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Nano quantum dot adsorption and film separating system for removing heavy metal in water

A nano-quantum dot and membrane separation system technology, which is applied in the field of nano-quantum dot adsorption and membrane separation systems, can solve the problems of low cross-flow rate of the membrane system, low energy consumption of system operation, and difficult separation of waste water, etc., achieving short hydraulic retention time , The energy consumption of the system is low, and the water quality is good.

Active Publication Date: 2015-12-09
上海一途膜分离技术有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to solve the above-mentioned deficiencies and provide a nano-quantum dot adsorption and membrane separation system for removing heavy metals in water, which can realize continuous operation, large adsorption capacity, small system footprint, no need to add chemicals, and no sludge It overcomes the shortcomings of the existing traditional heavy metal adsorbents such as small adsorption capacity, poor adsorption capacity, and difficulty in separating from wastewater after adsorption and precipitation.

Method used

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  • Nano quantum dot adsorption and film separating system for removing heavy metal in water

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Effect test

Embodiment 1

[0040] Wastewater containing heavy metals from an electroplating factory in Shanghai, Cr 3+ , Cu 2+ , Ni + The concentration of the air is 0.84ppm, 211ppm and 3.1ppm respectively. After 10min of adsorption reaction, the air volume of fine aeration is 50L / min / m 2 The bottom area of ​​the pool, the stirring speed is 100rpm, the mixed liquid enters the membrane system for separation, the membrane filtration system uses a tubular ultrafiltration membrane with a separation pore size of 0.05μm, the membrane material is PVDF, the flow rate in the tube is 1.5m / s, and the amount of fine air scrubbing 2L / min / m 2 Membrane area, Cr in permeate water 3+ , Cu 2+ , Ni + The concentrations were 0.0184ppm, 0.0464ppm, and 0.0367ppm, respectively.

Embodiment 2

[0042] Wastewater containing heavy metals from a metal surface treatment company in Anhui, Zn 2+ , Mn 2+ , Ni + The concentrations are 68.6ppm, 54.3ppm, and 53.9ppm, respectively. After 30min of adsorption reaction, the air volume of fine aeration is 100L / min / m 2 The bottom area of ​​the pool, the stirring speed is 50rpm, the mixed liquid enters the membrane system for separation, the membrane filtration system uses a tubular microfiltration membrane with a separation pore size of 0.1μm, the membrane material is ceramic, the flow rate in the tube is 2m / s, and the volume of fine air scrubbing is 1L / min / m 2 Membrane area, Zn in permeate water 2+ , Mn 2+ , Ni + The concentrations were 0.0052 ppm, 0.00312 ppm, and 0.0153 ppm, respectively.

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Abstract

The invention relates to a nano quantum dot adsorption and film separating system for removing heavy metal in water, which comprises a waste water storage tank (3); the waste water storage tank (3) is connected with an adsorption reaction tank (5) internally provided with a fine aeration system (6) and a stirring apparatus (7); a magnetic organic carbon carrier (8) is cast into the adsorption reaction tank (5) connected with a gas wiping cross flow film system (10) by a circulation pump (9); the gas wiping cross flow film system (10) is connected to the adsorption reaction tank (5) of which the bottom is connected with an oblique pipe deposition tank (16); the outlet of the oblique pipe deposition tank (16) is connected with a press filter (18) by a sludge pump (17) and the press filter (18) is connected to the oblique pipe deposition tank (16). The nano quantum dot adsorption and film separating system can realize continuous operation, is large in adsorption capacity, small in occupation space without the need of adding chemical agents and generation of sludge, and is small in film system cross flow rate, high in film separation precision and low in system operation energy consumption.

Description

[Technical field] [0001] The invention relates to the technical field of heavy metal wastewater treatment, in particular to a nano quantum dot adsorption and membrane separation system for removing heavy metals in water. [Background technique] [0002] Heavy metal pollution of water is a global problem. Based on normal human production, social activities and sudden water pollution accidents, according to statistics, my country's population polluted by heavy metals accounts for about 30% of the world's population. Given that heavy metals, especially Cd 2+ , Cr 3+ , Cr 6+ , Cu 2+ , Hg 2+ , Pb 2+ , Zn 2+ , Ni + Many countries and the World Health Organization have formulated increasingly strict standards for the content of heavy metals in wastewater and drinking water. [0003] With the increasingly strict environmental protection requirements in my country, the sewage discharge standards are also becoming more and more strict, and the discharge standards for heavy was...

Claims

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Application Information

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IPC IPC(8): C02F9/12
Inventor 宋兴涛刘敏韩芳
Owner 上海一途膜分离技术有限公司
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