河北、湖北、四川三省畜禽养殖场粪污样品中硒、钼含量的调查

目的 调查河北、湖北、四川三省畜禽养殖场粪污样品中硒、钼的含量。方法 采集河北、湖北、四川三省206个养殖场的422个样品, 干清粪和水泡粪样品经过65 ℃烘干至恒重后, 粉碎或研磨, 过0.25 mm样品筛, 进行微波消解处理后, 赶酸定容至50 mL容量瓶中, 用电感耦合等离子质谱仪对硒、钼元素进行测定。污水样直接进行微波消解处理后, 赶酸定容至50 mL容量瓶中, 用电感耦合等离子质谱仪对硒、钼元素进行测定。结果 3个省份的猪场、鸡场和牛场的干清粪样品中不同程度的检出了硒或钼的含量; 污水样品和水泡粪样品中均未检出硒和钼的含量。结论 河北、四川、湖北三省养猪场、养鸡场和养牛场的粪污再利用过程中可能会对环境造成一定的污染, 应当进行相应处理后再进行利用。

Investigation on selenium and molybdenum contents in manure samples of livestock and poultry farms in Hebei, Hubei and Sichuan provinces

Objective To investigate the contents of selenium and molybdenum in fecal pollution samples from livestock and poultry farms in Hebei, Hubei and Sichuan provinces. Methods Totally 422 samples from 206 farms in Hebei, Hubei and Sichuan provinces were collected. The dried manure and blisters were dried at 65 °C to constant weight, crushed or ground, passed through a 0.25 mm sample sieve, and subjected to microwave digestion. The acid was adjusted to a 50 mL volumetric flask, and the selenium and molybdenum elements were measured by an inductively coupled plasma mass spectrometery. After the sewage sample was directly subjected to microwave digestion treatment, the acid was adjusted to a 50 mL volumetric flask, and the selenium and molybdenum elements were measured by an inductively coupled plasma mass spectrometery. Result Selenium or molybdenum content was detected in different degrees of dry and dung samples from pig farms, chicken farms and cattle farms in three provinces. Selenium and molybdenum were not detected in both sewage samples and hydrous samples. Conclusion The recycling process of manure from pig farms, chicken farms and cattle farms in Hebei, Sichuan and Hubei provinces may cause some pollution to the environment, it should be treated accordingly before being used.