Document zogYrw25Q1VeJG46kkKaYGknR

AR226-2647 37 Z-47 REV 6-82 <^M> ESTtBl.lRrl& 1603 E. 1. DU PONT DE NEMOURS &: COMPANY INCORPORATED P.O. Box 1217 PARKERSBUHG. W. VA. Z6102 POLYMER PRODUCTS DEPARTMENT AR226-2647 cc: D. M. von Schriltz-Wilm. i3. E. Crum 0. R. Lawson A. C. Sobrero W. M. Stewart July 14, 1992 TO: FROM: Ric Brandenburg - Dordrecht Jern Oik - Dordrecht Kazu Yokoyama - MDF Mike McClusky - WW Rob McElhany - REOP Harry Heath - Chambers Works 44160 Bart Ruiter - Louviers James C. Moore Spruance Fabiola Sepulveda - D12032-1 N. Marinir - Chambers Uorks 76815 Everett I. Baucom - Fayetteville Roge^ J. ^f4^Hashington Works 'ADS6RPT10N OF AMMONIUM PERFLUOROQCTANATEOH .CARBON 'W; Attached is a report of Calgon Carbon's adsorption isotherm test work for aminonium perfluorooctanate (C-8) on carbon. We at Washington Works ;-,,; are planning to use carbon adsorption as the technology to remove C-8 from our l. waste water. RJZ:sa1 Attachment BETTER THINGS FOR BETTER LIVING BOD000393 EID563366 CALGON CARBON CORPORATION P.O. BOX 717 PITTSBURGH, PA 15230-0717 (412) 787-6700 TWX:fc7l 1837CCCPGH FAX: 412/787-6676 412/787-6813 June 29, 1992 Roger J. Zipfel DuPont Polymers P. 0. Box 1217 Parkersburg, WV 26102 Dear Roger, I would like to first thank you for the time that you spent with me on Wednesday discussing the C-8 removal project. The information you provide will be valuable in making our system recommendation. Please find attached a copy of the Isotherm Report prepared by our Research and Development staff. If you have any questions concerning the data or results interpretation, please do not hesitate to call me. I have also asked Dr. Greenbank to give you a call to discuss the PAC vs. GAC issue we were discussing. Thanks again and I will be in contact with you within a week to discuss our process recommendations. Very truly yours, CALGON CARBON CORPORATION JMH/mls:3186 Attachment - ^ . K'^<- J. Michael HaveIRa Technical Sales Representative BOD000394 EID563367 CONFIDENTIAL CALGON CARBON CORPORATION Wastewater Technical Service Report Adsorption Isotherm Testing for Removal of Ammonium Perfluoro Octanate from Industrial Wastewater Prepared for: Roger J. Zipfel DuPont Polymers Parkersburg, WV BOD000395 EID563368 Vastevater Technical Service No. 0692-09 Page 2 Executive Summary DuPont has an industrial vastevater that is contaminated with four fluorotensides (Cg, ammonium perfluoro octanate). The contaminant is a commonly used surlactant in their teflon plant and other DuPont plants. They are required to remove the contaminant by the end of the year. The problem is believed to be a toxicity related issue. A request was made for Calgon Carbon Corporation to conduct feasibility testing with the use of activated carbon to remove the (Cp) surfactant. No specific treatment objective was listed in the request; however, 99 percent removal or non-detectable limits of surfactant was mentioned in a preliminary discussion of the project. The industrial vastevater, as received, was water white in color and had some white suspended solids. Raw Characterization is shown in Tablfi"'I. Glass fiber filtration removed the solids and the filtrate was water white-and<-cl ear. An eleven point isotherm was conducted on the contaminated water using saerviee carbon. The results of the isotherm show the service carbon would remove 99.9 percent of the ammonium perfluoro octanate (Cn) from the wastewater. The isotherm curve shows a one phase plot with an estimated equilibrium capacity of II 224 mg/g. The theoretical carbon use rate at equilibrium was calculated at 3.5 lbs/1000 gallons. Refer to Table and Figure I. Recommendations The sample received for laboratory testing contained white suspended solids; therefore, filtration was required prior to isotherm testing. It,As recommended that it may be necessary to investigate solids 'ESeiaoaEal'prior to a full scale adsorption system. Also, the isotherm data only deifeeaaaaies the theoretical carbon use rate based on the equilibrium capacity and<-should not be used for design purposes. &s BOD000396 EID563369 Hastewater Technical Service No. 0692-09 Page 3 Introduction DuPont used surfactants mainly in their teflon and other plant processes. Their industrial wastewater is contaminated with surfactants (four fluorotensides - Cn ammonium perfluoro octanate). The surfactant contamination may be a toxicity related problem, which needs to be cleaned up by the end of the year. An isotherm was conducted using service carbon to determine the feasibility of removing the contaminants. Procedure A. Sample '^w The industrial wastevater was collected by the customer and shipped to Calgon Carbon Corporation. One 6.5 gallon glass carboy of the contaminated water was received Hay 5, 1992. The sample was stored in the refrigerator <4) upon receipt. The sample appeared water white with white suspended ,i.i solids settled at the bottom of the container. ">s B. Activated Carbon III. The isotherm was conducted using service carbon, i.e., activated carbon that had been reactivated. The carbon was water washed, oven dried, iand -r,. pulverized to 95% minus 325 mesh prior to isotherm testing, 't tail i..< Characterization data of the carbon are shown in Table ;te oi .; - C. Filtration The raw wastewater was vacuum filtered through Vhatman 934-A11, 11 centimeter glass fiber filter paper. The filtrate was water white and clear. D. Adsorption Isotherm Testing An eleven point isotherm was conducted on the industrial wastewater. The varying dosages were weighed out (Control, 0.01, to 10.0 grams) and each dose was added to one liter of filtered wastewater. The dosages were conducted in one liter Erienmeyer flasks. The carbon/liquid slurries were stirred with the use of magnetic stirring apparatus. The solutions were allowed to stir for 24 hours, then filtered through 0.45 micron millipore pads to remove the carbon. E. Analytical The pH, suspended solids, and conductivity were determined using methods described in "Standard Methods for Examination of Water and Wastewater", current edition. Eighteen hundred milliiiters of each filtered dosage were sent to CE^M Hill Analytical Laboratories for analyses of the surfactant (Cg). BOD000397 EID563370 Wastewater Technical Service No. 0692-09 Page 4 Discussion II Characterization of the raw vastewater is shown in Table I. The data shov 100 mg/L of the surfactant. The equilibrium capacity was calculated at 224 mg/g and the corresponding theoretical carbon use rate was estimated at 3.5 lbs/1000 gallons. The isotherm data and curve are shown in Table and Figure I, respectively. BOD000398 EID563371 Table I DuPont Parkersburg, WV - TSR So. 0692-09 Characterization of Rav Vastevater Analysis pH Suspended Solids Conductivity Ammonium Perfluoro Octanate (Cg) Concentration mg/L 3.2 94 ^0 umhos/cm 100 BOD000399 EID563372 Table II DuPont Parkersburg, W - TSR Ho. 0692-09 Adsorption Isotherm Report Parameters Lab No. C54242 Sample Volume Agitation Time Temperature Pretreatment Sample Point Contaminant Raw (Cn) Analysis 1 Liter 24 hours Ambient Glass Fiber Filtered FEP Vet Finishing Recycle Water Ammonium Perfluro Octanate (Cg) 100 mg/L Dosage Grams Carbon (M) Control 0.01 0.025 0.05 0.1 0.25 0.5 1.0 2.5 5.0 10.0 Remaining mg/L 93.0 93.0 88.0 84.0 71.0 37.0 8.4 0.4 <0.1 <0.1 <0.1 (C) mg 93.0 93.0 88.0 84.0 71.0 37.0 8.4 0.4 ---- ---- ' mg Adsorbed (X) --.--- - 5.0 9.0 22.0 56.0 84.6 92.6 ---- ---- "" Carbon Loading (X/M) -- 2--00-- 180 220 224 169.2 92.6 ---- .-..-- Comments! M C = 224 mg/g Theoretical Carbon Use Rate Equilibrium =3.5 lbs/1000 gallons BOD000400 EID563373 Table III DuPont Parkersburg, W - TSR No. 0692-09 Activated Carbon Characterization Data Material Test A.D. (G/CC) Screen, % On -40 Moisture % (As Packed) Ash % Iodine No. Service Carbon Specification Minimum Maximum 0.60 5 2 9 750 BOD000401 EID563374 ADSORPTION ISOTHERM FOR THE REM OF AMMONIUM PERFLUORO OCTAN 1000 FIGURE CALGON CARBON CORPORATION / - TECHNICAL SUPPORT REQUEST TSR s J^^ c- BOD000403 EID563376 TSRNO.. ISOTHERM TEST REQUEST Customer Name: ____QufoyA.- u>a.^lr>vnqt,oft qicn-Ks Location: ^Off^g^sbUrg^W^ Application Engineer _____S.>cK Sa^de^s Salesperson: --------T^S^HfiMF^. 1. Process or System Description (provide as much detail as possible -- attach pages, if necessary): 1. Application Area: Groundwater,______________Wastewater_____y.------------Process-------------- > 2. Description of the Customer's Process or Stream: . ^ , ,^,, Se.6. a^-'to-c^ed co.^ cefcr't' 3. Stream Compos'tion (detail all components, concentrations, (Attach MSDS), etc.): ,i.^; Se oAo-c^ed co-U Tepor-t ,,, .A.tr/ y- ^.w'y^.f^ . , 4. Does the Sample contain wlatiles? yes/no. If yes, special sampling proc^dft^ghW1!^13-^"'1"^0- 5. Sample Storage R^ii-fAirx.,-.^- Amblent/Refrigerat^'Other-___________________ ^ligl?' 11. I, Sample Propertiesf'pH ___S-^-SL-.. ...... TOC _________.^.r.^daetiyity _ Suspended'SBlidP2_________ Color __________ Other kapigyagioperties 2. Pretreatment Requirements _____________________^i'""";^ '";. ''"-^"-r- 3. Test Conditions A, Temperature ^JOSS^e-w^_____________________--..-^ ...,,,,..: B. Carbon____ 'Saof^c C. pH_____.. 3-3>5 4, .'."onltoring P- -.. 01 & Detection Level &. TOC B. Color Method _________ _____Method: C. Specific Organic _____List: Cy (."to oe. yiergpr y.ed, \pij C.U^yaL__^vBY D. Other ____. Ust:______________________________ 5. Special Samp'ing and/or Handling Requirements A. Volume for return __________,_____ ml 6. Zero Headspacs C Inert Headspace 328-F . BOD000404 EID563377