摘要
利用制革污泥堆肥后进行大田试验,对铬的化学行为进行了研究,为制革污泥再利用提供理论依据。研究表明,施肥时间距现在越近,铬的生物有效性越大。随着时间的延长,铬向深层的迁移则越明显。旱地土壤经10～20 a表层可逐渐恢复到自然水平。据试验结果, 提出旱地土壤施用污泥堆肥应控制铬含量加入土壤后要小于100 mg／kg,水田土壤应控制铬含量加入土壤后小于350 mg／kg。
In this experiment, the study on using the tannery sludge compost for the contrast experiments between field experiment and further study on chrome chemical action are also conducted in this experimenL All these offer the theoretical bases for reusing tannery sludge. The field experiment study shows that the nearer time of applying fertilizer is, the larger the biological effectiveness of chrome is. With the time prolonging, the chrome emigration to the further layer is very clear. After ten to twenty years, the surface of dry land soil will come to the natural level gradually. According to the experiment results, we think that the chrome coming into the dry land soil should be controlled within 100 mg · kg^-1while the chrome coming into paddy field soil should be controlled within 350mg·kg^-1
出处
《天津科技大学学报》
CAS
2005年第4期31-34,67,共5页
Journal of Tianjin University of Science & Technology
基金
天津科技大学自然科学基金资助项目(20040211)
关键词
铬
污泥
堆肥
可行性
chrome
sludge
compose
feasibility
