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Many industrial manufacturing processes produce wastewaters containing heavy metals. Industries include printed circuit board manufacturing, metal finishing, automotive, aerospace, semiconductor manufacturing, electroplated metal parts/washing, textile dyes and steel, to name a few. As a result of improper treatment prior to discharge, many dissolved metals have been found in harmful concentrations in groundwaters which are destined for potable drinking water. In small quantities, certain heavy metals are nutritionally essential for a healthy life, but large amounts of any of them may cause acute or chronic toxicity (poisoning).The metals most often linked to human poisoning have links to learning disabilities; cancers and death are typically caused by copper, nickel, cadmium, chrome, arsenic, lead and mercury. Many of these metals are required by humans in trace amounts, but in larger, persistent dosages, these heavy metals become toxic when they are not metabolized by the body and accumulate in the soft tissues. Heavy metal toxicity can result in damaged or reduced mental and central nervous function, lower energy levels, and damage to blood composition, lungs, kidneys, liver, and other vital organs. The most commonly encountered toxic heavy metals include:
Other heavy metals of concern include:
In addition to concerns for human health and the environment, an increased desire to reuse and/or recycle industrial wastewaters also requires that metals removal occur in order to meet influent water quality requirement needed by the manufacturing process and equipment.
Ion exchange is a proven technology with effective treatment results for the removal of dissolved metals. Siemens Water Technologies offers permanent, hard-piped ion exchange treatment systems containing contaminant-specific treatment resins, as well as removable systems. Our service ion exchange approach integrates equipment and service option combinations, thereby minimizing a plant’s capital investment and reduces overall space requirements. The system components are selected based upon available manpower, space limitations, access limitation and the specific water quality required. Service ion exchange provides the ultimate flexibility to add or remove treatment capacity as your business grows or compliance limits change.
Microfiltration technology also offers a cost effective and sustainable solution for removal of heavy metals in wastewater and for water reuse applications. The membrane provides for an absolute barrier to the passage of solids and therefore is capable of removing metals (and other contaminants) to their solubility limits.
Iron and manganese have secondary MCLs (SMCLs) of0.3 and0.05 mg/L, respectively.These SMCLs have been considered as safe limits to avoid the staining of plumbing fixturesand laundry, but experience shows that lower levels are desired to avoid difficulties.Targets of <0.1 mg/L iron and <0.02 mg/L manganese should be normal water.quality goals.Dissolved iron and manganese are normally in the reduced state (Fe II and Mn II) andcan be removed by oxidizing to Fe III and Mn IV, where they will precipitate as Fe(OH)3and Mn(OH)2. Precipitates are subsequently removed in sedimentation and/or filtrationsteps. Several oxidants are available for this process, namely, chlorine, chlorine dioxide,ozone, and potassium permanganate. They are also removed through conventional limesoftening treatment.
by make airation of the water to be treated i think this best way without chemical treatment
By the addition of chemicals
cloronation . coagulant . polyelectrolite . untiscale . sodium meta by sulfate . tri sodum phospate . h2so4) sulfuric asid) . soda . soda ash . lim0)(
And pass water through sand filters and water treatment united and disarm the positive and negative salt
multi grade filter
strong acid cation
degazification
strong base anion
weak base anion
mixed bed
polisher
R.O
بأضافة الكلور في Rewater tank وبذلك يتم تحويل الحديد الي حديدوز ويذوب في الماء بعد ذلك ويتم إختزال الكلور بعد ذلك بإضافة مادة الSBS g لتحويل الكلور من مادة نشطه الي مادة خامله.
1.The water water must first be chlorinated from1 to3 ppm.
2. The chlorinated water must be filtered through the green sand OR BIRM filter to remove iron and manganese.
السلام عليكم يمكن ازالة ملح الحديد بالاكسدة عن طريق مادة مؤكسده قوية مثل برمنجانات البوتاسيوم وذلك حتى يتم تحويل ملح الحديد من الصورة الذائبه الى صوره غير ذائبه يمكن ترسيبها والافضل من ذلك استخدام الاكسدة بالهواء (الاكسجين ) باستخدام ضواغط الهواء ثم بعدها عملية الفلترة بالفلاتر الرمليه الخاصة او غيرها من الفلاتر
green sand filter or pirm filter will give you the best result without using any chemical
if any other data you need it, you can call me
