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A preparation method of renewable modified shale ceramsite phosphorus removal filler

A shale ceramsite and modification technology, applied in chemical instruments and methods, biological water/sewage treatment, inorganic chemistry, etc., can solve the problems of low concentration phosphorus removal ability, poor regeneration, high preparation cost, and achieve good The effect of repeated use ability, strong phosphorus removal ability and good adaptability

Active Publication Date: 2017-11-03
WUHAN ZHONGKE HYDROBOLOGY ENVIRONMENTAL ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional phosphorus removal fillers are mainly clay minerals, industrial waste, natural or artificial porous materials, etc. Some materials have a good removal effect on high-concentration phosphorus, but have limited ability to remove low-concentration phosphorus; Phosphorus has strong ability, but poor reproducibility, needs to be replaced regularly, and cannot be reused; some materials are expensive to prepare, although the adsorption capacity is large, but the cost performance is low

Method used

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  • A preparation method of renewable modified shale ceramsite phosphorus removal filler
  • A preparation method of renewable modified shale ceramsite phosphorus removal filler

Examples

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Effect test

Embodiment 1

[0022] A preparation method for renewable modified shale ceramsite phosphorus removal filler, comprising the following steps:

[0023] Step 1. Soak shale ceramsite with a particle size of 4~6mm in 0.30~0.40mol / L HCl solution for 16~20h, wash with tap water first, and then wash with distilled or deionized water until the pH of the washing water is Neutral, then dry at 100~105°C for 8~10h to obtain dried shale ceramsite;

[0024] Step 2, ZnCl 2 , AlCl 3 , FeCl 3 According to the ratio of Zn:Al:Fe molar ratio of 1:(0.1~0.12):(0.35~0.40), the metal salt solution is prepared, and the Zn in the solution 2+ The concentration is 0.8~1.1mol / L;

[0025] Step 3. Slowly add the metal salt solution to the dried shale ceramsite, the volume ratio of the dried shale ceramsite to the metal salt solution is 1:(1~1.5); the mixing process is carried out at a temperature of 40±2°C , Oscillating at a vibration speed of 60~75r / min, and adjusting the pH value by adding NaOH solution with a conce...

Embodiment 2

[0033] A preparation method for renewable modified shale ceramsite phosphorus removal filler, comprising the following steps:

[0034] Step 1. Soak the shale ceramsite with a particle size of 6~8mm in 0.40~0.50mol / L HCl solution for 20~24h, wash it with tap water first, and then wash it with distilled water or deionized water until the pH of the washing water is Neutral, then dry at 105~110°C for 10~12h to obtain dried shale ceramsite;

[0035] Step 2, ZnCl 2 , AlCl 3 , FeCl 3 According to the ratio of Zn:Al:Fe molar ratio of 1:(0.12~0.15):(0.40~0.45), the ratio of Zn:Al:Fe to make metal salt solution, Zn in the solution 2+ The concentration is 1.1~1.5mol / L;

[0036] Step 3. Slowly add the metal salt solution to the dried shale ceramsite. The volume ratio of the dried shale ceramsite to the metal salt solution is 1:(1.5~2); the mixing process is carried out at a temperature of 40±2°C , Oscillate at a vibration speed of 75~90r / min, and adjust the pH value by adding NaOH so...

Embodiment 3

[0044] A preparation method for renewable modified shale ceramsite phosphorus removal filler, comprising the following steps:

[0045] Step 1. Soak the shale ceramsite with a particle size of 4~6mm in 0.35mol / L HCl solution for 18 hours, wash it with tap water first, and then wash it with distilled water or deionized water until the pH value of the washing water is neutral, then Dry at 105°C for 8 hours to obtain dried shale ceramsite;

[0046] Step 2, ZnCl 2 , AlCl 3 , FeCl 3 According to the ratio of Zn:Al:Fe molar ratio of 1:0.1:0.36, the metal salt solution is formulated, and the Zn in the solution 2+ The concentration is 0.85 / L;

[0047] Step 3. Slowly add the metal salt solution to the dried shale ceramsite. The volume ratio of the dried shale ceramsite to the metal salt solution is 1:1.2; Shake at a high speed, and adjust the pH value by adding NaOH solution with a concentration of 1.2mol / L, and keep the pH value stable at 10±0.2 during the whole process; after the...

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Abstract

The invention discloses a preparation method of a reproducible modified shale ceramsite phosphorus removal filler. The shale ceramsite is soaked in HCl solution, then cleaned until the pH value is neutral and then dried; ZnCl2, AlCl3 and FeCl3 are mixed in proportion Prepare a metal salt solution; slowly add the metal salt solution to the dried shale ceramsite and oscillate at a constant temperature while adjusting the pH value; bake at high temperature to obtain a mixed solution; filter out the ceramsite in the mixed solution, wash until neutral, Finally, it is dried to obtain a renewable modified shale ceramsite phosphorus removal filler. The invention has strong phosphorus removal ability, good reusability, relatively cheap raw materials, and high cost performance.

Description

technical field [0001] The invention relates to the technical field of phosphorus removal fillers, in particular to a preparation method of reproducible modified shale ceramsite phosphorus removal fillers. Background technique [0002] Eutrophication of water body is one of the main water pollution problems faced by our country. Controlling the concentration of phosphorus in the tail water of sewage treatment plants is an important measure to prevent and control eutrophication of water body. [0003] As the core of sewage treatment processes such as constructed wetlands, artificial rapid infiltration, and biological filters, fillers are directly related to whether the effluent of the project meets the standard. The development of economical and efficient phosphorus removal fillers is of great significance to the protection of the water environment. Traditional phosphorus removal fillers are mainly clay minerals, industrial waste, natural or artificial porous materials, etc. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/10B01J20/32C02F1/28C02F1/58C02F3/00
Inventor 刘志军王硕夏艳阳刘恋刘琦
Owner WUHAN ZHONGKE HYDROBOLOGY ENVIRONMENTAL ENG
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