Analysis and purification of water from a well from iron: an overview of filters


Well water among con­sumers is often syn­ony­mous with ide­al. But in fact, she is not rare char­ac­ter­ized by increased min­er­al­iza­tionespe­cial­ly for arte­sian wells.

fer­rug­i­nous water has a wide range of neg­a­tive effectsso it needs to be cleaned up.

We will talk about how to inde­pen­dent­ly ana­lyze it and get rid of iron in the water in our arti­cle.

Iron in water and harm from it

Con­sid­er­ing any impu­ri­ty in water, its neg­a­tive impact on the human body and its eco­nom­ic activ­i­ty and prop­er­ty is assessed. As for iron, on the sec­ond point, its harm is obvi­ous and more tan­gi­ble.rust in pipes

  1. Over­growth of water pipes from the inside with a brown coat­ing, which in turn accel­er­ates the oxi­da­tion and pre­cip­i­ta­tion of new por­tions of iron from water. As a result, the lumen of the tube decreas­es up to com­plete obstruc­tion.
  2. Plaque forms on san­i­tary ware, which is very dif­fi­cult to remove.
  3. From glan­du­lar sed­i­ment water heaters are dam­aged.
  4. Rusty smudges remain on clothes washed in fer­rug­i­nous water. This is espe­cial­ly impor­tant not only in every­day life, but also in the tex­tile indus­try.
  5. Cooked food may have an unpleas­ant after­taste.

In the media and soci­ety, you can often hear about the neg­a­tive effects of fer­rug­i­nous water on the body. At the same time, which organs and sys­tems this met­al affects is said some­how vague­ly: aller­gies, accu­mu­la­tion in the liv­er and pan­creas, risk of heart attacks. Basi­cal­ly com­mon words.

faucet rustAccord­ing to the WHO, fer­rug­i­nous water does not have such a neg­a­tive effect on the human body and ani­mals. And this is due pri­mar­i­ly to the fact that this trace ele­ment is very poor­ly absorbed.

Best of all, the body takes it in an organ­ic form from food, pri­mar­i­ly of ani­mal ori­gin. In this case, the absorp­tion coef­fi­cient depends on the con­tent of oth­er sub­stances: vit­a­mins increase it, but some com­pounds, such as cal­ci­um, reduce it.

There­fore, to increase hemo­glo­bin with rusty water is a utopi­an hope.

Of course, with pro­longed use in drink­ing water with a high iron con­tent, this the met­al will accu­mu­late in the liv­er, even­tu­al­ly destroy­ing the cells. But such water does not taste very pleas­ant, so the con­sumer is unlike­ly to agree to drink it.

But the truth can cause aller­gies, because the cause of this pathol­o­gy of the immune sys­tem can be any.

How to determine iron in water? Verification and research

Analysis of ferrous water at home

Qual­i­ta­tive analy­sis can be car­ried out at home. Usu­al­ly, after flush­ing the well, the water from it is clear. It can put in a jar and leave for a few hoursor even days.

To speed up the reac­tion, water can be mixed well to sat­u­rate the air with oxy­gen. If the water is cloudy after soak­ingand then becomes brown with sed­i­ment, then this says that she is fer­rous.

This reac­tion also indi­cates that this the met­al in well water is in a sol­u­ble diva­lent formand under the action of oxy­gen, it is oxi­dized to a triva­lent state, which in the form of an insol­u­ble pre­cip­i­tate falls to the bot­tom.

In addi­tion, the fact that iron is present in the water indi­cates:

  • metal­lic taste of water;
  • rust deposits on plumb­ing;
  • stains on clothes after wash­ing.

But such an analy­sis is not enough for the selec­tion of equip­ment for clean­ing.

Before the oper­a­tion of any new drink­ing source, includ­ing for pri­vate water use, it is nec­es­sary to do a water analy­sis.

Take the sam­ple to a lab­o­ra­to­ry, such as the local Vodokanal or Rospotreb­naz­dor.

Where, using a pho­to­elec­tric col­orime­ter or spec­topho­tome­ter, a quan­ti­ta­tive analy­sis of water will be car­ried out.

Iron removal methods

The removal of iron from water is called iron removal. There are many method­olo­gies Their choice depends on sev­er­al fac­tors:

  • ini­tial water qual­i­ty, includ­ing all impu­ri­ties;
  • the required degree of purifi­ca­tion;
  • vol­umes of water con­sump­tion and fre­quen­cy of use of the well;
  • con­sumer bud­get.

For well water, meth­ods are applic­a­ble, the action of which is aimed at remov­ing fer­rous iron.

reverse osmosis system

reverse osmosis system

This way late­ly enjoys wide pop­u­lar­i­ty. In such instal­la­tions, pres­sure is cre­at­ed that forces water mol­e­cules to move from an area of ​​high to an area of ​​low salt con­tent, pass­ing through a mem­brane that is per­me­able only to water. This process is usu­al­ly pre­ced­ed by pass­ing the liq­uid to be puri­fied through a coarse fil­ter.

Scheme and principle of operation of reverse osmosis

The degree of purifi­ca­tion is very high. Not only iron salts are removed, but also oth­er impu­ri­ties, includ­ing infec­tious agents. It turns out almost dis­tilled water. But this is the minus of the method, since dem­iner­al­ized water is harm­ful to the body.

This method can be used for uni­ver­sal clean­ing of well water.used for drink­ing needs of a pri­vate house. It will be enough to install a three‑, four- or five-cas­sette small instal­la­tion under the kitchen sink, the price of which is 7 — 80 $. It pro­vides for the stage of addi­tion­al intro­duc­tion of salts into the water after purifi­ca­tion by reverse osmo­sis.

If there is a desire to puri­fy water for the whole house in this way, includ­ing for the bath­room and toi­let, you can pur­chase a high­er capac­i­ty unit with a stor­age tank. The price of such equip­ment is about 900 $, it all depends on the pow­er.

Ion exchange

Ion exchange - scheme

If there is iron in the water in a con­cen­tra­tion not exceed­ing 1–2 mg / l, then you can get rid of it using fil­ters. They are loaded with ion-exchange resins, the cations of which are replaced by iron ions.

An impor­tant con­di­tion is the acidic envi­ron­ment of water (pH less than 7)which slows down the process of iron oxi­da­tion. In par­al­lel, man­ganese is removed from the water.

ion exchange filter

But this method is not the most suc­cess­ful for remov­ing iron, since resins often require regen­er­a­tion and even replace­ment. It is often used to soft­en water, and iron removal occurs along the way. The cost of such an instal­la­tion for a pri­vate house can be an aver­age of 400–450$.

How to pro­tect the foun­da­tion and base­ment with a drainage sys­tem around the house. Types of drainage sys­tems.

From this arti­cle you will learn how to weld polypropy­lene pipes. Detailed instruc­tions and nec­es­sary tools.

Cleaning methods with pre-oxidation

it the most tra­di­tion­al way of defer­riza­tionused both in pri­vate homes and on an indus­tri­al scale. It includes the oxi­da­tion of water with fur­ther fil­tra­tion, and in some cas­es set­tling.

For such clean­ing, know the orig­i­nal chem­istry of the liq­uid, espe­cial­ly its pH. The high­er the val­ue of this para­me­ter, the more effi­cient the oxi­da­tion process­es.

iron removal with pre-aeration

  • Iron removal with pre-aer­a­tion is used very often and requires the least cost. This method is well suit­ed for the removal of high con­cen­tra­tions of fer­rous iron. Water, into which air is pre­lim­i­nar­i­ly sup­plied by a com­pres­sor, is passed through a fil­ter, where oxi­dized iron set­tles on the load.
  • A spe­cial case of such water treat­ment is cat­alyt­ic oxi­da­tion. It is dis­tin­guished by a spe­cial fil­ter bed coat­ed with a film that accel­er­ates the oxi­da­tion process. This load­ing mod­i­fi­ca­tion helps to effec­tive­ly remove not only iron, but also man­ganese.

cleaning with ozone

  • For oxi­da­tion in some cas­es, ozoniz­ers are used, since ozone is not only a strong oxi­diz­ing agent, but also dis­in­fects water.

Fil­ter cost depends on the method of wash­ing, pow­er and ranges from 70 $. The aver­age price of such sys­tems is 350 $. For the effec­tive oper­a­tion of such clean­ing, it is nec­es­sary to strict­ly fol­low the instruc­tions that accom­pa­ny the equip­ment, and it is bet­ter to entrust com­mis­sion­ing work to pro­fes­sion­als.

If the well is planned to be used inter­mit­tent­ly, for exam­ple, only dur­ing the sum­mer sea­son, and the water con­sump­tion is small, then aer­a­tion can be done in a sim­pli­fied way, and then the water can sim­ply be defend­ed.

To do this, you need any clean tank with a min­i­mum vol­ume of 1 m³. Water is sup­plied to it through an irri­ga­tion sys­tem. Such a show­er is a kind of do-it-your­self aer­a­tion.

Electromagnetic iron removal

electromagnetic iron removal

Purifi­ca­tion of water from iron using elec­tro­mag­net­ic waves is a fair­ly new, but effec­tive method that can only be used in lab­o­ra­to­ry con­di­tions.

Water quality standards

The qual­i­ty of drink­ing water is reg­u­lat­ed by the San­i­tary Norms and Rules San­Pin–01. “Hygien­ic require­ments for water qual­i­ty of cen­tral­ized drink­ing water sup­ply sys­tems. Qual­i­ty con­trol”.

This gov­ern­ment doc­u­ment con­tains tables that indi­cate MPC of harm­ful sub­stances and their haz­ard class. For iron, this indi­ca­tor is 0.3 mg/l.

San­Pin 01 down­load

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