Lead and chromium as limiting factors in recycling textile industrial sludge as an amendment in crop production
Textile and dyeing industry is one of the leading industries in Tamilnadu state of India. The coagulant process followed for treating the wastewater generated from this industry leads to sludge accumulation with a production of daily average of 10 tonnes in each Common Effluent Treatment Plant (CETP). As the sludge contained 17.2 per cent of Ca, its ameliorative potential as an amendment alternate to gypsum was assessed in a pot experiment with groundnut (Arachis hypogea) as a test crop. However, the sludge also contained high content of Pb (95.2mg· kg<-1>) and Cr (89.5 mg·kg<-1>) and hence their accumulation pattern in both plant and soil was also assessed. Unlike Cr, there was no DTPA extractable Pb detected in soil. Surprisingly, there was no decrease in the total extractable Pb, in spite of increased uptake of Pb with increase in the levels of applied sludge. The uptake of nutrients in different parts of crop indicated a general trend of highest uptake in haulms. The uptake of Cr was least in kernel and also low content compared to that of Pb. Though the content of Pb and Cr in the edible part namely kernel is low on comparison with haulm, yet the content itself is a concern when health hazards are considered.
Amendment chromium groundnut heavy metals lead textile sludge
P. Thangavel C. Dhanabalan S. Avudainayagam N. Chandrasekaran
Department of Environmental Science Department of Soil Science and Agricultural Chemistry, Tamil Nadu Agricultural University (TNAU), Co
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
997-998
2007-07-15（万方平台首次上网日期，不代表论文的发表时间）