Mansour M, Scheunert I, Viswanathan R, Korte F
IARC Sci Publ. 1986(77):53-9.
Various degradation tests were carried out to assess the persistence of hexachlorobenzene (HCB) in the ecosphere. HCB was irradiated with light of various wave-lengths in organic solvents and in water, partly after addition of H2O2 or metal oxides. Photolysis to various dehalogenated products occurred at different rates, depending on concentration and irradiation time; HCB adsorbed on a silica gel was mineralized by light to CO2. A negligible amount of 14C-labelled HCB was mineralized to 14CO2 in various biodegradation tests. In an outdoor lysimeter experiment, 14C residues were found in all parts of wheat plants grown from seeds treated with 14C-HCB. Besides the parent compound and bound residues in plants and soil, very small amounts of soluble polar metabolites were present in the plants; the main product of this group, isolated from roots, was conjugated pentachlorothiophenol. Wheat grown in soil with 14C-HCB residues contained unchanged HCB and bound residues.
进行了各种降解试验，以评估六氯苯（HCB）在生态圈中的持久性。在有机溶剂和水中，部分是在添加过氧化氢或金属氧化物后，用各种波长的光照射六氯苯。光解成各种脱卤产物的速率不同，这取决于浓度和照射时间；吸附在硅胶上的六氯苯被光矿化为二氧化碳。在各种生物降解试验中，极少量的14C标记六氯苯被矿化为14CO2。在室外蒸渗仪实验中，在用14C-HCB处理过的种子培育出的小麦植株的各个部位都发现了14C残留。除了植物和土壤中的母体化合物和结合残留外，植物中还存在极少量的可溶性极性代谢物；从根部分离出的该类主要产物是共轭五氯硫酚。在含有14C-HCB残留的土壤中生长的小麦含有未变化的六氯苯和结合残留。
