مجموعة تكنولاب البهاء جروب

تحاليل وتنقية ومعالجة المياه
 
الرئيسيةالبوابةمكتبة الصورس .و .جبحـثالأعضاءالمجموعاتالتسجيلدخول
تنظيف وتطهير وغسيل واعادة تاهيل الخزانات


معمل تكنولاب البهاء جروب
 للتحاليل الكيميائية والطبية
والتشخيص بالنظائر المشعة
 للمخدرات والهرمونات والسموم
 وتحاليل المياه

مجموعة
تكنولاب البهاء جروب
لتصميم محطات الصرف الصناعى والصحى
لمعالجة مياه الصرف الصناعى والصحى
مجموعة تكنولاب البهاء جروب
المكتب الاستشارى العلمى
دراسات علمية كيميائية



معالجة الغلايات وانظمة البخار المكثف
معالجة ابراج التبريد المفتوحة
معالجة الشيللرات
مجموعة تكنولاب البهاء جروب
اسنشاريين
كيميائيين/طبيين/بكترولوجيين
عقيد دكتور
بهاء بدر الدين محمود
رئيس مجلس الادارة
استشاريون متخصصون فى مجال تحاليل وتنقية ومعالجة المياه
متخصصون فى تصنيع وتصميم كيماويات
معالجة الصرف الصناعى والصحى
حسب كل مشكلة كل على حدة
تصنيع وتحضير كيماويات معالجة المياه الصناعية
مؤتمرات/اجتماعات/محاضرات/فريق عمل متميز
صور من وحدات معالجة المياه


technolab el-bahaa group
TECHNOLAB EL-BAHAA GROUP
EGYPT
FOR
WATER
TREATMENT/PURIFICATION/ANALYSIS
CONSULTANTS
CHEMIST/PHYSICS/MICROBIOLIGIST
 
INDUSTRIAL WATER
WASTE WATER
DRINKING WATER
TANKS CLEANING
 
CHAIRMAN
COLONEL.DR
BAHAA BADR EL-DIN
0117156569
0129834104
0163793775
0174041455

 

 

 

تصميم وانشاء محطات صرف صناعى/waste water treatment plant design

technolab el-bahaa group
egypt
We are a consultants in water treatment with our chemicals as:-
Boiler water treatment chemicals
Condensated steam treatment chemicals
Oxygen scavenger treatment chemicals
Ph-adjustment treatment chemicals
Antiscale treatment chemicals
Anticorrosion treatment chemicals
Open cooling tower treatment chemicals
Chillers treatment chemicals
Waste water treatment chemicals
Drinking water purification chemicals
Swimming pool treatment chemicals
Fuel oil improver(mazote/solar/benzene)
technolab el-bahaa group
egypt
We are consultants in extraction ,analysis and trading the raw materials of mines as:-
Rock phosphate
32%-30%-28%-25%
Kaolin
Quartez-silica
Talcum
Feldspae(potash-sodumic)
Silica sand
Silica fume
Iron oxid ore
Manganese oxid
Cement(42.5%-32.5%)
Ferro manganese
Ferro manganese high carbon

 

water treatment unit design


 

وكلاء لشركات تركية وصينية لتوريد وتركيب وصيانة الغلايات وملحقاتها
solo agent for turkish and chinese companies for boiler production/manufacture/maintance

 

وكلاء لشركات تركية وصينية واوروبية لتصنيع وتركيب وصيانة ابراج التبريد المفتوحة

 

تصميم وتوريد وتركيب الشيللرات
design/production/maintance
chillers
ابراج التبريد المفتوحة
مجموعة تكنولاب البهاء جروب
المكتب الاستشارى العلمى
قطاع توريد خطوط انتاج المصانع
 
نحن طريقك لاختيار افضل خطوط الانتاج لمصنعكم
سابقة خبرتنا فى اختيار خطوط الانتاج لعملاؤنا
 
1)خطوط انتاج العصائر الطبيعية والمحفوظة والمربات
2)خطوط انتاج الزيوت الطبيعية والمحفوظة
3)خطوط انتاج اللبن الطبيعى والمحفوظ والمبستر والمجفف والبودرة
4)خطوط تعليب وتغليف الفاكهة والخضروات
5)خطوط انتاج المواسير البلاستيك والبى فى سى والبولى ايثيلين
6)خطوط انتاج التراى كالسيوم فوسفات والحبر الاسود
7)خطوط انتاج الاسفلت بانواعه
Coolمحطات معالجة الصرف الصناعى والصحى بالطرق البيولوجية والكيميائية
9)محطات معالجة وتنقية مياه الشرب
10)محطات ازالة ملوحة البحار لاستخدامها فى الشرب والرى
11)الغلايات وخطوط انتاج البخار الساخن المكثف
12)الشيللرات وابراج التبريد المفتوحة وخطوط انتاج البخار البارد المكثف
 
للاستعلام
مجموعة تكنولاب البهاء جروب
0117156569
0129834104
0163793775
 
القاهرة-شارع صلاح سالم-عمارات العبور-عمارة 17 ب
فلا تر رملية/كربونية/زلطيه/حديدية

وحدات سوفتنر لازالة عسر المياه

مواصفات مياه الشرب
Drinking water
acceptable
values

50

colour

acceptable

Taste

nil

Odour

6.5-9.2

ph

 

1 mg/dl

pb

5 mg/dl

as

50 mg/dl

cn

10 mg/dl

cd

0-100mg/dl

hg

8 mg/dl

f

45 mg/dl

N02

1 mg/dl

Fe

5 mg/dl

Mn

5.1 mg/dl

Cu

200 mg/dl

Ca

150 mg/dl

Mg

600 mg/dl

Cl

400 mg/dl

S04

200 mg/dl

Phenol

15 mg/dl

zn

 

 

الحدود المسموح به
ا لملوثات الصرف الصناعى
 بعد المعالجة
Acceptable
values
treated wate water
7-9.5

ph

25-37 c

Temp

40 mg/dl

Suspended solid

35 mg/dl

bod

3 mg/dl

Oil & grase

0.1 mg/dl

hg

0.02 mg/dl

cd

0.1 mg/dl

cn

0.5mg/dl

phenol

1.5 ds/m

conductivity

200 mg/dl

na

120 mg/dl

ca

56 mg/dl

mg

30 mg/dl

k

200 mg/dl

cl

150 mg/dl

S02

0.75 mg/dl

Fe

0.2 mg/dl

Zn

0.5 mg/dl

Cu

0.03 mg/dl

Ni

0.09 mg/dl

Cr

0.53 mg/dl

لb

0.15 mg/dl

pb

 





pipe flocculator+daf
plug flow flocculator
lamella settels

محطات تحلية مياه البحر بطريقة التقطير الومضى على مراحل
MSF+3.jpg (image)
محطات التقطير الومضى لتحلية مياه البحر2[MSF+3.jpg]
some of types of tanks we services
انواع الخزانات التى يتم تنظيفها
ASME Specification Tanks
Fuel Tanks
Storage Tanks
Custom Tanks
Plastic Tanks
Tank Cleaning Equipment
Double Wall Tanks
Septic Tanks
Water Storage Tanks
Fiberglass Reinforced Plastic Tanks
Stainless Steel Tanks
Custom / Septic
مراحل المعالجة الاولية والثانوية والمتقدمة للصرف الصناعى

صور مختلفة
من وحدات وخزانات معالجة الصرف الصناعى
 التى تم تصميمها وتركيبها من قبل المجموعة

صور
 من خزانات الترسيب الكيميائى والفيزيائى
 لوحدات معالجة الصرف الصناعى
المصممة من قبل المحموعة



technolab el-bahaa group


technolab el-bahaa group


technolab el-bahaa group

technolab el-bahaa group


technolab el-bahaa group


technolab el-bahaa group


technolab el-bahaa group


technolab el-bahaa group


technolab el-bahaa group


technolab el-bahaa group




مياه رادياتير اخضر اللون
بريستول تو ايه
انتاج شركة بريستول تو ايه - دمياط الجديدة
مجموعة تكنولاب البهاء جروب

اسطمبات عبوات منتجات شركة بريستول تو ايه-دمياط الجديدة

مياه رادياتير خضراء فوسفورية

من انتاج شركة بريستول تو ايه 

بترخيص من مجموعة تكنولاب البهاء جروب


زيت فرامل وباكم

DOT3



شاطر | 
 

 lملوثات مياه الشرب(اسبابها/اشكالها/اثترها على الانسان والحياة)

استعرض الموضوع السابق استعرض الموضوع التالي اذهب الى الأسفل 
كاتب الموضوعرسالة
Admin
Admin
avatar

عدد المساهمات : 3599
تاريخ التسجيل : 15/09/2009
العمر : 50
الموقع : مصر

مُساهمةموضوع: lملوثات مياه الشرب(اسبابها/اشكالها/اثترها على الانسان والحياة)   الإثنين مارس 05, 2012 4:09 am

Water Quality Symptom Search Engine

by
general.dr

bahaa badr

technolab el-bahaa group

----------------------------------------------------------------------------------------------------
Color

Blue/Green

View Contaminants matching this Specific Characteristic

Copper

MCLG

1.3 mg/L

MCL

1.3 mg/L (action level)

WQA Recommended Treatment Methods

Cation Exchange (20% - 90%)
Reverse Osmosis
Distillation
Electrodialysis
Corrosion control
Polyphosphate/Silicate feed

Potential Health Effects from Ingestion of Water

Gastrointestinal irritation

Sources of Contaminant in Drinking Water

Natural/industrial deposits
Wood preservatives
Plumbing
--------------------------------------------------------------------------------------------------
Dark brown/Black

View Contaminants matching this Specific Characteristic

Manganese (Total)

SMCL

0.05 mg/L

WQA Recommended Treatment Methods

Filtration (Oxidizing filters)
Cation Exchange
Oxidation/Precipitation/Filtration
Disinfection/Filtration

Effects on Water

Dark brown-black stains
Bitter, metallic taste

Sources of Contaminant in Drinking Water

Natural deposits
--------------------------------------------------------------------------------------------------
Reddish/Orange

View Contaminants matching this Specific Characteristic

Iron (Total)

SMCL

0.3 mg/L

WQA Recommended Treatment Methods

Filtration(oxidizing filters)
Cation Exchange
Oxidation/Precipitation/Filtration
Disinfection

Effects on Water

Rusty color
Sediment
Reddish or orange stains
Metallic taste

Sources of Contaminant in Drinking Water

Natural Deposits
--------------------------------------------------------------------------------------------------
Yellow or Brown Tea-Like

View Contaminants matching this Specific Characteristic

Color

SMCL

15 (color units)

WQA Recommended Treatment Methods

Anion Exchange
Activated Carbon
Filtration
Chlorination
Reverse Osmosis
Distillation
Ozonation

Effects on Water

Visible tint

Sources of Contaminant in Drinking Water

Tannins
Natural deposits
Iron
Copper
Manganese
--------------------------------------------------------------------------------------------------
Deposits

Soap scum, Bathtub rings

View Contaminants matching this Specific Characteristic

Hardness (as CaCO3)

SMCL

No federal limit
Soft: <17.1 mg/L
Slightly hard: 17.1 to 60 mg/L
Mod. hard: 60 to 120 mg/L
Hard: 120 to 180 mg/L
Very hard: >180 mg/L

WQA Recommended Treatment Methods

Remove all calcium and magnesium ions with a cation exchange water softener

Effects on Water

Consumes soap and makes cleaning more difficult
Whitish scale deposits
Soap curd and lime scum residue

Sources of Contaminant in Drinking Water

Natural deposits causing calcium(limestone) and magnesium salts in raw water
------------------------------------------------------------------------------------------------
Whitish scale

View Contaminants matching this Specific Characteristic

Total Dissolved Solids (TDS)

SMCL

500 mg/L

WQA Recommended Treatment Methods

Reverse Osmosis
Distillation
Deionization by Ion Exchange
Electrodialysis

Effects on Water

Hard water
Deposits on glasses and fixtures

Sources of Contaminant in Drinking Water

Natural deposits
Brackish water intrusion


Hardness (as CaCO3)

SMCL

No federal limit
Soft: <17.1 mg/L
Slightly hard: 17.1 to 60 mg/L
Mod. hard: 60 to 120 mg/L
Hard: 120 to 180 mg/L
Very hard: >180 mg/L

WQA Recommended Treatment Methods

Remove all calcium and magnesium ions with a cation exchange water softener

Effects on Water

Consumes soap and makes cleaning more difficult
Whitish scale deposits
Soap curd and lime scum residue

Sources of Contaminant in Drinking Water

Natural deposits causing calcium(limestone) and magnesium salts in raw water
------------------------------------------------------------------------------------------------
Smells

Like Bleach

View Contaminants matching this Specific Characteristic

Chlorine

MCLG

4 mg/L (P)*

MCL

4 mg/L (P)*

WQA Recommended Treatment Methods

Activated Carbon
Reverse Osmosis

Potential Health Effects from Ingestion of Water

Cancer

Sources of Contaminant in Drinking Water

Chemical added to disinfect municipal water
------------------------------------------------------------------------------------------------
Like Rotten Eggs

View Contaminants matching this Specific Characteristic

Odor

SMCL

3 (threshold odor number)

WQA Recommended Treatment Methods

Activated Carbon
Air Stripping
Oxidation/Filtration
Disinfection/Filtration

Effects on Water

Rotten egg
Musty
Garlic
Chemical smell

Sources of Contaminant in Drinking Water

Chlorine
Hydrogen sulfide
Organic matter
Gasoline contamination
Methane gas
Septic contamination
------------------------------------------------------------------------------------------------
Like Sewage

View Contaminants matching this Specific Characteristic

Odor

SMCL

3 (threshold odor number)

WQA Recommended Treatment Methods

Activated Carbon
Air Stripping
Oxidation/Filtration
Disinfection/Filtration

Effects on Water

Rotten egg
Musty
Garlic
Chemical smell

Sources of Contaminant in Drinking Water

Chlorine
Hydrogen sulfide
Organic matter
Gasoline contamination
Methane gas
Septic contamination
------------------------------------------------------------------------------------------------
Like Sweet Solvent

View Contaminants matching this Specific Characteristic

Methyl Tertiary-Butyl Ether (MTBE)

SMCL

No federal limit

WQA Recommended Treatment Methods

Activated Carbon
Air Stripping

Effects on Water

Sweet solvent odor at 0.020 mg/L
Possible human carcinogen

Sources of Contaminant in Drinking Water

"Oxygenator" additive for reformulated gasoline
------------------------------------------------------------------------------------------------
Xylenes (total)

MCLG

10 mg/L

MCL

10 mg/L

WQA Recommended Treatment Methods

Activated Carbon; Air Stripping

Potential Health Effects from Ingestion of Water

Liver, kidney, nervous system effects

Sources of Contaminant in Drinking Water

By-product of gasoline refining; paints, inks detergents

-----------------------------------------------------------------------------------------------=


عدل سابقا من قبل Admin في الإثنين مارس 05, 2012 4:43 am عدل 1 مرات
الرجوع الى أعلى الصفحة اذهب الى الأسفل
معاينة صفحة البيانات الشخصي للعضو http://technolabelbahaagp.googoolz.com
Admin
Admin
avatar

عدد المساهمات : 3599
تاريخ التسجيل : 15/09/2009
العمر : 50
الموقع : مصر

مُساهمةموضوع: lملوثات مياه الشرب(اسبابها/اشكالها/اثترها على الانسان والحياة)   الإثنين مارس 05, 2012 4:39 am

part 2

Spots

Glassware, dishes, flatware

View Contaminants matching this Specific Characteristic

Hardness (as CaCO3)

SMCL

No federal limit
Soft: <17.1 mg/L
Slightly hard: 17.1 to 60 mg/L
Mod. hard: 60 to 120 mg/L
Hard: 120 to 180 mg/L
Very hard: >180 mg/L

WQA Recommended Treatment Methods

Remove all calcium and magnesium ions with a cation exchange water softener

Effects on Water

Consumes soap and makes cleaning more difficult
Whitish scale deposits
Soap curd and lime scum residue

Sources of Contaminant in Drinking Water

Natural deposits causing calcium(limestone) and magnesium salts in raw water
---------------------------------------------------------------------------------------------------
Total Dissolved Solids (TDS)

SMCL

500 mg/L

WQA Recommended Treatment Methods

Reverse Osmosis
Distillation
Deionization by Ion Exchange
Electrodialysis

Effects on Water

Hard water
Deposits on glasses and fixtures

Sources of Contaminant in Drinking Water

Natural deposits
Brackish water intrusion
------------------------------------------------------------------------------------------------

My clothes

View Contaminants matching this Specific Characteristic

Hardness (as CaCO3)

SMCL

No federal limit
Soft: <17.1 mg/L
Slightly hard: 17.1 to 60 mg/L
Mod. hard: 60 to 120 mg/L
Hard: 120 to 180 mg/L
Very hard: >180 mg/L

WQA Recommended Treatment Methods

Remove all calcium and magnesium ions with a cation exchange water softener

Effects on Water

Consumes soap and makes cleaning more difficult
Whitish scale deposits
Soap curd and lime scum residue

Sources of Contaminant in Drinking Water

Natural deposits causing calcium(limestone) and magnesium salts in raw water

------------------------------------------------------------------------------------------------
Spotting and mottling of teeth

View Contaminants matching this Specific Characteristic

Fluoride

MCLG

4.0 mg/L

MCL

4.0 mg/L

WQA Recommended Treatment Methods

Activated Alumina
Bone Char
Reverse Osmosis
Distillation
Electrodialysis

Potential Health Effects from Ingestion of Water

Skeletal & dental fluorosis

Sources of Contaminant in Drinking Water

Natural deposits
Fertilizer
Aluminum industries
Water additive

-----------------------------------------------------------------------------------------------
Stains

Blue/Green

View Contaminants matching this Specific Characteristic

Copper

MCLG

1.3 mg/L

MCL

1.3 mg/L (action level)

WQA Recommended Treatment Methods

Cation Exchange (20% - 90%)
Reverse Osmosis
Distillation
Electrodialysis
Corrosion control
Polyphosphate/Silicate feed

Potential Health Effects from Ingestion of Water


Gastrointestinal irritation

Sources of Contaminant in Drinking Water

Natural/industrial deposits
Wood preservatives
Plumbing

----------------------------------------------------------------------------------------------
Brown/Red

View Contaminants matching this Specific Characteristic

Color

SMCL

15 (color units)

WQA Recommended Treatment Methodes
Anion Exchange
Activated Carbon
Filtration
Chlorination
Reverse Osmosis
Distillation
Ozonation

Effects on Water

Visible tint

Sources of Contaminant in Drinking Water

Tannins
Natural deposits
Iron
Copper
Manganese
---------------------------------------------------------------------------------------------

Iron (Total)

SMCL

0.3 mg/L

WQA Recommended Treatment Methods

Filtration(oxidizing filters)
Cation Exchange
Oxidation/Precipitation/Filtration
Disinfection

Effects on Water

Rusty color
Sediment
Reddish or orange stains
Metallic taste

Sources of Contaminant in Drinking Water

Natural Deposits

----------------------------------------------------------------------------------------------
Dark Brown/Black

View Contaminants matching this Specific Characteristic

Manganese (Total)

SMCL

0.05 mg/L

WQA Recommended Treatment Methods

Filtration (Oxidizing filters)
Cation Exchange
Oxidation/Precipitation/Filtration
Disinfection/Filtration

Effects on Water

Dark brown-black stains
Bitter, metallic taste

Sources of Contaminant in Drinking Water

Natural deposits
-----------------------------------------------------------------------------------------------
Grey

View Contaminants matching this Specific Characteristic

Aluminum

SMCL

0.05 to 0.2 mg/L on case-by-case basis

WQA Recommended Treatment Methods

Cation Exchange
Reverse Osmosis
Distillation
Ultrafiltration
Deionization

Effects on Water

Colored or tinted water

Sources of Contaminant in Drinking Water

Alum coagulation treatment
Natural deposits
-----------------------------------------------------------------------------------------------
Total Dissolved Solids (TDS)

SMCL

500 mg/L

WQA Recommended Treatment Methods

Reverse Osmosis
Distillation
Deionization by Ion Exchange
Electrodialysis

Effects on Water

Hard water
Deposits on glasses and fixtures

Sources of Contaminant in Drinking Water

Natural deposits
Brackish water intrusion

-----------------------------------------------------------------------------------------------
Red/Orange View Contaminants matching this Specific Characteristic


Iron (Total)

SMCL

0.3 mg/L

WQA Recommended Treatment Methods

Filtration(oxidizing filters)
Cation Exchange
Oxidation/Precipitation/Filtration
Disinfection

Effects on Water

Rusty color
Sediment
Reddish or orange stains
Metallic taste

Sources of Contaminant in Drinking Water


Natural Deposits
--------------------------------------------------------------------------------------------=
Tastes

Bitter

View Contaminants matching this Specific Characteristic

Alkalinity (as CaCO3)

SMCL

No federal limit
Low : <30 mg/L
High: >300 mg/L

WQA Recommended Treatment Methods

Raise: Soda Ash
Lower: White Vinegar, Citric Acid

Effects on Water

Low alkalinity waters tend to dissolve minerals and metals
High alkalinity waters tend to precipitate minerals and metals

Sources of Contaminant in Drinking Water

Presence of bicarbonates, carbonates, and hydroxides
----------------------------------------------------------------------------------------------
Sulfate

SMCL

250 mg/L

WQA Recommended Treatment Methods

Reverse Osmosis
Distillation
Anion Exchange
Electrodialysis

Effects on Water

Medicinal taste
Laxative effect

Sources of Contaminant in Drinking Water

Natural deposits

----------------------------------------------------------------------------------------------
Like Salt

View Contaminants matching this Specific Characteristic

Chloride

SMCL

250 mg/L

WQA Recommended Treatment Methods

Reverse Osmosis
Distillation
Anion Exchange
Electrodialysis
Deionization

Effects on Water

Salty taste

Sources of Contaminant in Drinking Water

Natural deposits
-----------------------------------------------------------------------------------------------
Metallic

View Contaminants matching this Specific Characteristic

Aluminum

SMCL

0.05 to 0.2 mg/L on case-by-case basis

WQA Recommended Treatment Methods

Cation Exchange
Reverse Osmosis
Distillation
Ultrafiltration
Deionization

Effects on Water

Colored or tinted water

Sources of Contaminant in Drinking Water

Alum coagulation treatment
Natural deposits
----------------------------------------------------------------------------------------------

Copper

MCLG


1.3 mg/L

MCL

1.3 mg/L (action level)

WQA Recommended Treatment Methods


Cation Exchange (20% - 90%)
Reverse Osmosis
Distillation
Electrodialysis
Corrosion control
Polyphosphate/Silicate feed

Potential Health Effects from Ingestion of Water

Gastrointestinal irritation

Sources of Contaminant in Drinking Water

Natural/industrial deposits
Wood preservatives
Plumbing
------------------------------------------------------------------------------------------------

Corrosivity

SMCL

Non-corrosive

WQA Recommended Treatment Methods

Calcite or Calcite/Magnesium Oxide
Soda Ash Chemical Feed
Polyphosphate Feed
Removal of Hydrogen Sulfide
Sodium Silicate Feed

Effects on Water

Metallic taste
Corrosion
Fixture staining
Leaking plumbing

Sources of Contaminant in Drinking Water

Very high or very low TDS
Dissolved gases in water, such as oxygen, carbon dioxide, and hydrogen sulfide
Low pH
---------------------------------------------------------------------------------------------

Iron (Total)

SMCL

0.3 mg/L

WQA Recommended Treatment Methods

Filtration(oxidizing filters)
Cation Exchange
Oxidation/Precipitation/Filtration
Disinfection

Effects on Water

Rusty color
Sediment
Reddish or orange stains
Metallic taste

Sources of Contaminant in Drinking Water


Natural Deposits
----------------------------------------------------------------------------------------------

Manganese (Total)

SMCL

0.05 mg/L

WQA Recommended Treatment Methods

Filtration (Oxidizing filters)
Cation Exchange
Oxidation/Precipitation/Filtration
Disinfection/Filtration

Effects on Water

Dark brown-black stains
Bitter, metallic taste

Sources of Contaminant in Drinking Water

Natural deposits
------------------------------------------------------------------------------------------------

Zinc

SMCL

5 mg/L

WQA Recommended Treatment Methods




Reverse Osmosis
Distillation
Cation Exchange
Electrodialysis

Effects on Water

Metallic taste

Sources of Contaminant in Drinking Water




Industrial wastes
Natural deposits
------------------------------------------------------------------------------------------------


Sour

View Contaminants matching this Specific Characteristic

pH

SMCL

6.5 - 8.5

WQA Recommended Treatment Methods

Increase by feeding soda ash
Decrease by feeding white vinegar or citric acid
Neutralizing filter (Calcite or Calcite/Magnesium

Effects on Water

Corrosive water

Sources of Contaminant in Drinking Water

High carbon dioxide
Natural balance of acid and alkalinity

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lملوثات مياه الشرب(اسبابها/اشكالها/اثترها على الانسان والحياة)
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صلاحيات هذا المنتدى:لاتستطيع الرد على المواضيع في هذا المنتدى
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