JPH0199687A - Method for separating and removing iron, aluminum ion and/or suspended matter or the like by proton donation - Google Patents

Abstract

PURPOSE:To efficiently remove Fe and Al by supplying proton to a liquid contg. Fe, Al ions and/or suspended matter, etc., to flocculate the ions and coprecipitating the suspended matter together with the formed flocs. CONSTITUTION:The Fe and Al ions flocculate and form floc precipitate when the proton is donated to the above-mentioned ions and/or the suspended matter, etc. The suspended matter is adsorbed to the floc precipitate to form the coprecipitate which is separated and removed. The method for donating the proton includes a water electrolyzing method, ion exchange method, electron bombardment method, method or directly donating crystalline ore contg. water of crystallization having a proton releasing property, etc. The crystalline ore contg. the water of crystallization having the proton releasing property includes natural cristobalite, synthetic cristobalite, zerolites, etc., which have the characteristics of easy tendency to releasing of the proton.

Description

Detailed Description of the Invention "Industrial Application Field" Water or solutions containing iron, aluminum ions (hereinafter referred to as Fe) or suspended solids (hereinafter referred to as SS) must be used or disposed of. There are various disadvantages when doing so.

For example, in a water system, these ions become precipitates and accumulate in pipes as oxidation progresses, increasing the load in the pipes and eventually leading to blockage. Furthermore, if water is to be used for daily life, it is too pure water to be used for washing, much less for drinking, and for industrial use.
It is also unsuitable for agricultural water use. The present invention relates to a method for separating and removing Fe and/or AI ions from a liquid containing them by donating protons.

"Prior Art" Currently, coagulation precipitation, alkali precipitation, ion exchange, distillation treatment, etc. are used as Fe removal, AI ion treatment, and SS removal treatment.

"Problems to be Solved by the Invention" However, when implementing the conventional technology, a large amount of sludge is generated when coagulants, alkaline agents, etc. are used, and it becomes necessary to remove it. Even when carrying out this method, the processing cost increases, and in any case, it is not suitable for processing a large amount of liquid containing these ions.

"Means for Solving the Problems" As a result of intensive research to solve the above problems, the present inventor found that when protons are donated to a liquid containing Fe, AI ions, and/or SS, the ions become flocs. The present inventors have discovered that flocs precipitate, and the floating substances are adsorbed to the flocs precipitate to form coprecipitates, and have completed the present invention.

That is, the present invention reduces F in the liquid by donating protons to the liquid containing Fe, AI ions, and/or SS.
e. This relates to a method for separating and removing AI ions and/or SS.

Proton donation methods include water electrolysis, ion exchange, electron collision, direct donation of proton-releasing crystalline water-containing crystalline minerals, or proton-dissolved water obtained by the same method. be.

As the proton-releasing crystalline water-containing crystalline mineral, any material can be used as long as it has the property of easily releasing protons, such as natural cristobalite, synthetic tristopalite, and zeolites. The amount of proton donation sufficient to turn the ions and the like into floc precipitates is an amount that reduces pl+ by about 0.3 when the ions are donated to neutral water. The OpH value tends to be proportional to dissolved protons.

The present invention will be explained below with reference to Examples, but the present invention is not limited thereto.

In this example, a method using a proton-releasing crystalline water-containing crystalline mineral was used as the simplest, cheapest, and safest proton donor method.

“Example” The proton-releasing crystalline water-containing crystalline mineral used in this example has a size of 20 m/m or less and a 5ift 87.2%
, a natural cristobalite containing 5.25% water of crystallization.

As sample water, (11) Hii River flowing water, (2) Izumo region spring water, and (3) solution generated from the iron manufacturing process were used.

1 kg of the above natural cristobalite in water (pH 7.0)
■7! The sample is immersed in water and held for 3 to 8 hours to sufficiently release and dissolve protons in the water. In this case, the pH of the water containing dissolved protons is pl+ 5.20 after being maintained for 3 hours.
After holding for 8 hours, the pH was 4.05.

Next, this water was extracted, and 10n+j! and room 1 were added to 1! of each of the sample waters (11 to (3) above), mixed, and allowed to stand for 60 minutes.

Underwater and? Fe, AI ions, and/or SS in the solution settle quietly as floc-like precipitates, and the supernatant liquid has a high level of Fe-free, At-ion, and/or SS-free
showed a trend.

Untreated cough water or untreated solution, treated water or treated solution were all analyzed by JIS method. The analysis results are shown in the numerical table.

(The following margins continue on the next page) "Effects of the Invention" This treatment technology does not use any precipitating agents such as flocculants or alkaline agents, so it is entirely possible that a large amount of sludge will be generated. This method has a special effect in that even trace amounts of ions and/or SS contained in any water or solution can be separated and removed with a simple device, easy operation, and low cost.

Claims (1)

[Claims] A method for separating and removing iron, aluminum ions, and/or suspended solids in a liquid by donating protons to the liquid containing iron, aluminum ions, and/or suspended solids.