A pot experiment was conducted with three treatments (T1,295 ng g-1;T2,3 723 ng g-1;T3,6 109 ng g-1 in concentration of DDT) and one control (CK,31 ng g-1),When peanuts were mature whole peanut (Arachis hypogaea) plants were harvested and divided into four parts,roots,stems,husks and kernels.Concentrations of DDT in these parts were determined separately by GC ECD.Results show that the concentration of DDT in the kernels was about 200 ng g-1 in T2 and T3,exceeding the maximum residue limit for DDT residue (100 ng g-1) set by WHO/FAO.In general,the concentration of DDT in peanut ker nels is not likely to exceed the maximum residue limit in current environment,but the concentrat ions of DDT in the husks and stems,especially in the roots,of the plants were rather high,which causes more concerns.The total amount of ΣDDT in the roots was the highest,indicat ing the roots are the dominating part of the plant that takes up and accumulates DDT.Fairly high bioaccu mulation factors of the roots and the stems suggest the peanut plant is great in capacity of absorbing and accumulating DDT.Fur thermore,the results suggest that the high oil content in peanut kernels might facilitate the uptake and accumulat ion of lipophilic DDT.
魏峰,董元华,安琼,张桃林.花生对DDT的吸收积累[J].土壤学报,2007,44(5):907-912. DOI:10.11766/trxb200605230520 Wei Feng, Dong Yuanhua, An Qiong, Zhang Taolin. UPTAKE AND ACCUMULATION OF DDT BY PEANUT (ARACHIS HYPOGAEA)[J]. Acta Pedologica Sinica,2007,44(5):907-912.复制