Modified water purification sludge loaded nanometer zero-valent iron material and its preparation method and application

A nano-zero valent iron, water purification technology, applied in water/sludge/sewage treatment, water pollutants, water/sewage treatment, etc., can solve problems such as high cost and unenvironmental protection, and achieve high reactivity and uniform distribution Effect

Active Publication Date: 2020-10-16
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention proposes a modified water purification sludge loaded nano-zero-valent iron material and its preparation method, the purpose of which is to solve the problems of high cost and non-environmental protection in the current technology of loading nano-zero-valent iron, and at the same time, the loading material in the preparation method of the invention is simple and easy The process of obtaining and synthesizing is easy and easy to operate

Method used

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  • Modified water purification sludge loaded nanometer zero-valent iron material and its preparation method and application
  • Modified water purification sludge loaded nanometer zero-valent iron material and its preparation method and application
  • Modified water purification sludge loaded nanometer zero-valent iron material and its preparation method and application

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Effect test

Embodiment 1

[0034] A nanometer zero-valent iron material loaded with modified water purification sludge, the specific production steps are as follows:

[0035] Place the fresh water purification sludge in a blast oven at 120°C for 12 hours, grind it through a mesh sieve, and select water purification sludge particles with an average particle size of 100 microns for use; take a certain quality of spare water purification sludge particles and place them at 500°C Calcined in a muffle furnace for 3 hours, transferred to 3mol / L HCl solution and soaked for 10 hours after cooling, took out the water purification sludge, washed it with distilled water until neutral and dried to obtain modified water purification sludge;

[0036] The configuration concentration is 1mol / L NaBH 4 Solution, according to the solid-liquid ratio of 1:60, the concentration is 0.3 mol / L Fe(NO 3 ) 3 •9H 2 O solution was added with modified water purification sludge and shaken for 310 min at room temperature at 25°C to o...

Embodiment 2

[0040] The modified water purification sludge loaded nano-zero-valent iron material has a strong removal effect on Cr(VI) in the water body. When the Cr(VI) concentration in the water body is 20mg / L, the modified water purification sludge loaded with nano After the zero-valent iron material was shaken for 3.5 hours, the concentration of Cr(VI) dropped to 0.8mg / L, and the removal rate reached 96%. The following is the experimental scheme for removing Cr(VI) from water by loading nanometer zero-valent iron on modified water purification sludge.

[0041] 1. Experimental equipment and reagents

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Abstract

The invention relates to a modified water purification sludge loaded nano-zero-valent iron material and a preparation method thereof. The modified water-purification sludge is used as a nano-zero-valent iron loading carrier, and the average particle size of the modified water purification sludge is 75um ~150um, specific surface area 50~80m² / g, the size of the nanometer zero-valent iron loaded on the modified water purification sludge is 200~500nm, and the loading capacity is 10~15wt%; its preparation method is: first the average particle size is The 75um-150um water purification sludge particles are modified by high temperature and acid to prepare modified water purification sludge, and then the modified water purification sludge is used to synthesize nano zero-valent iron materials loaded with liquid phase reduction method. The modified water purification sludge loaded nano-zero-valent iron material of the present invention not only retains the adsorption capacity of the modified water-purification sludge, but also utilizes the reduction effect of nano-zero-valent iron to repair water bodies polluted by Cr(VI). Has a high removal efficiency.

Description

technical field [0001] The invention relates to a modified water purification sludge loaded nanometer zero-valent iron material and a preparation method thereof, in particular to preparing modified water purification sludge through high-temperature and acid modification of the water purification sludge to modify the net Water sludge was used as raw material to prepare nano-scale zero-valent iron material loaded with modified water purification sludge by liquid phase reduction method, and it was used in the restoration of water polluted by Cr(VI). Background technique [0002] Water purification sludge is solid waste produced in the production process of water supply companies. It has the general characteristics of soil and mainly contains elements such as Si, Al and O. Unmodified water purification sludge has cohesiveness, high content of inorganic components and The specific surface area is small. In the process of preparing the adsorbent, it is generally necessary to modif...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F1/28C02F1/70C02F1/62B01J20/02B01J20/30
CPCC02F1/281C02F1/705C02F2101/22
Inventor 王东田江宇朱加豆魏杰
Owner SUZHOU UNIV OF SCI & TECH
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