JPS5640481A - Treating method for exhaust water - Google Patents

Treating method for exhaust water

Info

Publication number
JPS5640481A
JPS5640481A JP11672879A JP11672879A JPS5640481A JP S5640481 A JPS5640481 A JP S5640481A JP 11672879 A JP11672879 A JP 11672879A JP 11672879 A JP11672879 A JP 11672879A JP S5640481 A JPS5640481 A JP S5640481A
Authority
JP
Japan
Prior art keywords
chromium
exhaust water
solution
resin
eluted
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
Application number
JP11672879A
Other languages
Japanese (ja)
Inventor
Masanori Nagata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KUMAMOTOKEN
Kumamoto Prefecture
Original Assignee
KUMAMOTOKEN
Kumamoto Prefecture
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by KUMAMOTOKEN, Kumamoto Prefecture filed Critical KUMAMOTOKEN
Priority to JP11672879A priority Critical patent/JPS5640481A/en
Publication of JPS5640481A publication Critical patent/JPS5640481A/en
Pending legal-status Critical Current

Links

Landscapes

  • Treatment Of Water By Ion Exchange (AREA)
  • Removal Of Specific Substances (AREA)

Abstract

PURPOSE: To recover useful components and prevent harmful substances from being outflowed externally by a method wherein chromium in an exhaust water is removed by adsorption due to an anion exchange resin and, thereafter, this resin is treated by an alkali to elute chromium and to be regenerated and the eluted liquid is recirculated and used in a wood preservative agent.
CONSTITUTION: The exhaust water of copper, chromium, arsenic cpd. type wood preservative agent is adjusted to a pH 4.5 or more and the copper and arsenic are separated as hydroxides. Subsequently, the exhaust water containing only chromium is passed through towers 3, 4 packed with a strong basic anion exchange resin to adsorb chromium. If the exchange capacity is lowered, this resin is regenerated in a mixed solution 6 of sodium hydroxide and sodium chloride and the eluted solution is transferred to a tank 8 and neutralized by a mineral acid 7 such as hydrochloric acid or the like and, after the concn. of sodium chloride in the eluted solution is reduced to 1.0% or less, added to an aqueous wood preservative agent solution and reused. Thus, while harmful components are prevented from being outflowed, said eluted solution is recirculated and used.
COPYRIGHT: (C)1981,JPO&Japio
JP11672879A 1979-09-13 1979-09-13 Treating method for exhaust water Pending JPS5640481A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11672879A JPS5640481A (en) 1979-09-13 1979-09-13 Treating method for exhaust water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11672879A JPS5640481A (en) 1979-09-13 1979-09-13 Treating method for exhaust water

Publications (1)

Publication Number Publication Date
JPS5640481A true JPS5640481A (en) 1981-04-16

Family

ID=14694320

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11672879A Pending JPS5640481A (en) 1979-09-13 1979-09-13 Treating method for exhaust water

Country Status (1)

Country Link
JP (1) JPS5640481A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102285704A (en) * 2010-07-30 2011-12-21 深圳东江华瑞科技有限公司 Ion exchange resin arsenic removal method for acidic etching liquid, resin regeneration method and treatment system thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102285704A (en) * 2010-07-30 2011-12-21 深圳东江华瑞科技有限公司 Ion exchange resin arsenic removal method for acidic etching liquid, resin regeneration method and treatment system thereof

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