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283.
广州市污泥垃圾农用资源化的初步研究 总被引:10,自引:0,他引:10
把污泥和垃圾配成有机复肥及培养土基质,对稻、生菜进行肥效试验及重金属含量检测。结果表明,若措施得当,污泥垃圾有较高的增产效果而重金属不致超标。并讨论了影响作物重金属含量的因素并就污泥垃圾作农用资源提出建议。 相似文献
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从农药厂阿特拉津生产车间污泥中分离出菌种AT菌,进行了系列降解实验。不同温度的降解实验表明,在4~20℃的实验温度范围内,AT菌能够降解代谢污染质,并随温度的升高,降解能力增强。20℃时降解率为38.84%;AT菌在外加氮源、碳源及以阿特拉津为惟一碳源和氮源等条件时对农药污染质阿特拉津均具有降解能力,且在以阿特拉津为惟一氮源(外加碳源)条件下的降解效果最好,此时的降解率为30.39%。 相似文献
286.
Kati P. Hakala Markku J. Yli-Halla Päivi M. Tuomainen Helinä Hartikainen 《Journal of environmental science and health. Part. B》2020,55(6):539-549
AbstractFluazinam, a widely used pesticide in conventional potato cultivation, is effective against epidemics of the fungal disease late blight. To assess fluazinam persistence in soil, laboratory experiments were conducted with fluazinam added to soil as a pure chemical or contained in the commercial product Shirlan®. In a follow-up experiment, the persistence was monitored under constant temperature and water content conditions during a maximum period of 1?year. In an annual climatic rotation experiment, fluazinam added to soil was exposed to the year-round temperature and water content conditions occurring in the boreal zone. A third experiment was undertaken to clarify the effect of soil organic matter (SOM) on the recovery of fluazinam. In the follow-up and annual climatic rotation experiments, more than half of the added fluazinam was recovered after 1?year of incubation. The estimated half-life of fluazinam ranged between 355 and 833?days. The degradation of fluazinam was enhanced by an abundance of SOM, a warm temperature, and wetness. Additionally, in over half of soil samples collected from fields where potato had been intensively cultivated for many years, varying concentrations of fluazinam were detected. Fluazinam can carry over to the next growing season in professional potato production. 相似文献
287.
离子色谱法同时测定柠檬酸发酵液中无机阴离子和有机酸 总被引:4,自引:0,他引:4
本文建立了以NaOH为淋洗液,甲醇为有机改进剂,阴离子交换分离,化学抑制型电导检测,快速测定柠檬酸发酵液中有机酸和SO^2-4,PL^3-4的离子色谱新方法,方法简单,灵敏,用于样品分析,结果令人满意。 相似文献
288.
中 低水平放射性废水的处理 总被引:2,自引:0,他引:2
介绍了利用钷-147模拟废水调试中、低放废水处理系统的实验情况。调试结果表明,整套系统能有效地去除废水中的放射性核素。其总净化系数为10~2~10~4。 相似文献
289.
L. Dalprà G. Nocera M. G. Tibiletti E. Martinoli A. Oldrini S. Agosti P. G. Crosignani 《黑龙江环境通报》1993,13(4):239-246
Cytogenetic data about 145 chorionic villus samples obtained between the 13th and 35th week of gestation are reported. ‘Late’ chorionic villus sampling (CVS) was used to resolve different situations: failed amniotic fluid cell cultures (5 cases); confirmation of an abnormal karyo-type, previously diagnosed as mosaic (14 cases); and ultrasound fetal malformation (23 cases). Most of the samples (103 cases) were analysed for the classical indications and in these cases, the principal aim was to obtain a rapid fetal karyotype. Excluding the cases used to check fetal karyotype, a chromosomal aberration was found in 11 out of 131 biopsies. In four cases of the group in which the fetal karyotype was checked (14 cases), the pathology observed at the first diagnosis was confirmed, while in the remaining ten cases the anomaly was not observed. 相似文献
290.