JPS605280A - Treatment of waste water containing lead ion - Google Patents
Treatment of waste water containing lead ionInfo
- Publication number
- JPS605280A JPS605280A JP58110100A JP11010083A JPS605280A JP S605280 A JPS605280 A JP S605280A JP 58110100 A JP58110100 A JP 58110100A JP 11010083 A JP11010083 A JP 11010083A JP S605280 A JPS605280 A JP S605280A
- Authority
- JP
- Japan
- Prior art keywords
- cation exchange
- lead
- waste water
- exchange resin
- lead ion
- 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
- 239000002351 wastewater Substances 0.000 title claims abstract description 34
- RVPVRDXYQKGNMQ-UHFFFAOYSA-N lead(2+) Chemical compound [Pb+2] RVPVRDXYQKGNMQ-UHFFFAOYSA-N 0.000 title abstract description 11
- 239000003729 cation exchange resin Substances 0.000 claims abstract description 36
- 150000002500 ions Chemical class 0.000 claims abstract description 36
- NWUYHJFMYQTDRP-UHFFFAOYSA-N 1,2-bis(ethenyl)benzene;1-ethenyl-2-ethylbenzene;styrene Chemical compound C=CC1=CC=CC=C1.CCC1=CC=CC=C1C=C.C=CC1=CC=CC=C1C=C NWUYHJFMYQTDRP-UHFFFAOYSA-N 0.000 claims abstract description 35
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 11
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000011347 resin Substances 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 10
- 150000001768 cations Chemical class 0.000 claims abstract description 5
- 239000007864 aqueous solution Substances 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 20
- 230000002378 acidificating effect Effects 0.000 abstract description 13
- 239000007788 liquid Substances 0.000 abstract description 11
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 abstract description 8
- 239000003513 alkali Substances 0.000 abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 abstract description 5
- 238000005342 ion exchange Methods 0.000 abstract description 5
- 235000010344 sodium nitrate Nutrition 0.000 abstract description 4
- 239000004317 sodium nitrate Substances 0.000 abstract description 3
- 238000001914 filtration Methods 0.000 abstract 1
- 238000003795 desorption Methods 0.000 description 16
- 238000001556 precipitation Methods 0.000 description 7
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 239000004065 semiconductor Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- 150000003839 salts Chemical group 0.000 description 4
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- HWSZZLVAJGOAAY-UHFFFAOYSA-L lead(II) chloride Chemical compound Cl[Pb]Cl HWSZZLVAJGOAAY-UHFFFAOYSA-L 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- 239000011734 sodium Substances 0.000 description 3
- 239000011780 sodium chloride Substances 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000011001 backwashing Methods 0.000 description 2
- 229940023913 cation exchange resins Drugs 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 1
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 229920001429 chelating resin Polymers 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000003456 ion exchange resin Substances 0.000 description 1
- 229920003303 ion-exchange polymer Polymers 0.000 description 1
- 150000002611 lead compounds Chemical class 0.000 description 1
- 229910021514 lead(II) hydroxide Inorganic materials 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000011121 sodium hydroxide Nutrition 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 210000004233 talus Anatomy 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は鉛イオンを含有する廃水をカチオン交換樹脂で
処理する方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for treating wastewater containing lead ions with a cation exchange resin.
従来から鉛イオンを含有する廃水を処理するにあたりヌ
当該廃水に石灰・ソーダ灰ｙか性ソーダなどのアルカリ
を添加し・廃水中の鉛イオンを水酸化鉛とし・これを固
液分離する・いわゆる沈殿処理をすることが普通に行な
われている。しかしながらこの方法は反応させるｐＨが
１１以上となると水酸化錯イオンが生成して鉛化合物の
再溶解が起こるので・ｐＨの制御を厳密にせねばならず
・また廃水中の鉛イオン濃度が変化しやすい場合は・当
該濃度に追随してアルカリの添加量も変化させねばなら
ず・運転管理が比較的煩雑であるという欠点を有してい
る。寸だ鉛イオン濃度が比較的薄い場合などは特に十記
沈殿処理が適用しにくいという欠点もある。Conventionally, when treating wastewater containing lead ions, alkali such as lime or soda ash or caustic soda is added to the wastewater, the lead ions in the wastewater are converted to lead hydroxide, and this is separated into solid-liquid. Precipitation treatment is commonly used. However, in this method, when the pH of the reaction exceeds 11, hydroxide complex ions are generated and the lead compound is redissolved, so the pH must be strictly controlled, and the lead ion concentration in the wastewater is likely to change. In this case, the amount of alkali added must be changed according to the concentration, and operation management is relatively complicated. Another disadvantage is that it is difficult to apply the precipitation treatment especially when the lead ion concentration is relatively low.
一方鉛イオンはカチオン交換樹脂に吸着するので・上記
廃水をカチオン交換樹脂層に通水することにより廃水中
の鉛イオンを除去することができる。しかしながら当該
カチオン交換樹脂に吸着した鉛イオンを脱着する際に・
従来では以下のようが障害が生じていた。すなわち鉛イ
オンを吸着したカチオン交換樹脂に通常の脱着剤・たと
えば塩化ナトリウム水溶液や塩酸を通液すると・脱着に
より液中に移行した塩化鉛がカチオン交換樹脂層中で直
ちに析出し・脱着剤の通液が困難となったり・あるいは
カチオン交換樹脂を汚染し・さらには次回の通水中に当
該析出した塩化鉛が徐々に溶解して処理水中に鉛イオン
が漏出するなどの障害が生じていた。このように従来で
はカチオン交換樹脂に吸着した鉛イオンを効果的に脱着
することが困難であったので・鉛イオンを含有する廃水
の処理にカチオン交換樹脂が用いられなかったが・本発
明者等はこの点に鑑みて・種々の検討を行なった結果・
脱着剤として硝酸塩の水溶液を用いることにより・前述
した脱着の際の障害が全て解決できることを知見した。On the other hand, since lead ions are adsorbed on the cation exchange resin, the lead ions in the waste water can be removed by passing the waste water through the cation exchange resin layer. However, when desorbing lead ions adsorbed on the cation exchange resin,
Previously, the following problems occurred. In other words, when a normal desorbent such as an aqueous sodium chloride solution or hydrochloric acid is passed through a cation exchange resin that has adsorbed lead ions, the lead chloride transferred into the liquid due to desorption will immediately precipitate in the cation exchange resin layer and the desorbent will pass through. Problems such as the liquid becoming difficult to clean, contaminating the cation exchange resin, and furthermore, the precipitated lead chloride gradually dissolving during the next water flow, causing lead ions to leak into the treated water. In this way, in the past, it was difficult to effectively desorb lead ions adsorbed on cation exchange resins, so cation exchange resins were not used to treat wastewater containing lead ions.The present inventors et al. In view of this point, as a result of various studies,
It has been found that by using an aqueous solution of nitrate as a desorbent, all of the above-mentioned problems during desorption can be overcome.
本発明は上記知見に基づくものであり・鉛イオンを含有
する廃水をカチオン交換樹脂に通水して該廃水中の鉛イ
オンをカチオン交換樹脂に吸着させ・ついで鉛イオンを
吸着した該カチオン交換樹脂に硝酸塩の水溶液を通液し
て該カチオン交換樹脂から鉛イオンを脱着することを特
徴とする鉛イオンを含有する廃水の処理方法に関するも
のである。The present invention is based on the above findings. Waste water containing lead ions is passed through a cation exchange resin, and the lead ions in the waste water are adsorbed onto the cation exchange resin.Then, the cation exchange resin adsorbs the lead ions. The present invention relates to a method for treating wastewater containing lead ions, characterized in that lead ions are desorbed from the cation exchange resin by passing an aqueous solution of nitrate through the resin.
以下に本発明を図面を参照して詳細に説明する。The present invention will be explained in detail below with reference to the drawings.
図面は本発明を半導体製造工程から発生するハンダディ
ップ廃水の処理に適用した場合のフローの説明図である
。The drawing is an explanatory diagram of a flow when the present invention is applied to treatment of solder dip wastewater generated from a semiconductor manufacturing process.
半導体製造工程において基板に各種の半導体を固定し・
これらを結線するためにハンダづけが行なわれているが
、最終製品を得る際にこれらの基板を薄い酸で洗浄する
ため鉛が約５ｍｇ７を前後を含有する半導体ハンダディ
ップ廃水が発生する。このような鉛イオン含有計が少な
い廃水においては前述したような沈殿処理法では生成す
るフロックの量が少なすぎ・その適用が困難であるが・
後述するようにカチオン交換樹脂を用いると良好に処理
することができる。In the semiconductor manufacturing process, various semiconductors are fixed to the substrate.
Soldering is performed to connect these wires, but when the final product is obtained, these boards are cleaned with dilute acid, which generates semiconductor solder dip wastewater containing around 5 mg of lead. For such wastewater with low lead ion content, the precipitation treatment method described above produces too few flocs and is difficult to apply.
As described below, the treatment can be performed satisfactorily by using a cation exchange resin.
すなわち廃水槽ｌの鉛イオンを含む廃水２をポンプ３を
用いて・塩形たとえばＮａ形の強酸性カチオン交換樹脂
４が充填されているイオン交換塔５に通水し、廃水２中
の鉛イオンおよび共存する多価カチオンを強酸性カチオ
ン交換樹脂４に吸着させる。なお廃水２に懸濁物が含寸
れている場合は適当な濾過機を用いてあらかじめ懸濁物
を除去するとよい。このような操作により鉛イオンがｏ
、 ｌ ｍｇ７を以下に減少された処理水６が得られ
るので・当該処理水６をそのまま放流することができる
。That is, the waste water 2 containing lead ions in the waste water tank 1 is passed through the ion exchange tower 5 filled with a strongly acidic cation exchange resin 4 in the salt form, for example, the Na form, using the pump 3, and the lead ions in the waste water 2 are removed. and the coexisting polyvalent cations are adsorbed onto the strongly acidic cation exchange resin 4. If the wastewater 2 contains suspended matter, it is advisable to remove the suspended matter in advance using a suitable filter. This operation removes lead ions.
Since the treated water 6 is obtained in which the amount of the treated water 6 is reduced to less than 1 mg7, the treated water 6 can be discharged as it is.
なお強酸性カチオン交換樹脂４の樹脂層高としては通常
１・０００ｍｍ前後とし・すくなくとも６００ｍｍより
高くするとよい。また廃水２の通水流量はＬＶ２０ｍ／
Ｈ前後が適当であるが・これ以下の流量でもまたこれ以
上の流量でもさしつかえない。Note that the resin layer height of the strongly acidic cation exchange resin 4 is usually around 1.000 mm, and is preferably higher than at least 600 mm. In addition, the water flow rate of wastewater 2 is LV20m/
A flow rate of around H is appropriate, but a flow rate lower or higher than this is also acceptable.
このような通水を続行すると強酸性カチオン交換樹脂４
が鉛イオンなどの多価カチオンによって貫流点に達し・
処理水６中に鉛イオンがリークしはじめてくる。したが
って通水を中断し。If this water flow continues, the strongly acidic cation exchange resin 4
reaches the flow-through point due to polyvalent cations such as lead ions.
Lead ions begin to leak into the treated water 6. Therefore, water flow was interrupted.
以下の脱着操作を行なう。Perform the following attachment/detachment operations.
す彦わち常法により強酸性カチオン交換樹脂４を逆洗し
て当該樹脂層中の懸濁物を除くとともに樹脂層をほぐし
・沈整した後脱着剤である硝酸塩水溶液７を通液する。After backwashing the strongly acidic cation exchange resin 4 to remove suspended matter in the resin layer and loosening and settling the resin layer, a nitrate aqueous solution 7 as a desorbent is passed through the resin layer using a conventional method.
本発明に用いる硝酸塩としては硝酸す） ＩＪウム・硝
酸カリウム！硝酸アンモニウムなどが用いられるが・通
常は硝酸ナトリウムの５条（距骨％）水溶液を用いるこ
とが好ましい３゜このような硝酸塩水溶液７を強酸性カ
チオン交換樹脂４に通液すると・該カチオン交換樹脂４
に吸着されていた鉛イオンは脱着され、該カチオン交換
樹脂４のイオン形を次の通水に適したＮａ形とするとと
もにｔ鉛イオンを多−計に含有する脱着液８が得られる
。当該脱着液８と押出し水および洗浄廃水を脱着液槽９
に受け、前述した沈殿処理を行なう。すなわち脱着液に
アルカリを添加して鉛を水酸化物となし・これを濾別し
て水酸化物のケーキを得る。なお本沈殿処理においては
鉛イオンが濃縮された脱着液が対象となり・かつバッチ
処理することができるので当該処理が比較的容易に実施
できる。The nitrate used in the present invention is nitric acid) potassium nitrate! Although ammonium nitrate etc. are used, it is usually preferable to use a 5-filament (talus %) aqueous solution of sodium nitrate3. When such a nitrate aqueous solution 7 is passed through the strongly acidic cation exchange resin 4, the cation exchange resin 4
The lead ions adsorbed on the cation exchange resin 4 are desorbed, and the ion exchange resin 4 is changed into the Na type suitable for the next water passage, and a desorption liquid 8 containing a large amount of lead ions is obtained. The desorption liquid 8, extrusion water and washing waste water are transferred to a desorption liquid tank 9.
and undergo the precipitation treatment described above. That is, an alkali is added to the desorption solution to convert lead into hydroxide, which is filtered to obtain a hydroxide cake. In this precipitation process, the desorption liquid in which lead ions are concentrated is targeted, and since batch processing can be performed, the process can be carried out relatively easily.
また本発明の脱着操作においては強酸性カチオン交換樹
脂中に鉛塩が析出することなく良好に脱着することがで
きるが・これは脱着剤として硝酸塩の水溶液を用いるこ
とによる効果であり、従来から用いられているたとえば
塩化ナトリウムの水溶液・塩酸では本発明のような効果
は全く望むことができない。しだがって脱着後の通水に
おいて・従来見られていたような析出鉛が徐々に溶解す
ることによる鉛イオンの漏出が全く生じることがない。In addition, in the desorption operation of the present invention, lead salts can be successfully desorbed into the strongly acidic cation exchange resin without precipitation. This is an effect of using an aqueous solution of nitrate as a desorbent, and is not used conventionally. For example, with an aqueous solution of sodium chloride or hydrochloric acid, the effects of the present invention cannot be expected at all. Therefore, during water passage after desorption, leakage of lead ions due to gradual dissolution of precipitated lead, which has been observed in the past, does not occur at all.
なお脱着剤としては硝酸塩の他に硝酸を用いても鉛塩の
析出を防止して脱着するという目的は達成できるが・硝
酸の場合はイオン交換塔その他の装置を耐酸性にせねば
ならず設備費が増加し・また処理水が酸性となるので放
流するにあたり中和する必要があり・さらに脱着液も強
酸性となるので・脱着液を沈殿処理して鉛を水酸化物と
して分離する際に多量のアルカリを必要とするなど種々
の欠点を有しており好ましくない。Note that the purpose of preventing and desorbing lead salts can be achieved by using nitric acid instead of nitrate as a desorbent; however, in the case of nitric acid, the ion exchange tower and other equipment must be made acid-resistant, which increases equipment costs.・Also, the treated water becomes acidic, so it needs to be neutralized before being discharged. Furthermore, the desorption solution is also strongly acidic. ・When the desorption solution is precipitated to separate lead as hydroxide, a large amount It is not preferred because it has various drawbacks such as requiring alkali.
す」二説明したごとく本発明はイオン交換塔に単に廃水
を通水するのみで放流可能な処理水が得られ・また廃水
中の鉛イオンの量が変動しても全く問題なく処理するこ
とができるので運転管理が容易であり・かつ処理設備も
安価であり設置面積も小さい。さらにカチオン交換樹脂
に吸着した鉛イオンを脱着する際において・カチオン交
換樹脂層に鉛塩が全く析出することなく効果的に脱着す
ることができる。As explained above, the present invention can obtain treated water that can be discharged by simply passing wastewater through an ion exchange tower, and can be treated without any problem even if the amount of lead ions in the wastewater fluctuates. This makes operation management easy, and the processing equipment is inexpensive and requires a small installation area. Furthermore, when desorbing lead ions adsorbed on the cation exchange resin, lead salts can be effectively desorbed without any precipitation on the cation exchange resin layer.
以下に本発明の効果を明確とするために実施例を説明す
る。Examples will be described below to clarify the effects of the present invention.
実施例
内径３２．５ｍｍ＋長さｌ＋０００ｍｍのアクリル製の
カラムにＮａ形の強酸性カチオン交換樹脂アンバーライ
ト（登録商標） ＩＲ−１２０Ｂを５００ｍ１充填し１
当該カラムにカルシウムイオン！マグネシウムイオンな
どの多価カチオン２０■ａｓ Ｃａ、ＧＯ３／ｌと鉛イ
オン５■ａＳＰｂ／ｌを含む半導体製造工程から発生す
る一ノ・ンダデイツプ廃水を２５１７Ｈで通水した。そ
の結果鉛イオンｏ、１ｍｇ／ＩＪソ下の処理水が得られ
た。処理量が約１．１ｍ：’に達した点で貫流点となっ
たので通水を止め・以下の脱着を行なった。Example: An acrylic column with an inner diameter of 32.5 mm + length l + 000 mm was filled with 500 ml of Na-type strongly acidic cation exchange resin Amberlite (registered trademark) IR-120B.
Calcium ions in the column! Ichino-Daip wastewater generated from a semiconductor manufacturing process containing polyvalent cations such as magnesium ions (20 as Ca, GO3/l) and lead ions (5 as SPb/l) was passed through at 2517H. As a result, treated water containing 1 mg/IJ of lead ions was obtained. When the throughput reached approximately 1.1 m:', the flow reached the point where water flow was stopped and the following desorption was performed.
すなわち常法により逆洗・沈整を行ガつた後・１５０７
の硝酸ナトリウム（再生レベル３００Ｓ’ＮａＮＯ３／
ｌＲに相当する）を用いて５チ（重量係）の硝酸ナトリ
ウム水溶液を調整し・当該水溶液をＳＶ４で通液し・常
法により押出水洗を行なった。In other words, after backwashing and settling by conventional methods, 1507
of sodium nitrate (regeneration level 300S'NaNO3/
A sodium nitrate aqueous solution of 5 cm (by weight) was prepared using a 1R (corresponding to 1R), the aqueous solution was passed through an SV4, and extrusion was washed with water using a conventional method.
またその脱着液の鉛を分析したところカチオン交換樹脂
に吸着した鉛イオンのほぼ１００係が脱着されているこ
とが確認された。Furthermore, when the lead content of the desorption solution was analyzed, it was confirmed that approximately 100% of the lead ions adsorbed on the cation exchange resin were desorbed.
なお比較のために脱着剤として５チ（垂部、チ）の塩化
ナトリウム水溶液を用いたところ・通液中にカチオン交
換樹脂層に塩化鉛が析出し脱着が良好に行なわれなかっ
た。For comparison, when a 5 liter aqueous solution of sodium chloride was used as a desorbent, lead chloride precipitated on the cation exchange resin layer during the passage of the solution, and desorption was not carried out well.
図面は本発明の実施態様の一例のフローの説明図であり
・１は廃水槽・２は廃水・３はポンプ・４は強酸性カチ
オン交換樹脂・５はイオン交換塔・６は処理水・７は硝
酸塩水溶液・８は脱着液、９は脱着液槽を示す。The drawing is an explanatory diagram of the flow of an example of an embodiment of the present invention. 1 is a waste water tank, 2 is waste water, 3 is a pump, 4 is a strong acid cation exchange resin, 5 is an ion exchange tower, 6 is treated water, and 7 indicates a nitrate aqueous solution, 8 indicates a desorption liquid, and 9 indicates a desorption liquid tank.
Claims (1)
該廃水中の鉛イオンをカチオン交換樹脂に吸着させ・つ
いで鉛イオンを吸着したカチオン交換樹脂に硝酸塩の水
溶液を通液して該カチオン交換樹脂から鉛イオンを脱着
することを特徴とする鉛イオンを含有する廃水の処理方
法Wastewater containing lead ions is passed through a cation exchange resin to adsorb the lead ions in the wastewater onto the cation exchange resin, and then an aqueous solution of nitrate is passed through the cation exchange resin that has adsorbed lead ions to exchange the cations. A method for treating wastewater containing lead ions, characterized by desorbing lead ions from a resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58110100A JPS605280A (en) | 1983-06-21 | 1983-06-21 | Treatment of waste water containing lead ion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58110100A JPS605280A (en) | 1983-06-21 | 1983-06-21 | Treatment of waste water containing lead ion |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS605280A true JPS605280A (en) | 1985-01-11 |
| JPH0368756B2 JPH0368756B2 (en) | 1991-10-29 |
Family
ID=14527032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58110100A Granted JPS605280A (en) | 1983-06-21 | 1983-06-21 | Treatment of waste water containing lead ion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS605280A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116607010A (en) * | 2023-07-19 | 2023-08-18 | 长沙华时捷环保科技发展股份有限公司 | Method for removing and recovering lead from lead-containing solution |
-
1983
- 1983-06-21 JP JP58110100A patent/JPS605280A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116607010A (en) * | 2023-07-19 | 2023-08-18 | 长沙华时捷环保科技发展股份有限公司 | Method for removing and recovering lead from lead-containing solution |
| CN116607010B (en) * | 2023-07-19 | 2023-10-17 | 长沙华时捷环保科技发展股份有限公司 | Method for removing and recovering lead from lead-containing solution |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0368756B2 (en) | 1991-10-29 |
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