Das Manab, Maiti Subodh Kumar
Department of Environmental Science and Engineering, Indian School of Mines University, Dhanbad, Jharkhand, India.
Int J Phytoremediation. 2009 Oct-Dec;11(8):651-63. doi: 10.1080/15226510802568547.
The Rakha Cu mines are located at East Singhbhum, Jharkhand, India and their activities ceased in 2001. The tailings (residue) were permanently stored in tailings ponds that require vegetation to reduce their impact on the environment. A pot scale study was conducted to evaluate the suitability of Cymbopogon citratus (DC.) Ex Nees and Vetiveria zizanioides (L) Nash for the reclamation of Cu tailings and to evaluate the effects of chicken manure and soil-manure mixtures on the revegetation of such tailings. Application of manure and soil-manure mixtures resulted in significant increase in pH, EC, OC, CEC and nutritional status of Cu tailings. The environmentally available and DTPA extractable Cu and Ni concentration reduced in amended tailings, while Mn and Zn content increased significantly. Plants grown on amended tailings accumulated lesser Cu and Ni but higher Mn and Zn. Plant biomass increased proportionally to manure and soil-manure mixtures application rates. Lemon grass produced more biomass than vetiver grass in either of the amended tailings. From the pot experiment, it can be suggested that application of chicken manure @ 5% (w/w) and in combination with lemon grass, could be a viable option for reclamation (phytostabilization) of toxic tailings.
拉卡铜矿位于印度贾坎德邦东辛格布姆，其开采活动于2001年停止。尾矿（残渣）被永久性地储存在尾矿池中，需要通过植被来减少其对环境的影响。开展了一项盆栽规模研究，以评估柠檬草（Cymbopogon citratus (DC.) Ex Nees）和香根草（Vetiveria zizanioides (L) Nash）对铜尾矿复垦的适用性，并评估鸡粪和土壤 - 粪肥混合物对这类尾矿植被恢复的影响。施用粪肥和土壤 - 粪肥混合物导致铜尾矿的pH值、电导率、有机碳、阳离子交换量和营养状况显著增加。改良尾矿中环境有效态和DTPA可提取态的铜和镍浓度降低，而锰和锌含量显著增加。在改良尾矿上生长的植物积累的铜和镍较少，但锰和锌较多。植物生物量与粪肥和土壤 - 粪肥混合物的施用量成比例增加。在任何一种改良尾矿中，柠檬草产生的生物量都比香根草多。从盆栽试验可以看出，施用5%（w/w）的鸡粪并与柠檬草结合，可能是有毒尾矿复垦（植物稳定化）的一个可行选择。
