Recent content by Jeffrop

Dear Kenvlach, I will check Ca+2, Mg+2, in our waste, repead the experience as you did and will let you know. Regards

Dear Steve Could you give me the telephone number and/or email address of your company, We will get in touch with you. Thanks

Dear bimr Here is the answer your question: 1- Lime was using to raise the pH. 2- Yes all samples were filtered before go to an other stage. 3- Polymer cationic was using, this polymer done good result with waste sample no EDTA. 4- No, calcium chloride was not using in our test. 5- Not yet...

Dear Kenvlack, Bimr and ChrisDerrick The EDTA waste treatability test was done with two stages precipitations, here is the result, 1- Reference test: One organic waste water sample (no EDTA) was treated by hydroxide precipitation at pH 9.6, using cationic polymer . * The heavy metals before...

Gentlemen, Thanks for your help, I will try its and let you know the result ! Have a good day !

Hi everyone, The piping of our heat exchanger in 316 SS (1") was blocking by the deposit of Fe2O3 (solid) inside the pipe. Does any expert can suggest me a product to remove by dissolve the Ferro oxide (Fe2O3) and clean up the heat exchanger. Thanks

Thanks kenvlach ! Jeffrop

Hi Bimr Tks for your recommandation ! Jeffrop

Hi every body It's will very appreciate if somme one can tell me the solubility of Ferro oxide (Fe2O3) in water acid to basic (pH from 1 to 14) Many thanks

Dear Kenvlack, Bimr and ChrisDerrick, Thanks you for your interesting our subject and your suggestions ! Yes, we try with sulfide (Na2S) but did not work (sulfide only, not combine hydroxide/sulfide), after precipitation and sludge separation, we still have Ni in water ! We also try using...

Hi ChrisDerrick, Thanks for your feedback, the EDTA-Ni complexe waste generating by the plating line. The concentration of other metal (Fe, Cr, Zn ..) is low (less than 10 ppm). We already try with suffite but did not work, Ni is still presente after precipitation. We will try with Sodium...

Dear bimr, Thanks you for the information, we will look it carefully ! Regards ! Jeff

Hi bimr, Thanks for your suggestion ! Could you pls sent me more information about the preciptation of Sulfide with heavy metal complex with EDTA and Sulfex process. Regards Jeff

We want to precipitate the nickel ion from complex EDTA-nickel by hydroxide (OH from lime) but did not work ! The EDTA-Ni is so stable, Ni ion can not form a complex with OH to be precipitate ! !. We try to break down the EDTA-Ni complex before precipitate by oxidation (HNO3/H2O2...

We want to precipitate the nickel ion from complex EDTA-nickel by hydroxide (OH from lime) but did not work ! The EDTA-Ni is so stable, Ni ion can not form a complex with OH to be precipitate ! !. We try to break down the EDTA-Ni complex before precipitate by oxidation (HNO3/H2O2...