EXHIBIT
32.1
CERTIFICATION
PURSUANT TO
18
U.S.C. SECTION 1350,
AS
ADOPTED PURSUANT TO SECTION 906
OF
THE SARBANES-OXLEY ACT OF 2002
In
connection with the Annual Report of Perma-Fix Environmental Services, Inc.
(“PESI”) on Form 10-K for the year ended December 31, 2007 as filed with the
Securities and Exchange Commission on the date hereof (the “Form 10-K”), I, Dr.
Louis F. Centofanti, Chief Executive Officer of the Company, certify, pursuant
to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of
2002, that:
(1)
The
Form 10-K fully complies with the requirements of Section 13(a) or 15(d)
of the
Securities Exchange Act of 1934 (15 U.S.C. §78m or §78o(d)); and
(2)
The
information contained in the Form 10-K fairly presents, in all material
respects, the financial condition and results of operations of the
Company.
Dated:
March 31, 2008
Dr.
Louis
F. Centofanti
President
and
Chief
Executive Officer
This
certification is furnished to the Securities and Exchange Commission solely
for
purpose of 18 U.S.C. §1350 subject to the knowledge standard contained therein,
and not for any other purpose.