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A flow-type photoelectrochemical system and method for resource recovery in high-salt wastewater

A photoelectrochemical, high-salt wastewater technology, applied in chemical instruments and methods, electrochemical water/sewage treatment, water pollutants, etc., can solve problems such as increased wastewater treatment cost per ton, decreased electrode stability, and poor effluent quality. , to achieve the effect of good effluent quality, low cost and strong power generation capacity

Active Publication Date: 2022-01-25
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, inorganic ions mainly composed of chloride ions are easy to damage the surface film structure of metal electrodes, resulting in reduced electrode stability, poor effluent quality, and increased cost per ton of wastewater treatment.

Method used

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  • A flow-type photoelectrochemical system and method for resource recovery in high-salt wastewater
  • A flow-type photoelectrochemical system and method for resource recovery in high-salt wastewater
  • A flow-type photoelectrochemical system and method for resource recovery in high-salt wastewater

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Experimental program
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Embodiment approach

[0062] According to a preferred embodiment of the present invention, the photoanode is selected from one or more of titanium dioxide, carbon quantum dots, ferric oxide, tungsten oxide, molybdenum disulfide, bismuth vanadium tetroxide and Mxene, but not limited to The above materials are preferably selected from one or more of titanium dioxide, carbon quantum dots, tungsten oxide, molybdenum disulfide and Mxene, more preferably selected from one or more of titanium dioxide, carbon quantum dots, tungsten oxide and molybdenum disulfide kind.

[0063] The metal cathode is selected from stainless steel, aluminum alloy, carbon steel, brass, nickel-based materials or platinum sheets, but not limited to the above materials, preferably selected from stainless steel, carbon steel, brass or platinum sheets, more preferably selected from stainless steel or platinum sheets .

[0064] The external circuit includes wires connecting the photoanode and the metal cathode. The length of the wir...

Embodiment 1

[0089] use as figure 2 The photoanode shown is titanium dioxide, carbon quantum dots and tungsten oxide, the metal cathode is Pt (platinum), the length of the wire (made of brass) is 5 cm, and the flow type photoelectrochemical system for resource recovery is set with a light-transmitting quartz window. Organic matter (carbamazepine, CBZ) concentration was 5 mol / L, heavy metal (Cu 2+ ) concentration of 0.5 mol / L, salt concentration of 0.5% high-salt wastewater (solution volume 1 L), the flow rate was set at 5 mL / min. The light intensity is set to 1 sun.

[0090] After 180 min of reaction, the degradation efficiency of CBZ in wastewater was measured to be 75.62%, Cu 2+ The recycling efficiency is 52.55%, and the electricity production is 56.57 W / (m 3 Solution×m 2 electrode area).

[0091] After 48 h of reaction, the degradation efficiency of CBZ in wastewater was measured to be 73.85%, Cu 2+ The recycling efficiency is 9.34%, and the electricity production is 45.34 W / (m ...

Embodiment 2

[0093] Repeat the process of Example 1, the only difference is: the photoanode is titanium dioxide, carbon quantum dots and molybdenum disulfide.

[0094] After 180 min of reaction, the degradation efficiency of CBZ in wastewater was measured to be 68.83%, Cu 2+ The recycling efficiency is 48.61%, and the electricity production is 52.84 W / (m 3 Solution×m 2 electrode area).

[0095] After 48 h of reaction, the degradation efficiency of CBZ in wastewater was measured to be 56.34%, Cu 2+ The recycling efficiency is 8.56%, and the electricity production is 37.09 W / (m 3 Solution×m 2 electrode area).

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Abstract

A flow-type photoelectrochemical system for resource recovery in high-salt wastewater. The invention provides a flow-type photoelectrochemical system and its application method utilizing high-salt wastewater to generate electricity and synchronously degrade organic matter and recover heavy metals. The photoelectrochemical system includes a photoelectrochemical reactor and a water circulation system. Anode, metal cathode, external circuit and water-cooled circulation system, the photoelectrochemical system does not require external energy input, only needs to be excited by visible light to generate electricity, and has the performance of organic matter degradation and simultaneous heavy metal recovery, and can achieve long-term in high-salt environment Stable operation.

Description

technical field [0001] The invention belongs to the technical field of waste water recycling, and relates to a visible light-driven flow photoelectrochemical (FPEC) system and a method and application thereof for degrading organic matter in high-salt waste water and recovering heavy metals and electric energy. Background technique [0002] The unbalanced development between economy and resources has led to the attention of resource technology. Wastewater is rich in organic matter and metal ions and is a potential resource. The process of recycling waste water is accompanied by energy consumption. As a kind of green energy, solar energy can be continuously transformed into the driving force of waste water recycling. However, limited by factors such as low photoelectric conversion efficiency and unclear mechanism, the light-driven wastewater recycling technology is limited. [0003] The treatment of high-salt wastewater has always been a difficult point in the field of wate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/46C02F1/30C02F101/30C02F101/20
CPCC02F1/46C02F1/30C02F2101/30C02F2101/20C02F2201/46
Inventor 何小松崔骏席北斗邓雪娇涂响裴元生
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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