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Toxics Use Reduction Institute · Surface Solutions Laboratory
 
Toxics Use Reduction Institute




Surface Solutions Laboratory

Trial Report



Trial Number 1

(Client Number 104, Project Number 1)

Trial Purpose: To compare surfactant levels

Date Run: 07/20/99

Experiment Procedure:
To compare surfactant levels of a cleaning solution before & after passing through separation equipment (Aqueous Recovery Resources, Inc., Suparator, oil-water separator) and a virgin sample of the solution.
Three titrations were per sample were tested for nonionic surfactant content using Bama Chem Nonionic Surfactant Kit. The general procedure is as follows:
1. ADD APPROXIMATELY 25 ML OF WATER TO MIXING VIAL
2. ADD 8 DROPS OF INDICATOR SOLUTION TO VIAL. COLOR SHOULD BE GREEN.
3. ADD 15 DROPS OF 20% SULFURIC ACID TO VIAL (20 DROPS IF STRONGLY ALKALINE DETERGENTS ARE TESTED) AND SWIRL. COLOR SHOULD NOW BE PURPLE. (CAUTION: HANDLE THIS SOLUTION WITH CARE. IT IS CORROSIVE AND MAY CAUSE BURNS.)
4. ADD 0.5ML OF NONIONIC DETERGENT SOLUTION TO VIAL AND SWIRL, COLOR SHOULD NOW TURN BACK TO GREEN OR YELLOW-GREEN.
5. ADD TITRATING SOLUTION DROPWISE WHILE COUNTING UNTIL THE COLOR CHANGES TO A WINE-RED OR PURPLE. (ABOUT HALFWAY TO THE ENDPOINT THE COLOR WILL BE TAN OR LIGHT BROWN). NOTE THE NUMBER OF DROPS NEEDED AND MULTIPLY BY 0.5 TO GET % BY VOLUME OF NONIONIC DETERGENT. EACH DROP IS EQUIVALENT TO 0.0028 GRAMS OF SURFACTANT.
CHOOSE SAMPLE SIZE THAT WILL REQUIRE 10-20 DROPS OF TITRANT FOR BETTER ACCURACY. FOR VERY CONCENTRATED SURFACTANT SOLUTIONS USE A 0.10ML SAMPLE SO AS TO CONSERVE REAGENTS. FOR A 0.10ML SAMPLE USE A FACTOR OF 2.5.
FOR WEAKER SOLUTIONS:
1.00ML SAMPLE USE A FACTOR OF 0.25
10.00ML SAMPLE USE A FACTOR OF 0.025
100.00ML SAMPLE USE A FACTOR OF 0.0025
SOME INTERFERENCES - ACID SOLUBLE ANIONIC DETERGENTS CATIONIC DETERGENTS SOME AMINES STRONG OXIDIZERS SUCH AS HYPOCHLORITES, NITRITES, ETC. HIGHLY CONCENTRATED DYES

The chemistries used were:
SITE CLEANER MFR PRODUCT Notes:
Racine Howard Supply Co LT-5-100 Soak Cleaner 10 oz/gal
Racine Howard Supply Co LT-5-100 Soak Cleaner Influent to Suparator
Racine Howard Supply Co LT-5-100 Soak Cleaner Effluent from Suparator

Trial Results
The solution appeared to have a vastly increased level of surfactant after passing through the oil-
water separator.  Table 1 list the values obtained for each stage of the cleaner.
Table 1.  Surfactant Levels            
Site:    Racine                        
            Cleaner            Influent      Effluent
                 8.33            13.33            46.67
               13.33            13.33            53.33
               13.33            16.67            43.33
Average  11.67            14.44            47.78

Table 2.  Data from each stage of solution
Client            EPA/Superator Chris UnderwoodClient Type            Consultant            
SCL #                     99-7104-02-5
Test Type               Nonionic            
Cleaner Mfr            Racine Cleaner
Product Name        LT-5-100 Soak Cleaner
Concentration Used   7.5            %
Drops Required            6            
Sample Size              1.5            mL
Wt of Surfactant        0.0168      grams
drop * f                      1            % by volume of nonionic surfactant
Dilution correction   13.33            
Total Surfactant      13.33            
Mfr            Racine Cleaner
Product            
Conc. %                  7.5            
Volume                   1.5            
Wt of Surf               0.0168    in Sample
% Surf.                    1            in Sample
Total Surf %          13.33      

Experimenter            Marshall            
Date                          7/20/99            
Client Type               Consultant            
SCL #                       99-7104-02-5
Test Type                 Nonionic            
Cleaner Mfr              Racine Influent
Product Name          LT-5-100 Soak Cleaner
Concentration Used      7.5            %
Drops Required            4            
Sample Size                 1            mL
Wt of Surfactant            0.0112  grams
drop * f                          1            % by volume of nonionic surfactant
Dilution correction       13.33            
Total Surfactant          13.33        Full strength
Mfr            Racine Influent
Product                   LT-5-100 Soak Cleaner
Conc. %                       7.5            
Volume                        1            
Wt of Surf                    0.0112            in Sample
% Surf.                        1            in Sample
Total Surf %              13.33            Full strength

Experimenter            Marshall            
Date                          7/20/99            
Client Type               Consultant            
SCL #                       99-7104-02-5
Test Type                 Nonionic            
Cleaner Mfr              Racine Influent
Product Name          LT-5-100 Soak Cleaner
Concentration Used      7.5            %
Drops Required            4            
Sample Size                 1            mL
Wt of Surfactant            0.0112  grams
drop * f                         1            % by volume of nonionic surfactant
Dilution correction       13.33            
Total Surfactant          13.33            
Mfr            Racine Influent
Product                     LT-5-100 Soak Cleaner
Conc. %                     7.5            
Volume                      1            
Wt of Surf                  0.0112     in Sample
% Surf.                      1              in Sample
Total Surf %            13.33         Full strength

Experimenter           Marshall            
Date                         7/20/99            
Client Type              Consultant            
SCL #                       99-7104-02-5
Test Type                 Nonionic            
Cleaner Mfr              Racine Influent
Product Name          LT-5-100 Soak Cleaner
Concentration Used  7.5            %
Drops Required        5            
Sample Size            1            mL
Wt of Surfactant       0.014    grams
drop * f                     1.25      % by volume of nonionic surfactant
Dilution correction    13.33            
Total Surfactant       16.67            
Mfr                           Racine Influent
Product                    LT-5-100 Soak Cleaner
Conc. %                   7.5            
Volume                    1            
Wt of Surf                0.014      in Sample
% Surf.                    1.25         in Sample
Total Surf %            16.67       Full strength

Experimenter            Marshall            
Date                          7/20/99            
Client Type              Consultant            
SCL #                      99-7104-02-5
Test Type                Nonionic            
Cleaner Mfr             Racine Effluent
Product Name         LT-5-100 Soak Cleaner
Concentration Used  7.5        %
Drops Required       16            
Sample Size            1            mL
Wt of Surfactant       0.0448   grams
drop * f                     4            % by volume of nonionic surfactant
Dilution correction   13.33            
Total Surfactant       53.33            
Mfr            Racine Effluent
Product                   LT-5-100 Soak Cleaner
Conc. %                   7.5            
Volume                    1            
Wt of Surf                0.0448     in Sample
% Surf.                    4              in Sample
Total Surf %            53.33       Full strength

Experimenter          Marshall            
Date                        7/20/99            
Client Type             Consultant            
SCL #                     99-7104-02-5
Test Type               Nonionic            
Cleaner Mfr            Racine Effluent
Product Name        LT-5-100 Soak Cleaner
Concentration Used   7.5            %
Drops Required        14            
Sample Size              1            mL
Wt of Surfactant        0.0392   grams
drop * f                      3.5         % by volume of nonionic surfactant
Dilution correction   13.33            
Total Surfactant      46.67            
Mfr            Racine Effluent
Product                   LT-5-100 Soak Cleaner
Conc. %                  7.5            
Volume                   1            
Wt of Surf               0.0392      in Sample
% Surf.                    3.5           in Sample
Total Surf %           46.67        Full strength

Experimenter          Marshall            
Date                        7/20/99            
Client Type             Consultant            
SCL #                     99-7104-02-5
Test Type               Nonionic            
Cleaner Mfr            Racine Effluent
Product Name        LT-5-100 Soak Cleaner
Concentration Used 7.5            %
Drops Required      13            
Sample Size            1            mL
Wt of Surfactant      0.0364    grams
drop * f                    3.25        % by volume of nonionic surfactant
Dilution correction   13.33            
Total Surfactant      43.33            
Mfr            Racine Effluent
Product                   LT-5-100 Soak Cleaner
Conc. %                  7.5            
Volume                   1            
Wt of Surf               0.0364      in Sample
% Surf.                   3.25          in Sample
Total Surf %         43.33          Full


Success Rating
A cleanliness study, addressing only various analytical techniques.

Conclusion
The concentration of surfactant in the cleaning solutions were not decreased by passing through the Superator Oil-Water separator.