[The effects of organic matter and hydrous metal oxides on the anaerobic degradation of gamma-666, p,p'-DDT in Liaohe River sediments].
Effects of organic matter and active Fe, Al, Mn oxides on the anaerobic degradation of gamma-666, p,p'-DDT were investigated by means of removing organic matter and hydrous metal oxides in Liaohe River sediments sequentially. The results showed that the anaerobic degradation of gamma-666, p,p'-DDT followed pseudo-first-order kinetics in different sediments; but, the extents and rates of degradation were different, even the other conditions remained same. Anaerobic degradation rates of gamma-666, p,p'-DDT were 0.020 d-1, 0.009 d-1 respectively for the sediments without additional carbon resources. However, with additional carbon resources, the anaerobic degradation rates of gamma-666, p,p'-DDT were 0.071 d-1 and 0.054 d-1 in the original sediments respectively. After removing organic matter, the rates were decreased to 0.047 d-1, 0.037 d-1. In the sediments removed organic matter and hydrous metal oxides, the rates were increased to 0.067 d-1, 0.059 d-1. This results indicated that organic matter in the sediments accelerated the anaerobic degradation of gamma-666, p,p'-DDT; the hydrous metal oxides inhibited the anaerobic degradation of gamma-666 and p,p'-DDT.
Zhao
Xu
X
School of Enviromental Science and Technology, Dalian University of Technology, Dalian 116012, China.
Quan
Xie
X
Zhao
Huimin
H
Chen
Shuo
S
Chen
Jingwen
J
Zhao
Yazhi
Y
D000537:Aluminum Oxide / Q000737:chemistry*; D000693:Anaerobiosis; D002681:China; D003634:DDT / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D005618:Fresh Water / Q000737:chemistry*; D007306:Insecticides / Q000737:chemistry*; D017895:Manganese Compounds / Q000737:chemistry*; D009930:Organic Chemicals; D010087:Oxides / Q000737:chemistry*; D014873:Water Pollutants / Q000032:analysis*
D005290:Ferric Compounds; D007306:Insecticides; D017895:Manganese Compounds; D009930:Organic Chemicals; D010087:Oxides; D014873:Water Pollutants; C000499:ferric oxide; C027424:manganese oxide; D003634:DDT; D000537:Aluminum Oxide