventional cleaning method, the contaminants are usually separated by a liquid cyclone, a vibrating screen or the like after cleaning with a stirrer or a trommel or the like. Therefore, the fact is that the soil particles and heavy metal ions adhering to the surface of the large soil particles cannot be separated and separated. Therefore, there is a limit to the removal of contaminated soil by the washing method, and it is impossible to obtain truly clean soil.
【０００４】[0004]
【発明が解決しようとする課題】本発明は、上記の実情
に鑑みて成されたものであり、スライムコーテングの状
態にある数μｍ以下の重金属を多く含む微細粒子や重金
属イオンを土壌粒子から剥離、分離して、汚染土壌を真
に清浄な土壌粒子に洗浄できる、重金属を含む汚染土壌
の洗浄方法を提供することを課題にしている。SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and separates fine particles and heavy metal ions containing heavy metals of several μm or less in a slime coating state from soil particles. It is an object of the present invention to provide a method for cleaning contaminated soil containing heavy metals, which can separate and clean contaminated soil into truly clean soil particles.
【０００５】[0005]
【課題を解決するための手段】請求項１の発明による重
金属を含む汚染土壌の洗浄方法は、重金属を含む微細粒
子が付着している土壌粒子と塩基性化合物とを混合して
ｐＨを調整し、次いで、ｐＨが調整された混合物を振動
装置を通過させてから、液体サイクロンに導入すること
を特徴としており、比較的大きな土壌粒子から付着して
いる重金属を含む微細粒子を剥離、分離して真に洗浄さ
れた清浄な土壌粒子を提供している。According to the first aspect of the present invention, there is provided a method for cleaning contaminated soil containing heavy metals, wherein the pH is adjusted by mixing soil particles having fine particles containing heavy metals attached thereto with a basic compound. Then, after passing the pH-adjusted mixture through a vibrator, the mixture is introduced into a hydrocyclone, and fine particles containing heavy metals attached from relatively large soil particles are separated and separated. Provides truly washed and clean soil particles.
【０００６】請求項２の発明による重金属を含む汚染土
壌の洗浄方法は、請求項１の発明による重金属を含む汚
染土壌の洗浄方法において、土壌粒子と塩基性化合物と
の混合物をｐＨ９〜１１のアルカリ領域に処理すること
を特徴としており、重金属を含む微細粒子を比較的大き
な土壌粒子から剥離、分離する効率を向上させている。According to a second aspect of the present invention, there is provided the method for cleaning contaminated soil containing heavy metals according to the first aspect of the present invention, wherein the mixture of soil particles and a basic compound is treated with an alkali having a pH of 9-11. It is characterized in that it is applied to an area, and improves the efficiency of exfoliating and separating fine particles containing heavy metals from relatively large soil particles.
【０００７】請求項３の発明による重金属を含む汚染土
壌の洗浄方法は、請求項１又は２の発明による重金属を
含む汚染土壌の洗浄方法において、混合物を通過させる
振動装置として超音波発生装置を用いることを特徴とし
ており、重金属を含む微細粒子が超音波によって自己振
動を起こさせることで、比較的大きな土壌粒子からの剥
離、分離する効率を向上させている。According to a third aspect of the present invention, there is provided the method for cleaning contaminated soil containing heavy metals according to the first or second aspect of the present invention, wherein an ultrasonic generator is used as a vibrating device for passing the mixture. It is characterized by the fact that fine particles containing heavy metals cause self-vibration by ultrasonic waves, thereby improving the efficiency of separation and separation from relatively large soil particles.
【０００８】[0008]
【発明の実施の形態】本発明による重金属を含む汚染土
壌の洗浄方法は、基本的に、重金属を含む微細粒子が付
着している土壌粒子と塩基性化合物とを混合してｐＨを
調整し、次いで、ｐＨが調整された混合物を振動装置に
導いてこれを通過させてから、液体サイクロンに導入す
ることを特徴としている。発明者等は、汚染土壌を分析
検討している過程で、スライムコーテング状態にある土
壌粒子は、比較的大きな土壌粒子の表面に数μｍ以下の
重金属を多く含む微細粒子が分子結合的に電気的な吸引
力によって付着していることを解明した。そこで、本発
明は、汚染している土壌粒子をｐＨがアルカリ領域にあ
る状態の中で処理をすることで、土壌粒子の電気的な荷
電による付着力を弱めながら、超音波発信子による振動
を加えることによって微細粒子及び重金属イオンを液側
に分散することを基本にしている。以下、図面に基づい
て実施の形態を説明する。BEST MODE FOR CARRYING OUT THE INVENTION The method for cleaning contaminated soil containing heavy metals according to the present invention basically adjusts the pH by mixing soil particles with fine particles containing heavy metals and a basic compound, Then, the mixture whose pH has been adjusted is guided to a vibrator, passed through the vibrator, and then introduced into a liquid cyclone. During the process of analyzing and examining contaminated soil, the inventors found that, in the slime-coated soil particles, fine particles containing a large amount of heavy metals of several μm or less were electrically bonded to the surface of relatively large soil particles by molecular bonding. It was clarified that the particles were attached by an appropriate suction force. Therefore, the present invention treats contaminated soil particles in a state where the pH is in an alkaline region, thereby reducing the adhesive force of the soil particles due to electric charging and reducing the vibration by the ultrasonic oscillator. The addition is based on dispersing fine particles and heavy metal ions to the liquid side. Hereinafter, embodiments will be described with reference to the drawings.
【０００９】図１は、本発明による重金属を含む汚染土
壌の洗浄方法を説明するための工程図である。図におい
て、１は、汚染土壌スラリーであり、スラリー濃度を１
０〜３０％に調整している。２は、塩基性化合物であ
り、本実施の形態では水酸化ナトリウムを使用してい
る。汚染土壌スラリー１は、スラリーポンプによってラ
インミキサー３に導入されるが、導入の直前に水酸化ナ
トリウム２を添加して、汚染土壌スラリー１のｐＨを９
〜１１になるように調整している。FIG. 1 is a process diagram illustrating a method for cleaning contaminated soil containing heavy metals according to the present invention. In the figure, 1 is a contaminated soil slurry, and the slurry concentration is 1
It is adjusted to 0-30%. Reference numeral 2 denotes a basic compound, and in this embodiment, sodium hydroxide is used. The contaminated soil slurry 1 is introduced into the line mixer 3 by a slurry pump. Immediately before the introduction, the pH of the contaminated soil slurry 1 is adjusted to 9 by adding sodium hydroxide 2.
It is adjusted to be ~ 11.
【００１０】汚染土壌スラリー１のｐＨを９〜１１にな
るように調整することは、以下の事項を根拠にしてい
る。上述したように、土壌粒子の表面に付着している重
金属を多量に含有する微細粒子或いは重金属イオンは電
荷を帯びており、土壌粒子の表面と微細粒子或いは重金
属イオンとの電荷量に比例する電気的な吸引力によっ
て、その結合力を強めているので、本発明による汚染土
壌の洗浄方法は、汚染土壌スラリー１をアルカリ領域の
状態に置いて土壌粒子表面にある電荷を正に高めていく
ことで、付着力を弱めて行くことを指向している。The adjustment of the pH of the contaminated soil slurry 1 to 9 to 11 is based on the following matters. As described above, the fine particles or heavy metal ions containing a large amount of heavy metal attached to the surface of the soil particles are charged, and the electric charge is proportional to the charge amount between the surface of the soil particles and the fine particles or heavy metal ions. The contaminated soil cleaning method according to the present invention increases the electric charge on the surface of the soil particles by placing the contaminated soil slurry 1 in an alkaline region, since the binding force is strengthened by a typical suction force. The aim is to reduce the adhesive force.
【００１１】しかしながら、ｐＨ１１を越えたアルカリ
性の強い領域を形成するためには、水酸化ナトリウムの
ような塩基性化合物を大量に添加させる必要があり、併
せて強度のアルカリ性処理剤はその取り扱いにおいても
問題を伴うものであるから、アルカリ領域の上限値はｐ
Ｈ１１に定めている。同様に、アルカリ性を弱めて行く
と電気的な吸引力の低減が不足することから、アルカリ
領域の下限値は、現状における汚染土壌の状況を勘案し
てｐＨ９に定めることで、所望の電荷状態が形成される
ようにしている。However, in order to form a strongly alkaline region exceeding pH 11, it is necessary to add a large amount of a basic compound such as sodium hydroxide. Because of the problem, the upper limit of the alkaline region is p
H11. Similarly, when the alkalinity is weakened, the reduction of the electric attraction force is insufficient. Therefore, the lower limit of the alkaline region is set to pH 9 in consideration of the current situation of the contaminated soil, so that the desired charge state can be reduced. To be formed.
【００１２】ラインミキサーで混合されたｐＨ９〜１１
の汚染土壌スラリーは、振動装置として用意された超音
波発生装置４に送られ、これを通過することで振動が与
えられて大きな土壌粒子の表面に付着している重金属を
多量に含有する微細粒子或いは重金属イオンの剥離を促
進される。PH 9-11 mixed with a line mixer
Is sent to an ultrasonic generator 4 prepared as a vibrator, and is passed through the vibrator to be vibrated to give fine particles containing a large amount of heavy metal attached to the surface of large soil particles. Alternatively, the separation of heavy metal ions is promoted.
【００１３】超音波発生装置４を通過した汚染土壌スラ
リーは、液体サイクロン５に導入される。液体サイクロ
ン５では、電気的に脱着し易くなった重金属を多量に含
有する微細粒子或いは重金属イオンが、大きな土壌粒子
の表面から剥離、分離される。従って、液体サイクロン
５からは、清浄土壌６と重金属を多量に含有する微細粒
子或いは重金属イオンとが別個に取り出される。The contaminated soil slurry that has passed through the ultrasonic generator 4 is introduced into the hydrocyclone 5. In the hydrocyclone 5, fine particles or heavy metal ions containing a large amount of heavy metal that has become easily electrically desorbed are separated and separated from the surface of large soil particles. Therefore, the clean soil 6 and the fine particles or heavy metal ions containing a large amount of heavy metals are separately taken out from the liquid cyclone 5.
【００１４】清浄土壌６は、その表面にスライムコーテ
ング状態に付着されていた重金属を多量に含有する微細
粒子或いは重金属イオンを取り除かれているので、完全
に洗浄された状態になっている。The clean soil 6 has been completely washed since fine particles or heavy metal ions containing a large amount of heavy metal attached to its surface in a slime-coated state have been removed.
【００１５】図２は、液体サイクロンの略図的な断面図
であり、重金属を多量に含有する微細粒子或いは重金属
イオンが、大きな土壌粒子の表面から剥離、分離される
状態を表示している。液体サイクロン５には、超音波発
生装置４が付属されており、ｐＨ９〜１１のアルカリ領
域にある汚染土壌スラリーは、超音波発生装置4を通過
して液体サイクロンに導入される。FIG. 2 is a schematic sectional view of the hydrocyclone, showing a state in which fine particles or heavy metal ions containing a large amount of heavy metal are separated and separated from the surface of large soil particles. An ultrasonic generator 4 is attached to the liquid cyclone 5, and contaminated soil slurry in the alkaline region having a pH of 9 to 11 is introduced into the liquid cyclone through the ultrasonic generator 4.
【００１６】汚染土壌スラリーは、ｐＨ９〜１１のアル
カリ領域にあるので、重金属を多量に含有する微細粒子
或いは重金属イオンが付着している土壌粒子の表面電荷
が正に大になる。従って、重金属を多量に含有する微細
粒子或いは重金属イオンは土壌粒子から電気的に離脱し
易い状態にあり、これに加えて超音波発生装置４を通過
する際に与えられる振動によって、比較的大きな土壌粒
子６と重金属を多量に含有する微細粒子或いは重金属イ
オン７とは剥離状態に近くなっている。Since the contaminated soil slurry is in the alkaline region of pH 9 to 11, the surface charge of fine particles containing a large amount of heavy metal or soil particles to which heavy metal ions are attached becomes positively large. Therefore, the fine particles or heavy metal ions containing a large amount of heavy metal are in a state of being easily detached electrically from the soil particles, and in addition to this, the vibration given when passing through the ultrasonic generator 4 causes the relatively large soil. The particles 6 and the fine particles containing a large amount of heavy metal or the heavy metal ions 7 are almost in a separated state.
【００１７】液体サイクロン内の水流は、外側に下向す
る１次回転流８を有し、内側に上向する２次反転流９を
有している。従って、汚染土壌スラリーは、液体サイク
ロン５に導入されてから液体サイクロン内の水流によっ
て、比較的大きな土壌粒子６と重金属を多量に含有する
微細粒子或いは重金属イオン７とに分離される。The water flow in the hydrocyclone has a primary rotating flow 8 directed outward and a secondary reversing flow 9 directed upward. Therefore, the contaminated soil slurry is separated into relatively large soil particles 6 and fine particles or heavy metal ions 7 containing a large amount of heavy metal by the water flow in the liquid cyclone after being introduced into the hydrocyclone 5.
【００１８】即ち、質量の大きい土壌粒子６は、１次回
転流８に乗ってサイクロン壁に遠心力で押し付けられな
がらサイクロンの下方に落下し、サイクロンの下方から
取り出される。一方、比較的大きな土壌粒子の以上のよ
うな水中での振動と移動とによって、表面に付着してい
た重金属を多量に含有する微細粒子或いは重金属イオン
７は、水中に分散されることになる。水中に分散した粒
子類は、サイクロン中央部に発生する上向する２次反転
流９に乗って上方に水と共に移動してサイクロンの上部
から取り出されて排出される。That is, the soil particles 6 having a large mass fall on the primary rotating flow 8 while being pressed against the cyclone wall by centrifugal force, fall below the cyclone, and are taken out from below the cyclone. On the other hand, due to the above-described vibration and movement of relatively large soil particles in water, fine particles or heavy metal ions 7 containing a large amount of heavy metal attached to the surface are dispersed in water. The particles dispersed in the water move upward with the water on the upward reversal flow 9 generated in the center of the cyclone, are taken out from the upper part of the cyclone, and are discharged.
【００１９】以上のように、本発明による重金属を含む
汚染土壌の洗浄方法は、スライムコーテング状態の汚染
土壌粒子の実態を分析検討することによって、重金属を
多量に含有する微細粒子或いは重金属イオンが分離でき
ない要因を追求することで問題点を明らかにし、コンパ
クトな装置を用いて、重金属を含む汚染土壌のより完全
な分離による洗浄と洗浄時間の短縮を図っている。As described above, the method for cleaning contaminated soil containing heavy metals according to the present invention separates fine particles or heavy metal ions containing a large amount of heavy metals by analyzing and examining the actual conditions of contaminated soil particles in a slime-coated state. The problem is clarified by pursuing the factors that cannot be achieved, and the cleaning and shortening of the cleaning time by compact separation of the contaminated soil containing heavy metals are being attempted by using a compact apparatus.
【００２０】以上、本発明を実施の形態に基づいて詳細
に説明してきたが、本発明による重金属を含む汚染土壌
の洗浄方法は、重金属を含む微細粒子が付着している土
壌粒子と塩基性化合物とを混合してｐＨを調整し、次い
で、ｐＨが調整された混合物を振動装置を通過させてか
ら、液体サイクロンに導入することを基本の趣旨にして
いるものであるから、本発明は上記実施の形態に何等限
定されるものでなく、本発明の趣旨を逸脱しない範囲に
おいて種々の変更も発明に含まれることは当然である。Although the present invention has been described in detail with reference to the embodiments, the method for cleaning contaminated soil containing heavy metals according to the present invention relates to a method for removing soil particles containing fine particles containing heavy metals and a basic compound. And the pH of the mixture is adjusted, and then the pH-adjusted mixture is passed through a vibrator and then introduced into a liquid cyclone. It should be understood that the present invention is not limited to the embodiments described above, and that various changes are included in the invention without departing from the spirit of the present invention.
【００２１】[0021]
【発明の効果】請求項１の発明による重金属を含む汚染
土壌の洗浄方法は、重金属を含む微細粒子が付着してい
る土壌粒子と塩基性化合物とを混合してｐＨを調整し、
次いで、ｐＨが調整された混合物を振動装置を通過させ
てから、液体サイクロンに導入しているので、コンパク
トな装置を用いて比較的大きな土壌粒子から付着してい
る重金属を含む微細粒子や重金属イオンを剥離、分離し
て、完全に清浄な土壌粒子に短時間で洗浄できる効果を
奏している。According to the method for cleaning contaminated soil containing heavy metals according to the first aspect of the present invention, the pH is adjusted by mixing soil particles to which fine particles containing heavy metals are attached with a basic compound.
Next, since the pH-adjusted mixture is passed through the vibrating device and then introduced into the liquid cyclone, fine particles containing heavy metals and heavy metal ions attached from relatively large soil particles using a compact device are used. Has the effect of being able to separate and clean the soil particles completely in a short time.
【００２２】請求項２の発明による重金属を含む汚染土
壌の洗浄方法は、請求項１の発明による重金属を含む汚
染土壌の洗浄方法において、土壌粒子と塩基性化合物と
の混合物をｐＨ９〜１１のアルカリ領域に処理すること
で、重金属を含む微細粒子を比較的大きな土壌粒子から
剥離、分離する効率を向上させる効果を奏している。The method for cleaning contaminated soil containing heavy metals according to the second aspect of the present invention is the method for cleaning contaminated soil containing heavy metals according to the first aspect of the present invention, wherein a mixture of soil particles and a basic compound is adjusted to an alkaline pH of 9-11. By treating the region, the effect of improving the efficiency of separating and separating fine particles containing heavy metals from relatively large soil particles is obtained.
【００２３】請求項３の発明による重金属を含む汚染土
壌の洗浄方法は、請求項１又は２の発明による重金属を
含む汚染土壌の洗浄方法において、混合物を通過させる
振動装置として超音波発生装置を用いているので、重金
属を含む微細粒子が超音波によって自己振動を起こさせ
ることで、比較的大きな土壌粒子からの剥離、分離する
効率をさらに向上させる効果を奏している。According to a third aspect of the present invention, there is provided a method for cleaning contaminated soil containing heavy metals according to the first or second aspect of the present invention, wherein an ultrasonic generator is used as a vibration device for passing the mixture. Therefore, the fine particles containing heavy metals generate self-vibration by ultrasonic waves, which has the effect of further improving the efficiency of separation and separation from relatively large soil particles.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明による重金属を含む汚染土壌の洗浄方法
の工程図FIG. 1 is a process diagram of a method for cleaning contaminated soil containing heavy metals according to the present invention.
【図２】微細粒子を土壌粒子から剥離、分離する液体サ
イクロンの断面図FIG. 2 is a sectional view of a hydrocyclone that separates and separates fine particles from soil particles.
【符号の説明】 １ 汚染土壌スラリー、 ２ 塩基性化合物、 ３ ラ
インミキサー、４ 振動装置、 ５ 液体サイクロン、
６ 洗浄された土壌粒子、７ 重金属微細粒子、 ８
１次回転流、 ９ ２次反転流、[Explanation of symbols] 1 Contaminated soil slurry, 2 Basic compound, 3 Line mixer, 4 vibrator, 5 Hydrocyclone,
6 washed soil particles, 7 heavy metal fine particles, 8
Primary rotation flow, 9 secondary inversion flow,
───────────────────────────────────────────────────── フロントページの続き (72)発明者 辻 哲 東京都港区芝浦一丁目２番３号 清水建設 株式会社内 Ｆターム(参考） 4D004 AA41 AB03 CA10 CA12 CA15 CA35 CA40 CB05 CB50 CC11 CC12 DA03 DA20 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tetsu Tsuji 1-3-2 Shibaura, Minato-ku, Tokyo Shimizu Corporation F-term (reference) 4D004 AA41 AB03 CA10 CA12 CA15 CA35 CA40 CB05 CB50 CC11 CC12 DA03 DA20
Claims (3)
重金属を含む微細粒子を分離する重金属を含む汚染土壌
の洗浄方法であって、重金属を含む微細粒子が付着して
いる土壌粒子と塩基性化合物とを混合してｐＨを調整
し、次いで該混合物は振動装置を通過させて液体サイク
ロンに導入されることを特徴とする重金属を含む汚染土
壌の洗浄方法。1. A method for cleaning contaminated soil containing heavy metal, comprising separating fine particles containing heavy metal from relatively large soil particles, the method comprising the steps of: A method for cleaning contaminated soil containing heavy metals, wherein the pH is adjusted by mixing with a compound, and then the mixture is introduced into a hydrocyclone through a vibrator.
処理することを特徴とする請求項１に記載の重金属を含
む汚染土壌の洗浄方法。2. The method for cleaning contaminated soil containing heavy metals according to claim 1, wherein the mixture is treated in an alkaline region having a pH of 9 to 11.
特徴とする請求項１又は２に記載の重金属を含む汚染土
壌の洗浄方法。3. The method for cleaning contaminated soil containing heavy metals according to claim 1, wherein the vibration device is an ultrasonic generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11144006A JP2000325936A (en) | 1999-05-24 | 1999-05-24 | Method for cleaning polluted soil containing heavy metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11144006A JP2000325936A (en) | 1999-05-24 | 1999-05-24 | Method for cleaning polluted soil containing heavy metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000325936A true JP2000325936A (en) | 2000-11-28 |
Family
ID=15352130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11144006A Pending JP2000325936A (en) | 1999-05-24 | 1999-05-24 | Method for cleaning polluted soil containing heavy metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000325936A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010029809A (en) * | 2008-07-30 | 2010-02-12 | Okumura Corp | Polluted soil purifying method |
| JP2010029808A (en) * | 2008-07-30 | 2010-02-12 | Okumura Corp | Polluted soil purifying method |
| JP2012081386A (en) * | 2010-10-07 | 2012-04-26 | Shimizu Corp | Washing method of arsenic-contaminated soil |
| JP2015171709A (en) * | 2014-02-24 | 2015-10-01 | 清水建設株式会社 | Arsenic-contaminated soil washing method |
| CN105032908A (en) * | 2015-06-23 | 2015-11-11 | 江苏麦可博生物环保工程技术有限公司 | Device and technological method for repairing organic contaminated soil and underground water |
| JP2016138846A (en) * | 2015-01-29 | 2016-08-04 | 西松建設株式会社 | Classification cleaning and volume reduction processing method for radioactive cesium-containing sediment |
-
1999
- 1999-05-24 JP JP11144006A patent/JP2000325936A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010029809A (en) * | 2008-07-30 | 2010-02-12 | Okumura Corp | Polluted soil purifying method |
| JP2010029808A (en) * | 2008-07-30 | 2010-02-12 | Okumura Corp | Polluted soil purifying method |
| JP2012081386A (en) * | 2010-10-07 | 2012-04-26 | Shimizu Corp | Washing method of arsenic-contaminated soil |
| JP2015171709A (en) * | 2014-02-24 | 2015-10-01 | 清水建設株式会社 | Arsenic-contaminated soil washing method |
| JP2016138846A (en) * | 2015-01-29 | 2016-08-04 | 西松建設株式会社 | Classification cleaning and volume reduction processing method for radioactive cesium-containing sediment |
| CN105032908A (en) * | 2015-06-23 | 2015-11-11 | 江苏麦可博生物环保工程技术有限公司 | Device and technological method for repairing organic contaminated soil and underground water |
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