Hexachlorobenzene dechlorination as affected by nitrogen application in acidic paddy soil
Related Experiment Video
Updated: Jun 14, 2026

Analysis of Organochlorine Pesticides in a Soil Sample by a Modified QuEChERS Approach Using Ammonium Formate
Published on: January 20, 2023
Cuiying Liu1, Xin Jiang, Fang Wang
1State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, 71 East Beijing Road, Nanjing 210008, PR China.
Abstract:
Batch incubation experiments were conducted to study the effects of different nitrogen (N) fertilizers (NH(4)HCO(3), CO(NH(2))(2), and NaNO(3)) on hexachlorobenzene (HCB) dechlorination in an acidic paddy soil. Results showed that NH(4)HCO(3) and CO(NH(2))(2) had similar effects on HCB dechlorination, and their application amount was a crucial factor on reductive dechlorination. The addition of a proper amount of 0.14 g NH(4)HCO(3)- or CO(NH(2))(2)-N to 500 g soil promoted HCB dechlorination, however, the application of a high amount (0.84 g) of NH(4)HCO(3)- or CO(NH(2))(2)-N inhibited HCB dechlorination. Additional NaNO(3) served as an electron acceptor and led to lower soil pH, thus inhibited HCB dechlorination. Detected dechlorinated products showed that the dominant pathway of HCB dechlorination was HCB-->pentachlorobenzene (PeCB)-->1,2,3,5-tetrachlorobenzene (TeCB)-->1,3,5-trichlorobenzene (TCB), and PeCB was the main metabolite. The role of methanogenic bacteria in HCB dechlorination was uncertain and conditions-dependent.
More Related Videos
08:49Vegetated Treatment Systems for Removing Contaminants Associated with Surface Water Toxicity in Agriculture and Urban Runoff
Published on: May 15, 2017
08:05Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
Published on: October 7, 2020
Related Concept Videos
Microbial Bioremediation of Pesticides
Electrophilic Aromatic Substitution: Chlorination and Bromination of Benzene
Electrophilic Aromatic Substitution: Nitration of Benzene
Hydrolysis of Chlorobenzene to Phenol: Dow Process
Directing and Steric Effects in Disubstituted Benzene Derivatives
Reactions at the Benzylic Position: Halogenation