CN105712594A - Method of recovering heavy metals from heavy metal wastewater and sludge - Google Patents
Method of recovering heavy metals from heavy metal wastewater and sludge Download PDFInfo
- Publication number
- CN105712594A CN105712594A CN201410736164.0A CN201410736164A CN105712594A CN 105712594 A CN105712594 A CN 105712594A CN 201410736164 A CN201410736164 A CN 201410736164A CN 105712594 A CN105712594 A CN 105712594A
- Authority
- CN
- China
- Prior art keywords
- sludge
- heavy metal
- mud
- electrolyte
- distilled water
- 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
- Electrolytic Production Of Metals (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a method of recovering heavy metals from heavy metal wastewater and sludge. The method comprises the following steps: (1) preprocessing sludge: preprocessing sludge by a sulfuric acid solution in a magnetic stirrer for 0.5 to 1 hour under a rotation speed of 200 to 300 r/min; (2) filling the sludge into an electrolytic bath: filling the sludge preprocessed in the step (1) into an electrolytic bath layer by layer, evenly pressing the sludge, injecting distilled water into the cathode electrolytic chamber and the anode electrolytic chamber, allowing the system to stand still for 12 to 36 hours to achieve a penetration balance, replacing the distilled water by electrolytes, wherein the cathode electrolyte is a HNO3 solution with a pH of 1 to 3 and the cathode electrolyte is critic acid with a pH of 1 to 3; (3) electrifying: performing electrifying for 5 to 15 days under a potential gradient of 0.5 to 2 V/cm, and controlling the pH value of the cathode electrolyte in a range of 2 to 7. The method is used to treat heavy metal wastewater and sludge, can enrich and recover heavy metal ions in electrolyte, and thus effectively removes heavy metals from heavy metal wastewater and sludge.
Description
Technical field
The present invention relates to a kind of method reclaiming heavy metal from heavy metal wastewater thereby mud, be the new technique adopting electric repair method to reclaim Heavy Metals in Sludge, belong to secondary resource and reclaim and field of environment engineering technology.
Background technology
Mud is the important secondary resource produced in human being's production and life.Along with the fast development of metallurgy, chemical industry, mining industry, electronics industry and foundry industry, sanitary sewage, industrial wastewater discharge capacity increasing, water process the heavy metal pollution sludge problem produced and be on the rise.If environment is caused the loss of serious heavy metal sewage sludge and precious resource by the mishandling meeting of this mud, cause environment for human survival deterioration, cause that all kinds of contamination accident takes place frequently, the benign cycle of serious harm ecosystem and the existence of the mankind are healthy, therefore scientific and reasonable lignin-sludge, reducing the pollution to environment, the recycling simultaneously realizing mud is highly important.At present, the method removing heavy metal has Chemical Leaching, Bioleaching, phytoremediation, electro reclamation etc..Owing to Chemical Leaching easily causes secondary pollution, Bioleaching is affected by environment relatively big, and the phytoremediation cycle is long, but the characteristic of electro reclamation cycle short contaminated medium and pH value impact do not reach greatly and all desirable treatment effect.
Summary of the invention
It is an object of the invention to provide a kind of method utilizing electric repair method to reclaim heavy metal from heavy metal wastewater thereby mud, make the heavy metal in heavy metal wastewater thereby mud effectively be removed.
For achieving the above object, the present invention is by the following technical solutions:
A kind of method reclaiming heavy metal from heavy metal wastewater thereby mud, comprises the following steps:
(1) sludge pretreatment: mud is carried out pretreatment with sulfuric acid solution, preprocess method is to be use magnetic stirrer 0.5-1h under 200-300r/min at rotating speed；
(2) electrolysis bath is loaded: mud layering good for pretreatment in (1) is loaded electrolysis bath, press even, distilled water is injected in catholyte chamber and anode electrolysis room, it is the HNO of 1-3 that distilled water is replaced by electrolyte, catholyte and anolyte respectively pH value by standing 12-36h to Osmotic balance3Solution and pH value are the citric acid of 1-3；
(3) energising: being energized 5-15 days under the potential gradient of 0.5-2V/cm, catholyte pH value controls at 2-7.
In the present invention, the concentration of described sulfuric acid solution is 0.5-2mol/L, and adopting the pretreated moisture percentage in sewage sludge of this sulfuric acid solution is 70%-85%.
In described step (2), in the electrolysis bath of cathode side, loading activated carbon.Heavy metal, under the effect of electronic-absorption United Technologies, in conjunction with electrolyte ph control, separates from mud, enters in electrolyte.
After experiment terminates, collect electrolyte, reclaim valuable metal therein, as general offal treatment after sludge heavy-metal is up to standard.
It is an advantage of the current invention that:
(1) present invention adopts electric repairing technique, make the heavy metal in the mud produced in wastewater treatment process be removed, while making mud environmental pollution alleviate, make the heavy metal in mud be separated and recovered, serve i.e. Environment control, the again good result of Resource recovery.(2) present invention is simple to operate, and processing cost is low.(3) present invention does not produce secondary pollution in implementation process.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described, but embodiments of the present invention are not limited to this.
Embodiment 1
(1) sludge pretreatment: take smelting wastewater mud sample 500g, in this smelting wastewater mud, major metal content is Cu5.01%, Ni0.61%, Pb0.68%, Cr0.028%, Ca8.56%.
(2) with the sulfur acid pretreatment mud that concentration is 1mol/L, preprocess method is to be that to use magnetic stirrer 0.5h, the moisture content of pretreating sludge under 250r/min be 80% at rotating speed, and original ph is 5.95.
(3) electrolysis bath is loaded: mud layering good for pretreatment in (1) being put in the rectangle box in the middle of electro reclamation electrolysis bath, press even, the cathode side of electrolysis bath loads activated carbon.
(4) distilled water is injected in negative electrode and anode electrode room, stands 24h and distilled water is replaced by electrolyte, catholyte and anolyte respectively 0.01mol/LHNO to Osmotic balance3Solution and pH value are the citric acid of 2.5.
(5) energising: being energized 5 days under the potential gradient of 1.3V/cm, catholyte pH value controls at 2-4.
(6) heavy metal in smelting wastewater is under the effect of electronic-absorption United Technologies, in conjunction with electrolyte ph control, separates, enter in electrolyte from mud.
After process, in mud, the clearance of Cr is 15.17%, and the clearance of Cu is 24.72%, and the clearance of Ni is 69.09%, and the clearance of Zn is 73.29%, and the clearance of Fe is 25.38%.
Claims (5)
1. the method reclaiming heavy metal from heavy metal wastewater thereby mud, it is characterised in that comprise the following steps:
(1) sludge pretreatment: mud is carried out pretreatment with sulfuric acid solution, preprocess method is to be use magnetic stirrer 0.5-1h under 200-300r/min at rotating speed；
(2) electrolysis bath is loaded: mud layering good for pretreatment in (1) is loaded electrolysis bath, press even, distilled water is injected in catholyte chamber and anode electrolysis room, it is the HNO of 1-3 that distilled water is replaced by electrolyte, catholyte and anolyte respectively pH value by standing 12-36h to Osmotic balance3Solution and pH value are the citric acid of 1-3；
(3) energising: being energized 5-15 days under the potential gradient of 0.5-2V/cm, catholyte pH value controls at 2-7.
2. method according to claim 1, it is characterised in that the concentration of described sulfuric acid solution is 0.5-2mol/L.
3. method according to claim 1, it is characterised in that pretreated moisture percentage in sewage sludge is 70%-85%.
4. method according to claim 1, it is characterised in that in described step (2), is loading activated carbon in the electrolysis bath of cathode side.
5. method according to claim 1, it is characterised in that after experiment terminates, collects electrolyte, reclaims valuable metal therein, as general offal treatment after sludge heavy-metal is up to standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410736164.0A CN105712594A (en) | 2014-12-04 | 2014-12-04 | Method of recovering heavy metals from heavy metal wastewater and sludge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410736164.0A CN105712594A (en) | 2014-12-04 | 2014-12-04 | Method of recovering heavy metals from heavy metal wastewater and sludge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105712594A true CN105712594A (en) | 2016-06-29 |
Family
ID=56143758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410736164.0A Pending CN105712594A (en) | 2014-12-04 | 2014-12-04 | Method of recovering heavy metals from heavy metal wastewater and sludge |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105712594A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107265798A (en) * | 2017-06-29 | 2017-10-20 | 山东毅康科技股份有限公司 | A kind of method for sludge treatment |
| CN112047588A (en) * | 2020-09-02 | 2020-12-08 | 辽宁大学 | Method for removing heavy metals in municipal sludge by magnetization electric method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08155494A (en) * | 1994-12-07 | 1996-06-18 | Ishigaki Mech Ind Co | Method for eluting heavy metal from sludge |
| CN101265007A (en) * | 2008-04-11 | 2008-09-17 | 同济大学 | Method for removing heavy metal in urban sludge by employing electric repairing technique |
| CN101400611A (en) * | 2006-03-17 | 2009-04-01 | 谷元佳代彦 | Inorganic electrolyte setting agent capable of rendering heavy metal ion nonhazardous and method of treatment for utilization as resource therewith |
| CN202379858U (en) * | 2011-12-21 | 2012-08-15 | 山东省科学院新材料研究所 | Sludge treatment device |
-
2014
- 2014-12-04 CN CN201410736164.0A patent/CN105712594A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08155494A (en) * | 1994-12-07 | 1996-06-18 | Ishigaki Mech Ind Co | Method for eluting heavy metal from sludge |
| CN101400611A (en) * | 2006-03-17 | 2009-04-01 | 谷元佳代彦 | Inorganic electrolyte setting agent capable of rendering heavy metal ion nonhazardous and method of treatment for utilization as resource therewith |
| CN101265007A (en) * | 2008-04-11 | 2008-09-17 | 同济大学 | Method for removing heavy metal in urban sludge by employing electric repairing technique |
| CN202379858U (en) * | 2011-12-21 | 2012-08-15 | 山东省科学院新材料研究所 | Sludge treatment device |
Non-Patent Citations (1)
| Title |
|---|
| 张艳杰等: "阴极pH控制对电动去除电镀污泥重金属的影响", 《环境化学》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107265798A (en) * | 2017-06-29 | 2017-10-20 | 山东毅康科技股份有限公司 | A kind of method for sludge treatment |
| CN112047588A (en) * | 2020-09-02 | 2020-12-08 | 辽宁大学 | Method for removing heavy metals in municipal sludge by magnetization electric method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101748430B (en) | Copper recovery system of printed board acid etching waste solution and etching solution regeneration method | |
| Csicsovszki et al. | Selective recovery of Zn and Fe from spent pickling solutions by the combination of anion exchange and membrane electrowinning techniques | |
| CN104152905A (en) | Acidic copper chloride etching liquid electrolytic regeneration recycling and copper plate recovery device and method | |
| CN106904799B (en) | Electric repair strengthening device and method for removing heavy metals in sludge by using same | |
| CN106884185B (en) | The technique and system and device of copper in a kind of recycling acidic etching liquid | |
| WO2018129949A1 (en) | Production method and apparatus for electrodeposited cobalt with integrated manufacturing system | |
| CN103924085A (en) | Method for recovering copper zinc nickel from heavy metal sludge by using copper smelting waste acid | |
| CN102912375B (en) | Method and the special purpose device thereof of copper is reclaimed from acidic etching liquid | |
| CN101230470A (en) | Method for reclaiming metals by classified electrolysis of electron wastes | |
| CN105219964A (en) | A kind of processing method utilizing discarded nickel, copper tailings to reclaim nickel, copper | |
| CN105692977A (en) | Treatment method of high-concentration acidic copper-containing wastewater | |
| CN102839379A (en) | On-line treatment method of acidic etching solution | |
| CN105819595A (en) | Method for recycling gold in situ from gold-containing wastewater | |
| CN111621788A (en) | Method for recovering copper from alkaline etching waste liquid | |
| CN203976921U (en) | The circulation of acid copper chloride etching liquid electrolytic regeneration and copper coin retrieving arrangement | |
| ATE503864T1 (en) | ELECTROCHEMICAL PROCESS FOR THE RECOVERY OF FERROUS METAL AND CHLORINE RECYCLING MATERIALS FROM IRON-RICH METAL CHLORIDE WASTE | |
| CN101230469B (en) | Method for directly reclaiming metals from electron wastes | |
| CN105712594A (en) | Method of recovering heavy metals from heavy metal wastewater and sludge | |
| Jin | Towards source reduction and green sustainability of metal-bearing waste streams: The electrochemical processes | |
| CN104947155A (en) | Process for recovering copper from waste circuit board to prepare high purity and high strength copper foil based on electrochemical method | |
| CN103380234A (en) | Electro-recovery of gold and silver from leaching solutions by means of simultaneous cathodic and anodic deposition | |
| US8097132B2 (en) | Process and device to obtain metal in powder, sheet or cathode from any metal containing material | |
| CN104562015A (en) | Copper recovery system adopting on-line circulation of acidic etching solution | |
| CN105645703A (en) | Electrochemical control device for controlling pH value of electrolyte for electro-kinetic remediation of heavy metal sludge | |
| CN113025829B (en) | Method for treating copper ore smelting waste residues by applying bipolar membrane electrodialysis |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160629 |
|
| RJ01 | Rejection of invention patent application after publication |