Measurement of Low Amounts of Metal Ions in Water and Waste Water Sewage Using the Method of Potentiometer Stripping

Document Type : Research Article


Department of chemistry,Faculty of science, Uiversity of Sistan and Baluchestan, Zahedan, I.R. IRAN


In sewages, various pollutants exist. So without refining, they should not return into life cycle. After refining, they result a mass of  digested sediments , containing organic materials such as humic acid, fulvic acid and minerals such as heavy metal ions can be washed out by hydrochloric acid 2M . Heavy metal ions are determined, identified, and quantified using the method of potentiometer stripping. In the present research, digested sediments of filter stations and drinking water of some french cities, namely Aix les-bans, Annecy, Montpellier and Chambery were analyzed. Low amounts of heavy metal ions were measured by this technique with higer sensitivty and proper accuracy. Detection limit of Cu+2 was determined 3.2´10-8 M at optimal time of electrolysis 32 minutes. The amount of Cu+2 in digested sediments of filter station of Montpellier city was 5.2 mmol/kg dry materials and its amount in drinking water of this city was estimated as 2.82 ppb. Capacity of cationic exchange of these humic acid containing sediments was determined by method of potentiometer titration in addition to batch method. It was known that the sites of sampling were very different, despite being located in a single region.


Main Subjects

[1] Masschelein W.J., Genot J., La Boue en that Que Facteur de Concetration et de Fixation Des Polluants, Trib Cebedeau, 34 (450), p. 245 (1981(.
[2] علیپور تراب، شیرین؛ حذف کادمیوم از پساب­های کشاورزی با استفاده از باگاس نیشکر، نشریه شیمی و مهندسی شیمی ایران، (2)29، ص. 99 (1389)
[3] Bard A.J., Faulkner L.R., "Electrochemical Methods Fundamentals and Applications", 2nd ed., John and Sons Inc,ch.11, pp. 458-464(1991)  .
[4] Jagner D., Graneli A., Potentiometric Strpping Analysis, Anal. Chim. Acta , 83, p.19 (1976).
[5] Estela J.M.,Tomas C.,Cladera A., Cerda V., Potentiometric Stripping Analysis:A Review, Critical Review in Analytical Chemistry, 25(2), p. 91 (1995).
[6] Jagner D., Aren K., Potentiometric Strpping Analysis for Zinc, Cadmium, Lead and Cooper in Sea Water, Analytica chimica Acta, 107, p. 29 (1979).
[7] Jagner D., Computerised Flow Potentiometric Strpping Analysis, Trends  in Anal Chem., 2 (3), p. 53 (1983).
[8] Rumeau M., "Dosage Des Metaux Lourds Dans Les Boues D'epuration Par Chronopotentionmetrie", Congres Barcolne (1981).
[9] Bouzanne M., Dosage de Micropollants Mineraux Des Eau (Cu,Pb,Cd,Zn) Par Voltamperometrie de Redissolution Anodique Impulsionnele Electrode Tournante a Film de Mercure, Analusis , 9( 10), p. 461 (1981).
[10] Hocevar Samo. B., wang J., Deo R.P., Ogorevc B., Potentiometric Strpping Analysis at Bismuth-Film Electrode, Electroanalysis, 14(2) ,p. 112 (2002).
[11] Kappes Thomas., Hauser Peter. C., Potentiometric Detection of Alkali, Anal. Chem, 70, p.482 (1982).
[12] Moller U., Acquired Experiences from Suldge Treatment, Trib Cebedeau, 34 (451), p. 241 (1981)  .
[13] Sardachti A., Aptitude A.L, Echange D., "Ions Des Boues des Stations d¢epuration, These de 3eme Cycle", Grenoble, France (1984).
[14] Wang J., "Stripping Analysis Principles", VCH Pubishers Deerfield Beach. F 34, pp. 291-309(1985).
[15]Sardashti A., Mohammadian.moghadam  S., Determination of Cationic Exchange Capacity of Extracted Humic acid from Naharkhoran Forest Gorgan,s Soil for the pb+2,Cd+2 and Ni+2  by Using Batch Method, Journal of Irannain Chemical Society, 26(3), p. 9 (2007).