JP2000136373A - Metal-treating agent - Google Patents
Metal-treating agentInfo
- Publication number
- JP2000136373A JP2000136373A JP10324573A JP32457398A JP2000136373A JP 2000136373 A JP2000136373 A JP 2000136373A JP 10324573 A JP10324573 A JP 10324573A JP 32457398 A JP32457398 A JP 32457398A JP 2000136373 A JP2000136373 A JP 2000136373A
- Authority
- JP
- Japan
- Prior art keywords
- metal
- acid
- treating agent
- present
- phosphoric acid
- 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
Landscapes
- Processing Of Solid Wastes (AREA)
- Removal Of Specific Substances (AREA)
- Fire-Extinguishing Compositions (AREA)
- Treating Waste Gases (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、廃水中や、焼却
灰、煤塵、鉱滓、汚泥、土壌、シュレッダーダスト等の
固体状廃棄物中に存在する有害な金属等を捕集除去した
り、固定化して無害化することのできる金属処理剤に関
する。The present invention relates to the collection and removal of harmful metals and the like in waste water and solid waste such as incineration ash, dust, slag, sludge, soil, shredder dust and the like. The present invention relates to a metal treatment agent that can be converted into harmless.
【０００２】[0002]
【従来の技術】工場や研究施設から排出される廃水や、
ゴミ焼却場等で生じる焼却灰や煤塵、鉱山から排出され
る鉱滓、廃水処理の際に用いられる活性汚泥、汚染され
た土壌等の固体状廃棄物、或いはゴミ焼却場で排出され
る排煙等の如き廃ガス中には種々の金属が含有されてお
り、水銀、カドミウム、鉛、亜鉛、銅、クロム等の人体
に有害な重金属が多量に含有されている場合も多い。金
属を含む廃水が河川等に放流されると重大な環境問題を
生じるとともに、固体状廃棄物から溶出した金属による
地下水、河川、海水等の汚染や、金属を含む廃ガスによ
る大気汚染等も大きな社会問題となっている。2. Description of the Related Art Wastewater discharged from factories and research facilities,
Incinerated ash and dust generated in garbage incineration plants, slag discharged from mines, activated sludge used in wastewater treatment, solid waste such as contaminated soil, or smoke discharged in garbage incineration plants Various metals are contained in the waste gas as described above, and heavy metals harmful to the human body such as mercury, cadmium, lead, zinc, copper, and chromium are often contained in large amounts. Discharge of wastewater containing metals into rivers and the like causes serious environmental problems, and pollution of groundwater, rivers, seawater, etc. by metals eluted from solid waste, and air pollution by waste gases containing metals are large. It has become a social problem.
【０００３】このため従来より、廃水、固体状廃棄物、
廃ガス等を金属処理剤で処理することが提案されてお
り、金属処理剤としては水銀やカドミウム等の捕集力に
優れたジチオカルバミン酸型の官能基を有する化合物が
広く利用されている。このようなジチオカルバミン酸型
の金属処理剤としては、アミン類に二硫化炭素を反応さ
せて、ジチオカルバミン酸基やその塩を形成した化合物
が広く知られている。[0003] For this reason, conventionally, wastewater, solid waste,
It has been proposed to treat a waste gas or the like with a metal treating agent. As the metal treating agent, compounds having a dithiocarbamic acid type functional group having excellent trapping power, such as mercury and cadmium, are widely used. As such a dithiocarbamic acid-type metal treating agent, compounds in which an amine is reacted with carbon disulfide to form a dithiocarbamic acid group or a salt thereof are widely known.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、ジチオ
カルバミン酸型の官能基を有する従来の金属処理剤は、
水銀やカドミウム等の金属に対する捕集力は優れるもの
の、鉛や亜鉛等の金属に対する捕集力が低く、これらを
含む場合には充分な処理が行い難かった。また固体状廃
棄物中の金属は、金属処理剤が捕集して固定化し、固体
状廃棄物中のから溶出しないように処理するものであ
り、金属処理剤で処理した固体状廃棄物は、そのまま或
いは更にコンクリート等で固めた後に最終処分される。
しかしながら従来より広く用いられているジチオカルバ
ミン酸型の官能基を有する金属処理剤は酸性条件下での
金属に対する結合力が弱く、このため処理後の固体状廃
棄物が酸性雨等に晒された場合、金属処理剤と金属との
結合が外れて固体状廃棄物中から金属が溶出する虞れが
あった。However, conventional metal treating agents having a dithiocarbamic acid type functional group are:
Although the trapping power for metals such as mercury and cadmium is excellent, the trapping power for metals such as lead and zinc is low, and when these are contained, it is difficult to perform sufficient treatment. In addition, the metal in the solid waste is treated by collecting and fixing the metal treatment agent so as not to be eluted from the solid waste, and the solid waste treated with the metal treatment agent is: It is finally disposed as it is or after it is further hardened with concrete.
However, metal treatment agents having a dithiocarbamic acid-type functional group, which has been widely used, have a weak binding force to metals under acidic conditions, so that solid waste after treatment is exposed to acid rain etc. In addition, there is a risk that the bond between the metal treating agent and the metal may be released and the metal may be eluted from the solid waste.
【０００５】本発明は上記課題を解決するためになされ
たもので、水銀やカドミウム等の金属に対する捕集力に
優れるとともに、鉛や亜鉛等の金属に対する捕集力にも
優れ、しかも酸性条件下における金属との結合力に優れ
た金属処理剤を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has an excellent collecting ability for metals such as mercury and cadmium, and also has an excellent collecting ability for metals such as lead and zinc, and furthermore, under acidic conditions. An object of the present invention is to provide a metal treating agent excellent in bonding strength to a metal in the above.
【０００６】[0006]
【課題を解決するための手段】即ち、本発明の金属処理
剤は、チオカルボニル化合物のリン酸類の塩よりなるこ
とを特徴とする。That is, the metal treating agent of the present invention comprises a salt of a phosphoric acid of a thiocarbonyl compound.
【０００７】[0007]
【発明の実施の形態】本発明金属処理剤は、チオカルボ
ニル化合物にリン酸類を混合することにより得られる。
リン酸類としては、リン酸（オルトリン酸）、亜リン
酸、次亜リン酸、ポリリン酸等が挙げられる。BEST MODE FOR CARRYING OUT THE INVENTION The metal treating agent of the present invention can be obtained by mixing phosphoric acids with a thiocarbonyl compound.
Examples of the phosphoric acids include phosphoric acid (orthophosphoric acid), phosphorous acid, hypophosphorous acid, polyphosphoric acid, and the like.
【０００８】一方、上記チオカルボニル化合物として
は、例えばチオアセトフェノン、チオベンゾフェノン、
チオアクリドン等のチオケトン類；チオ酢酸、チオ安息
香酸、チオプロピオン酸、チオ酪酸、チオ蟻酸等のチオ
酸類、チオベンズアミド、チオアセトアミド、チオアセ
トアニリド等のチオ酸アミド類；エチルチオ尿素、エチ
レンチオ尿素、フェニルチオ尿素、トリメチルチオ尿
素、チオアクリドン、３−チオウラゾール、２−チオウ
ラミル、４−チオウラミル、ジフェニルチオ尿素、チオ
尿素、グアニルチオ尿素、アリルチオ尿素、メチルチオ
尿素、ジメチルチオ尿素、ジエチルチオ尿素、チオアセ
タゾン等のチオ尿素類；フェニルチオウレタン、チオウ
レタン等のチオウレタン類；1,3,4-チオオキサジアロゾ
ン−５、チオオキサミド、チオオキサミド酸、ジチオオ
キサミド、ジチゾン、チオカルバジド、1,5-ジアセチル
チオカルバジド、１−フェニルチオカルバジド、1,5-ジ
フェニルチオカルバジド、1-メチル-1- フェニルチオカ
ルバジド、チオカルバミン酸メチル、チオカルボスチリ
ル、チオクマゾン、２−チオクマリン、チオクモチアゾ
ン、チオサッカリン、チオシアヌル酸、チオシアン酸、
チオバルビソル酸、チオビウレット、５−フェニルチオ
ビウレット、1,5-ジフェニルチオビウレット、２−チオ
ヒダントイン、Ｎ，Ｎ′−ジメチルチオヒダントイン、
３−Ｎ−ｐ−トリルチオヒダントイン、１−Ｎ−アセチ
ルチオヒダントイン、４−チオヒダントイン、チオピリ
ン、γ−チオピロン等、及びチオ塩類としてチオグリコ
ール酸が挙げられる。On the other hand, the thiocarbonyl compounds include, for example, thioacetophenone, thiobenzophenone,
Thioketones such as thioacridone; thioacids such as thioacetic acid, thiobenzoic acid, thiopropionic acid, thiobutyric acid, and thioformic acid; thioamides such as thiobenzamide, thioacetamide, and thioacetanilide; ethylthiourea, ethylenethiourea, and phenylthiourea Thioureas such as trimethylthiourea, thioacridone, 3-thiourazole, 2-thiouramil, 4-thiouramil, diphenylthiourea, thiourea, guanylthiourea, allylthiourea, methylthiourea, dimethylthiourea, diethylthiourea and thioacetazone; phenylthio Thiourethanes such as urethane and thiourethane; 1,3,4-thiooxadialozone-5, thiooxamide, thiooxamic acid, dithiooxamide, dithizone, thiocarbazide, 1,5-diacetylthiocarbazide, 1-f Enylthiocarbazide, 1,5-diphenylthiocarbazide, 1-methyl-1-phenylthiocarbazide, methyl thiocarbamate, thiocarbostyril, thiocoumazone, 2-thiocoumarin, thiocoumotiazone, thiosaccharin, thiocyanuric acid, thiocyanic acid ,
Thiobarbisolic acid, thiobiuret, 5-phenylthiobiuret, 1,5-diphenylthiobiuret, 2-thiohydantoin, N, N'-dimethylthiohydantoin,
3-Np-tolylthiohydantoin, 1-N-acetylthiohydantoin, 4-thiohydantoin, thiopyrine, γ-thiopyrone, and the like, and thioglycolic acid as thio salts.
【０００９】上記チオカルボニル化合物とリン酸類と
は、５〜１５０℃で１〜１０時間混合することにより本
発明の金属処理剤を得ることができる。チオカルボニル
化合物とリン酸類との混合比は、モル比でチオカルボニ
ル化合物：リン酸類＝１：０．３〜１：５、特に１：１
〜１：３が好ましい。チオカルボニル化合物とリン酸類
とを反応せしめるに際し、チオカルボニル化合物、リン
酸類ともに、二種以上の異なる化合物を混合して用いる
ことができる。The metal treating agent of the present invention can be obtained by mixing the above thiocarbonyl compound and phosphoric acid at 5 to 150 ° C. for 1 to 10 hours. The mixing ratio of the thiocarbonyl compound and the phosphoric acid is thiocarbonyl compound: phosphoric acid = 1: 0.3 to 1: 5, particularly 1: 1 in molar ratio.
１ ： 1: 3 is preferred. In reacting the thiocarbonyl compound with the phosphoric acid, two or more different compounds can be used as a mixture of the thiocarbonyl compound and the phosphoric acid.
【００１０】本発明の金属処理剤は、廃水に添加して廃
水中の金属を除去する方法、固体状廃棄物に添加し、固
体状廃棄物中の金属を固定化する方法、ガス状の金属を
含む廃ガスに添加し、廃ガス中の金属を捕集する方法等
に利用することができる。[0010] The metal treating agent of the present invention is added to wastewater to remove metals in the wastewater, added to solid waste to fix the metal in the solid waste, gaseous metal. Can be used for a method of collecting metals in the waste gas and the like.
【００１１】本発明の金属処理剤により廃水処理を行う
場合、本発明処理剤を液状又は粉末状のまま、或いは水
等に溶解もしくは分散させて廃水に添加すれば良い。本
発明処理剤を添加後、廃水に含まれる金属を本発明処理
剤が捕集して生成したフロックを分離除去した後の廃水
は、河川等に放流することができる。When treating wastewater with the metal treating agent of the present invention, the treating agent of the present invention may be added to the wastewater in the form of a liquid or powder, or dissolved or dispersed in water or the like. After adding the treating agent of the present invention, the wastewater from which the floc generated by collecting the metal contained in the wastewater by the treating agent of the present invention is separated and removed can be discharged to a river or the like.
【００１２】本発明の金属処理剤による処理対象となる
固体状廃棄物としては、例えばゴミ焼却場において生成
する焼却灰や煤塵、鉱滓、汚泥、土壌、シュレッダーダ
スト等が挙げられる。固体状廃棄物が、集塵された焼却
灰や煤塵、鉱滓、汚泥、土壌、シュレッダーダスト等の
場合、これらの廃棄物に本発明の処理剤を液状又は粉末
状のまま添加したり、水溶液等として添加したり噴霧
し、混練する等の方法により処理することができる。ま
た煤塵や廃ガスの場合、焼却炉における焼却工程中、例
えば煙路に本発明の金属処理剤の溶液等を噴霧する等に
よって本発明の処理剤と煤塵とを接触させ、処理後の煤
塵をバグフィルターで集塵する等の方法を採用すること
ができる。The solid waste to be treated by the metal treating agent of the present invention includes, for example, incinerated ash, dust, slag, sludge, soil, shredder dust and the like generated in a garbage incineration plant. When the solid waste is collected incinerated ash, dust, slag, sludge, soil, shredder dust, etc., the treating agent of the present invention may be added to these wastes in a liquid or powder form, or in an aqueous solution. And spraying, kneading and the like. In the case of dust or waste gas, during the incineration process in an incinerator, the treatment agent of the present invention is brought into contact with the dust, for example, by spraying a solution of the metal treatment agent of the present invention into a flue, and the treated dust is removed. A method such as dust collection with a bag filter can be adopted.
【００１３】本発明において、廃水や固体状廃棄物、或
いは排煙等の廃棄物に対する金属処理剤の添加方法は特
に限定されず、例えば上記したような方法によって本発
明処理剤と廃棄物とを接触させることにより、これらの
廃棄物中の金属を除去したり固定化して廃棄物を無害化
できる。尚、金属捕集剤の廃水等に対する添加量は、廃
水等に含まれる金属量等の量によっても異なるが、一般
に、廃水に対しては０．５〜１００ｍｇ／ｌ、固体状廃
棄物の場合は０．１〜３０重量％、廃ガスの場合は０．
５〜２０００ｍｇ／Ｎｍ3 程度が好ましい。In the present invention, the method of adding the metal treating agent to wastewater, solid waste, or waste such as flue gas is not particularly limited. For example, the treating agent of the present invention and the waste can be mixed by the above-described method. By contact, the metal in these wastes can be removed or immobilized to make the wastes harmless. The amount of the metal trapping agent added to the wastewater or the like varies depending on the amount of the metal contained in the wastewater or the like, but is generally 0.5 to 100 mg / l for the wastewater. Is 0.1 to 30% by weight, and in the case of waste gas, 0.1 to 30% by weight.
About 5 to 2000 mg / Nm 3 is preferable.
【００１４】本発明の金属処理剤によって処理した飛
灰、鉱滓、土壌、汚泥等の固体状廃棄物や、廃水処理の
際に生じたフロックのスラッジ等の廃棄物は、必要に応
じて処理後の廃棄物をセメントで固めて最終処分しても
良い。金属処理剤で処理後の廃棄物をセメント等で固め
て最終処分する場合、本発明処理剤で処理した廃棄物は
従来法に比べ、セメントの使用量が少ない場合でも、廃
棄物中の金属が再溶出して二次汚染を生じる等の虞れが
少ない。Solid waste such as fly ash, slag, soil and sludge treated with the metal treating agent of the present invention, and waste such as floc sludge generated in the treatment of wastewater may be treated as necessary. May be solidified with cement for final disposal. When the waste treated with the metal treating agent is solidified with cement or the like and finally disposed of, the waste treated with the treating agent of the present invention can reduce the amount of metal in the waste compared to the conventional method, even when the amount of cement used is small. There is little risk of secondary elution due to re-elution.
【００１５】[0015]
【実施例】以下、実施例を挙げて本発明を更に詳細に説
明する。尚、実施例、比較例において用いた処理剤の組
成は、以下の通りである。EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples. The compositions of the treating agents used in Examples and Comparative Examples are as follows.
【００１６】金属処理剤Ａ（本発明品） チオ尿素１モルにリン酸２．０モルを混合して得たチオ
尿素のリン酸塩。 金属処理剤Ｂ（本発明品） エチレンチオ尿素１モルに亜リン酸０．５モルを混合し
て得たエチレンチオ尿素の亜リン酸塩。 金属処理剤Ｃ（本発明品） チオ尿素１モルに次亜リン酸２．０モルを混合して得た
チオ尿素の次亜リン酸塩。 金属処理剤Ｄ（本発明品） ジチゾン１モルにリン酸２．０モルを混合して得たジチ
ゾンのリン酸塩。 金属処理剤Ｅ（本発明品） エチレンチオ尿素１モルに亜リン酸１．０モルを反応さ
せて得たエチレンチオ尿素の亜リン酸塩。 金属捕集剤Ｆ（本発明品） グアニルチオ尿素１モルに亜リン酸２．０モルを反応さ
せて得たグアニルチオ尿素の亜リン酸塩。 金属捕集剤Ｇ（本発明品） アリルチオ尿素１モルにリン酸１．５モルを反応させて
得たアリルチオ尿素のリン酸塩。 金属捕集剤Ｈ（本発明品） ジメチルチオ尿素１モルに次亜リン酸１．０モルを反応
させて得たジメチルチオ尿素の次亜リン酸塩。 金属処理剤Ｉ（従来品） リン酸。Metal treating agent A (product of the present invention) A phosphate of thiourea obtained by mixing 2.0 mol of phosphoric acid with 1 mol of thiourea. Metal treating agent B (product of the present invention) Phosphite of ethylenethiourea obtained by mixing 0.5 mol of phosphorous acid with 1 mol of ethylenethiourea. Metal treating agent C (product of the present invention) A hypophosphite of thiourea obtained by mixing 2.0 mol of hypophosphorous acid with 1 mol of thiourea. Metal treatment agent D (product of the present invention) A dithizone phosphate obtained by mixing 2.0 mol of phosphoric acid with 1 mol of dithizone. Metal treating agent E (the present invention) Phosphite of ethylenethiourea obtained by reacting 1.0 mol of phosphorous acid with 1 mol of ethylenethiourea. Metal Scavenger F (Product of the Invention) Phosphite of guanylthiourea obtained by reacting 1 mol of guanylthiourea with 2.0 mol of phosphorous acid. Metal collecting agent G (product of the present invention) Allylthiourea phosphate obtained by reacting 1.5 mol of phosphoric acid with 1 mol of allylthiourea. Metal Scavenger H (Product of the Present Invention) A hypophosphite of dimethylthiourea obtained by reacting 1 mol of dimethylthiourea with 1.0 mol of hypophosphorous acid. Metal treatment agent I (conventional product) phosphoric acid.
【００１７】実施例１〜８、比較例１ 水銀５ｍｇ／リットル、鉛１５ｍｇ／リットル、亜鉛３
ｍｇ／リットルを含む廃水１リットル当たりに対し、表
１に示す金属処理剤の水溶液（又は分散液）を、金属処
理剤の添加量が５ｍｇ（固形分換算）となるように添加
して、２０℃で３０分間攪拌した後、静置して沈殿した
フロックを分離除去した。フロック除去後の廃液中の残
存金属濃度を測定した結果を表１に示す。Examples 1 to 8, Comparative Example 1 Mercury 5 mg / l, lead 15 mg / l, zinc 3
An aqueous solution (or dispersion) of the metal treating agent shown in Table 1 was added to 1 liter of wastewater containing mg / liter so that the amount of the metal treating agent added was 5 mg (in terms of solid content). After stirring at 30 ° C. for 30 minutes, the resulting solution was allowed to stand, and the precipitated floc was separated and removed. Table 1 shows the results of measuring the residual metal concentration in the waste liquid after removing the flocs.
【００１８】[0018]
【表１】 [Table 1]
【００１９】実施例９〜１６、比較例２ 亜鉛７２０ｍｇ／ｋｇ、鉛１２７０ｍｇ／ｋｇ、水銀３
１６ｍｇ／ｋｇを含む煤塵１００ｇ当たりに対し、表２
に示す金属処理剤の水溶液（又は分散液）を、金属処理
剤の添加量が２ｇ（固形分換算）となるように添加し、
１５０〜１８０℃で３０分間混練した。各処理剤で処理
済の煤塵と未処理の煤塵各５０ｇを、ｐＨ＝４の酸性水
５００ｍｌ中で常温にて６時間浸とうして金属の溶出試
験を行った。酸性水中に溶出した金属の濃度を原子吸光
分析法によって測定した結果を表２に示す。Examples 9 to 16, Comparative Example 2 Zinc 720 mg / kg, lead 1270 mg / kg, mercury 3
Table 2 per 100g of dust containing 16mg / kg
An aqueous solution (or dispersion) of the metal treatment agent shown in (1) is added so that the addition amount of the metal treatment agent becomes 2 g (in terms of solid content),
The mixture was kneaded at 150 to 180 ° C. for 30 minutes. 50 g each of the dust treated with each treating agent and the untreated dust were immersed in 500 ml of acidic water having a pH of 4 at room temperature for 6 hours to perform a metal dissolution test. Table 2 shows the results obtained by measuring the concentration of the metal eluted in the acidic water by atomic absorption spectrometry.
【００２０】[0020]
【表２】 [Table 2]
【００２１】実施例１７〜２４、比較例３ 鉛３６０ｍｇ／ｋｇ、亜鉛９５８ｍｇ／ｋｇ、カドミウ
ム２４５ｍｇ／ｋｇを含有する鉱滓１００ｇ当たりに対
し、表３に示す金属処理剤の水溶液（又は分散液）を添
加量が３ｇ（固形分換算）となるように添加し、１００
〜１２０℃で１５分間混練した。各処理剤で処理済の鉱
滓と未処理の鉱滓各５０ｇを用い、実施例９〜１６と同
様にして酸性水中への金属溶出試験を行った。溶出した
金属の濃度を原子吸光分析法によって測定した結果を表
３に示す。Examples 17 to 24, Comparative Example 3 An aqueous solution (or dispersion) of the metal treating agent shown in Table 3 was used per 100 g of slag containing 360 mg / kg of lead, 958 mg / kg of zinc, and 245 mg / kg of cadmium. Add so that the addition amount becomes 3 g (solid content conversion), 100
Kneaded at ~ 120 ° C for 15 minutes. Using 50 g each of the slag that had been treated with each treatment agent and the untreated slag, a metal elution test into acidic water was performed in the same manner as in Examples 9 to 16. Table 3 shows the results of measuring the concentration of the eluted metal by atomic absorption spectrometry.
【００２２】[0022]
【表３】 [Table 3]
【００２３】実施例２５〜３２、比較例４ 鉛３５ｍｇ／ｋｇ、カドミウム７１４ｍｇ／ｋｇ、水銀
７ｍｇ／ｋｇを含有する土壌１００ｇ当たりに対し、表
４に示す金属処理剤の水溶液（又は分散液）を添加量が
１ｇ（固形分換算）となるように添加し、８０〜１２０
℃で３０分間混練した後、１００〜１２０℃で４０分間
養生した。各処理剤で処理済の土壌と未処理の土壌各５
０ｇを用い、実施例９〜１６と同様にして金属溶出試験
を行った。溶出した金属の濃度を原子吸光分析法によっ
て測定した結果を表４に示す。Examples 25 to 32, Comparative Example 4 An aqueous solution (or dispersion) of the metal treating agent shown in Table 4 was applied to 100 g of soil containing 35 mg / kg of lead, 714 mg / kg of cadmium, and 7 mg / kg of mercury. It is added so that the addition amount becomes 1 g (solid content conversion),
After kneading at 30 ° C for 30 minutes, the mixture was cured at 100 to 120 ° C for 40 minutes. 5 soils each treated and 5 untreated soils
Using 0 g, a metal dissolution test was performed in the same manner as in Examples 9 to 16. Table 4 shows the results obtained by measuring the concentration of the eluted metal by atomic absorption spectrometry.
【００２４】[0024]
【表４】 [Table 4]
【００２５】実施例３３〜４０、比較例５ 水銀１ｍｇ／Ｎｍ3 、鉛３ｍｇ／Ｎｍ3 、ダスト３ｇ／
Ｎｍ3 を含むゴミ焼却場の廃ガス（１４０００Ｎｍ3 ／
時間、２８０℃）に、表５に示す金属捕集剤の水溶液
を、金属捕集剤が固型分として２５０ｍｇ／Ｎｍ3 の割
合で供給されるように煙道中に噴霧し、廃ガス中の水銀
と金属捕集剤とを反応させた後、バグフィルターにて集
塵した。バグフィルター通過後の廃ガス中の水銀、鉛の
濃度を測定した結果を表５に示す。また、バグフィルタ
ーにて集塵された煤塵５０ｇを用い、実施例９〜１６と
同様に金属溶出試験を行った。結果を表５に示す。Examples 33 to 40, Comparative Example 5 Mercury 1 mg / Nm 3 , lead 3 mg / Nm 3 , dust 3 g / Nm 3
Waste gas from waste incineration plants containing Nm 3 (14000 Nm 3 /
At 280 ° C.), an aqueous solution of the metal trapping agent shown in Table 5 was sprayed into the flue such that the metal trapping agent was supplied as a solid component at a rate of 250 mg / Nm 3 , and the waste gas was discharged. After reacting mercury with the metal collector, dust was collected with a bag filter. Table 5 shows the results of measuring the concentrations of mercury and lead in the waste gas after passing through the bag filter. In addition, a metal elution test was performed in the same manner as in Examples 9 to 16, using 50 g of dust collected by a bag filter. Table 5 shows the results.
【００２６】[0026]
【表５】 [Table 5]
【００２７】[0027]
【発明の効果】以上説明したように本発明の金属処理剤
は、従来のジチオカルバミン酸型金属処理剤と同様に水
銀やカドミウムに対して優れた捕集力を発揮するととも
に、鉛や亜鉛に対しても優れた捕集力を有するため、本
発明の処理剤によれば、鉛や亜鉛を含む廃水、固体状廃
棄物、廃ガスを効果的に処理することができる。また本
発明の金属処理剤は、酸性条件下においても金属に対し
て優れた結合力を有するため、酸性物質を含む廃水のよ
うに低ｐＨ条件下でも、確実に廃水中の金属処理が行
え、また本発明処理剤で処理した固体状廃棄物は、酸性
雨等に晒された場合でも、固体状廃棄物中から金属が再
溶出する虞れがない等の効果を有する。更に、従来の金
属処理剤のなかには、酸性条件下で用いると有毒ガスを
発生するものもあるが、本発明の金属処理剤は酸性条件
下で用いても有毒ガスを発生する虞れがなく、安全に処
理を行うことができる等の種々の効果を有する。As described above, the metal treating agent of the present invention exhibits an excellent collecting power for mercury and cadmium as well as a conventional dithiocarbamic acid type metal treating agent, and also has an excellent ability to remove lead and zinc. However, according to the treatment agent of the present invention, wastewater containing lead and zinc, solid waste, and waste gas can be effectively treated. In addition, the metal treatment agent of the present invention has an excellent binding force to metals even under acidic conditions, so even under low pH conditions such as wastewater containing acidic substances, metal treatment in wastewater can be performed reliably, Further, the solid waste treated with the treating agent of the present invention has an effect such that there is no fear that the metal is re-eluted from the solid waste even when exposed to acid rain or the like. Furthermore, some of the conventional metal treating agents generate toxic gases when used under acidic conditions, but the metal treating agents of the present invention have no risk of generating toxic gases even when used under acidic conditions, It has various effects such as safe processing.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ テーマコート゛(参考） Ｃ０２Ｆ 1/62 Ｂ０１Ｄ 53/34 １３６Ｚ Ｂ０９Ｂ 3/00 ３０４Ｇ (72)発明者 清水 剛 東京都葛飾区堀切４丁目66番１号 ミヨシ 油脂株式会社内 (72)発明者 竹内 寿 東京都葛飾区堀切４丁目66番１号 ミヨシ 油脂株式会社内 (72)発明者 川島 正毅 東京都葛飾区堀切４丁目66番１号 ミヨシ 油脂株式会社内 (72)発明者 守屋 雅文 東京都葛飾区堀切４丁目66番１号 ミヨシ 油脂株式会社内 Ｆターム(参考） 2E191 BA02 BB01 BB02 BC05 BD01 4D002 AA28 AC02 AC04 BA04 DA61 DA70 EA05 4D004 AA28 AA36 AA37 AA41 AA43 AB03 AC04 CA15 CC06 CC15 4D038 AA08 AB63 AB65 AB68 AB69 AB71 AB73 AB74 BB06 BB20──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification symbol FI Theme coat ゛ (Reference) C02F 1/62 B01D 53/34 136Z B09B 3/00 304G (72) Inventor Tsuyoshi Shimizu 4 Horikiri, Katsushika-ku, Tokyo No. 66-1, Miyoshi Oil & Fat Co., Ltd. (72) Inventor, Hisashi Takeuchi 4-66-1, Horikiri, Katsushika-ku, Tokyo Inside Miyoshi Oil & Fat Co., Ltd. (72) Inventor, Masatake Kawashima 4-66-1, Horikiri, Katsushika-ku, Tokyo No. Miyoshi Oil & Fat Co., Ltd. (72) Inventor Masafumi Moriya 4-66-1, Horikiri, Katsushika-ku, Tokyo F-term in Miyoshi Oil & Fat Co., Ltd. (Reference) 2E191 BA02 BB01 BB02 BC05 BD01 4D002 AA28 AC02 AC04 BA04 DA61 DA70 EA05 4D004 AA28 AA36 AA37 AA41 AA43 AB03 AC04 CA15 CC06 CC15 4D038 AA08 AB63 AB65 AB68 AB69 AB71 AB73 AB74 BB06 BB20
Claims (1)
りなることを特徴とする金属処理剤。1. A metal treating agent comprising a salt of a phosphoric acid of a thiocarbonyl compound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10324573A JP2000136373A (en) | 1998-08-27 | 1998-10-29 | Metal-treating agent |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25756198 | 1998-08-27 | ||
| JP10-257561 | 1998-08-27 | ||
| JP10324573A JP2000136373A (en) | 1998-08-27 | 1998-10-29 | Metal-treating agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000136373A true JP2000136373A (en) | 2000-05-16 |
Family
ID=26543265
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10324573A Pending JP2000136373A (en) | 1998-08-27 | 1998-10-29 | Metal-treating agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2000136373A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006061907A (en) * | 2005-09-08 | 2006-03-09 | Hitachi Zosen Corp | Formation suppressant and formation suppressing method of chlorinated aromatic compound |
-
1998
- 1998-10-29 JP JP10324573A patent/JP2000136373A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006061907A (en) * | 2005-09-08 | 2006-03-09 | Hitachi Zosen Corp | Formation suppressant and formation suppressing method of chlorinated aromatic compound |
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