AMENDED STOCK PURCHASE AGREEMENT

THIS AMENDED STOCK PURCHASE AGREEMENT ("Amended Agreement") is
entered into this 7th day of October, 1997, and amends the Stock
Purchase Agreement ("Agreement") entered into on the 30th day of
June, 1997, by and between PERMA-FIX ENVIRONMENTAL SERVICES, INC.,
a Delaware corporation ("PESI"), and DR. LOUIS F. CENTOFANTI, an
individual ("Centofanti").

                          WITNESSETH:

     WHEREAS, Centofanti is the Chairman of the Board and President
of PESI; and

     WHEREAS, Centofanti and PESI have negotiated this Amended
Agreement in which Centofanti would acquire 12,190 shares of PESI
Common Stock for $20,000, which is an amendment to the original
purchase agreement which provided for the purchase of 24,381 shares
of PESI Common Stock for $40,000. The purchase will remain at
seventy-five percent (75%) of the closing bid price of each share
of PESI Common Stock as quoted on the NASDAQ on the original  date
of the Agreement (June 30, 1997); and

WHEREAS, the closing bid price of the PESI Common Stock was
$2.1875, as reported on the NASDAQ as of June 30, 1997; and 

WHEREAS, Centofanti desires to purchase Twelve Thousand One
Hundred Ninety (12,190) shares of PESI Common Stock, which is an
amendment to the original purchase agreement which provided for the
purchase of Twenty-Four Thousand Three Hundred Eighty One (24,381)
shares,  par value $.001 per share, and PESI desires to sell to
Centofanti such shares of Common Stock, upon the terms and
conditions set forth herein;

NOW, THEREFORE, in consideration of the mutual promises and
the respective covenants and agreements contained herein, the
parties hereto agree as follows:

     1.   Purchase and Sale.

               1.1  Purchase of Shares.  Subject to the terms and conditions
          of this Amended Agreement, Centofanti hereby purchases
          Twelve Thousand One Hundred Ninety (12,190) shares of
          PESI Common Stock (the "Shares"), and PESI hereby issues
          and delivers the Shares to Centofanti.

           1.2  Purchase Price;  Payment of Purchase Price. The per share
        purchase price of the Shares shall be $1.6406, calculated
        at seventy-five percent (75%) of $2.1875 (the closing bid
        price of the Common Stock on June 30, 1997, as reported
        on the National Association of Securities Dealers
        Automated Quotation System ("NASDAQ")). In consideration
        for the Shares, Centofanti hereby tenders to the Company
        Twenty Thousand Dollars ($20,000.00).

   2. Representations and Warranties of Centofanti. Centofanti
   represents and warrants as follows:

           2.1  Purchase for Investment.  Centofanti is acquiring, or
        will acquire, the Shares to hold for investment, with no
        present intention of dividing Centofanti's participation
        with others or reselling or otherwise participating,
        directly or indirectly, in a distribution thereof, and
        not with a view to or for sale in connection with any
        distribution thereof, except pursuant to a registration
        statement under the Securities Act of 1933, as amended
        (the "Securities Act"), and any applicable state
        securities laws, or a transaction exempt from registra-
        
        tion thereunder, and shall not make any sale, transfer or
        other disposition of the Shares in violation of any
        applicable state securities laws, including in each
        instance any applicable rules and regulations promulgated
        thereunder, or in violation of the Securities Act or the
        rules and regulations promulgated thereunder by the
        Securities and Exchange Commission (the "SEC").

           2.2  No Registration.  Centofanti acknowledges that the Shares
        are not being registered under any state securities laws,
        and are not being registered under the Securities Act on
        the ground that this transaction is exempt from
        registration under Section 3(b) and/or 4(2) of the
        Securities Act, and that reliance by PESI on such
        exemptions is predicated in part on Centofanti's
        representations set forth herein.

           2.3  Restricted Transfer.  Centofanti agrees that PESI may
        refuse to permit the sale, transfer or disposition of any
        of the Shares received by Centofanti unless there is in
        effect a registration statement under the Securities Act
        and any applicable state securities law covering such
        transfer or Centofanti furnishes an opinion of counsel or
        other evidence, reasonably satisfactory to counsel for
        PESI, to the effect that such registration is not
        required.

           2.4  Legend.  Centofanti understands and agrees that stop
        transfer instructions will be given to PESI's transfer
        agent and that there will be placed on the certificate or
        certificates for any of the Shares received by
        Centofanti, any substitutions therefor and any
        certificates for any additional shares which might be
        distributed with respect to such Shares, a legend stating
        in substance:

                     "The shares of stock evidenced by this
        certificate have been acquired for investment
        and have not been registered under the
        Securities Act of 1933, as amended (the
        "Securities Act"). These shares may not be
        sold or transferred except pursuant to an
        effective registration statement under the
        Securities Act and any applicable state
        securities laws unless there is furnished to
        the issuer an opinion of counsel or other
        evidence, reasonably satisfactory to the
        issuer's counsel, to the effect that such
        registration is not required."

           2.5  Indefinite Holding Period. Centofanti understands that
        under the Securities Act, the Shares received by
        Centofanti must be held indefinitely unless they are
        subsequently registered under the Securities Act or
        unless an exemption from such registration is available
        with respect to any proposed transfer or disposition of
        such shares.

           2.6  Rule 144 Compliance.  Centofanti understands that PESI is
        required to file periodic reports with the SEC and that
        certain sales of the Shares received by Centofanti may be
        exempt from registration under the Securities Act by
        virtue of Rule 144 promulgated by the SEC under the
        Securities Act, provided that such sales are made in
        accordance with all of the terms and conditions of that
        Rule including compliance with the required one-year
        holding period. Centofanti further understands that if
        Rule 144 is not available for sales of the Shares
        received by Centofanti, such Shares may not be sold
        without registration under the Securities Act or
        compliance with some other exemption from such
        registration, and that PESI has no obligation to register
        the Shares received by Centofanti or take any other
        action necessary in order to make compliance with an
        exemption from registration available.

           2.7  Sophisticated Investor.  Centofanti, as President and
        Chairman of the Board of PESI, possesses extensive
        knowledge as to the business and operation of PESI and
        has such knowledge and experience in financial and
        business matters that he is capable of evaluating the
        merits and risks of the acquisition of the Shares.

   3. Representations and Warranties of PESI.  PESI represents and
   warrants as follows:

           3.1  Organization and Standing.  PESI is a corporation duly
        organized, validly existing and in good standing under
        the laws of the State of Delaware.

           3.2  Power, Authority, and Validity.  PESI has full right,
        power and corporate authority to enter into this Amended
        Agreement and to perform the transactions contemplated
        hereby, and this Amended Agreement is valid and binding
        upon and enforceable against PESI in accordance with its
        terms. The execution, delivery and the performance of
        this Amended Agreement by PESI has been duly and validly
        authorized and approved by all requisite action on the
        part of PESI and Buyer.

           3.3  Status of PESI Common Stock.  The PESI Common Stock to be
        issued pursuant to this Amended Agreement, when so
        issued, will be duly and validly authorized and issued,
        fully paid and nonassessable.

   4. Miscellaneous.

           4.1  Notices.  All notices, requests, demands, and other
        communications under this Amended  Agreement shall be in
        writing and shall be deemed to have been duly given if
        delivered or mailed, first-class postage prepaid, to the
        following at the addresses indicated:

        To PESI:       Perma-Fix Environmental Services, Inc.
                       c/o Chief Financial Officer
                       1940 Northwest 67th Place
                       Gainesville, Florida 32653

        To Centofanti: Dr. Louis F. Centofanti
                       Perma-Fix Environmental Services, Inc.
                       6075 Roswell, Suite 602
                       Atlanta, Georgia 30328

        or to any other address that PESI or Centofanti shall
designate in writing.

           4.2  Brokers. Each party represents and warrants that all
        negotiations related to this Amended Agreement have been
        carried on by the parties without the intervention of any
        broker. Each party agrees to indemnify, and hold the
        other party harmless against any claims for fees or
        commissions employed or alleged to have been employed by
        such party.

           4.3  Amendment.  This Amended Agreement shall not be amended,
        altered or terminated except by a writing executed by
        each party.

           4.4  Governing Law.  This Amended Agreement shall be governed
        in all respects by the law of the State of Delaware.

           4.5  Headings.  The paragraph headings used in this Amended
        Agreement are included solely for convenience, and shall
        not in any way affect the meaning or interpretation of
        this Agreement.

           4.6  Entire Agreement.  This Amended Agreement sets forth the
        entire understanding of the parties; further, this
        Amended Agreement shall supersede and/or replace any oral
        or written agreements relating to this subject matter
        entered into by the parties before the date of this
        Amended Agreement.

           4.7  Binding Effect.  This Amended Agreement shall be binding
        on and inure to the benefit of, and be enforceable by,
        the respective heirs, legal representatives, successors,
        and assigns of the parties pursuant to its terms.

   PESI and Centofanti have executed this Amended Agreement as of
the 7th day of October, 1997.


                       PERMA-FIX ENVIRONMENTAL SERVICES, INC.
  
  
  
                    By:_______________________________________
                       RICHARD T. KELECY
                       Chief Financial Officer





                       __________________________________________
                       DR. LOUIS F. CENTOFANTI, Individually