Khwaja A R, Singh R, Tandon S N
Department of Chemistry, University of Roorkee, India.
Environ Monit Assess. 2001 Apr;68(1):19-35. doi: 10.1023/a:1010790705006.
The leather industry, besides being a major contributor to the Indian national economy, is unfortunately also one of the major polluters. The present article discusses the influence of the wastes on the physicochemical characteristics of the Ganga water and sediments. Two sampling sites have been chosen at Kanpur, the first before and the second after the point where tanneries are located. The same physicochemical parameters which have been determined in the wastes have been monitored at these two sites for two seasons. The results reveal that most parameters increase as the river traverses between these two points. The increase in values of parameters such as BOD, COD, Cl-, and total solids could be due to the domestic wastes just as much as to the tannery wastes. Phenols and sulfides, can also come from other sources, but their probability of coming from tanneries is higher. However, chromium is one parameter which can primarily be identified to originate from the tanneries. The speciation of the sediments for chromium reveals that the leakage of chromium into the Ganga is taking place at the second site. There is almost a ten fold increase in chromium at the second site as compared to the first. At the first site the surface chromium is primarily in the residual fraction while at the second site it is in the Fe-Mn oxide fractions.
皮革行业除了是印度国民经济的主要贡献者外，不幸的是也是主要污染源之一。本文讨论了这些废物对恒河水质和沉积物理化特性的影响。在坎普尔选择了两个采样点，第一个在制革厂所在点之前，第二个在制革厂所在点之后。对这两个采样点的两个季节监测了与废物中测定的相同的理化参数。结果表明，当河流流经这两点之间时，大多数参数都会增加。生化需氧量、化学需氧量、氯离子和总固体等参数值的增加可能同样归因于生活废物和制革厂废物。酚类和硫化物也可能来自其他来源，但其来自制革厂的可能性更高。然而，铬是一个主要可确定源自制革厂的参数。沉积物中铬的形态表明，铬在第二个采样点正渗入恒河。与第一个采样点相比，第二个采样点的铬含量几乎增加了十倍。在第一个采样点，表层铬主要存在于残留部分，而在第二个采样点，它存在于铁锰氧化物部分。
