Effect of two grass species on nutrient and Zn release from sewage sludge covering mine tailings
Sewage sludge can be used as cover material on mine railings, to protect waste from weathering, and to promote establishment of vegetation. Plants are thought to prevent leakage of nutrients and metals from sludge. The aim of this study was to determine what effect two grass species Phalaris arundinacea L. and Poa annua L. have on nutrient and Zn content in the pore water of sewage sludge. This was investigated in a field study. In the spring, levels of NO3-N and NH4-N were lower in samples from plots with P. annua compared to those from plots with P. arundinacea. Levels of PO4-P were not affected by any of the grasses. In samples taken in the autumn, Zn concentrations were lowered by cultivation of P. annua. During the summer, mineralization had taken place, resulting in significantly increased NO3- levels, decreased NH4-levels, and decreased pH. The conclusion was that the annual grass P. annua had a greater preventive effect on nutrient and Zn release from sewage sludge as compared to P. arundinacea or to leaving the area without vegetation.
Phalaris arundinacea Poa annua soil moisture sampler Zn
C. Neuschutz M. Greger
Department of Botany, Stockholm University, S-106 91 Stockholm Sweden
国际会议
第九届痕量元素生物地球化学国际会议(9th International Conference on the Biogeochemistry of Trace Elements)
北京
英文
706-707
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）