Chromium uptake by rice and accumulation in soil amended with municipal solid waste compost
Chromium uptake by rice and accumulation in soil amended with municipal solid waste compost
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DOI：
10.1016/j.chemosphere.2005.02.024
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发表时间：
2005-09-01
期刊：
影响因子：
8.8
通讯作者：
Powell, MA
中科院分区：
文献类型：
--
作者：
Bhattacharyya, P;Chakraborty, A;Powell, MA
研究了城市生活垃圾堆肥（MSWC）添加量对水稻田铬含量的影响。1997年至1999年连续三个雨季，在印度加尔各答大学实验农场对淹水种植的水稻进行了试验。采用顺序萃取法测定了MSWC和牛粪（CDM）中的不同铬组分。在MSWC和CDM中，铬与有机物和Fe、Mn氧化物结合明显。稻秆中的铬含量高于稻谷中的铬含量。MSWC中与有机质结合的铬与秸秆Cr （r = 0.99**）、Fe和Mn氧化物（r = 0.97*）以及水溶性和交换性组分（r = 0.96*）的相关性最好。MSWC中水溶性组分和交换性组分与籽粒Cr相关性最好（r = 0.98*）。水稻籽粒Cr含量与水溶性、交换性Cr含量的相关性最高（r = 0.99**），秸秆Cr含量与Fe、Mn氧化物的相关性最高（r = 0.98* *）。MSWC和CDM中的碳酸盐结合和残余组分都与水稻秸秆和谷物铬没有显著相关性。如果MSWC可以安全使用，它将是一种宝贵的农业资源，但长期使用可能需要皮革制革厂和其他主要污染物来源停止倾倒。(C) 2005 Elsevier Ltd版权所有。
Effect of addition of municipal solid waste compost (MSWC) on chromium (Cr) content of submerged rice paddies was studied. Experiments were conducted during the three consecutive wet seasons from 1997 to 1999 on rice grown under submergence, at the Experimental Farm of Calcutta University, India. A sequential extraction method was used to determine the various chromium fractions in MSWC and cow dung manure (CDM). Chromium was significantly bound to the organic matter and Fe and Mn oxides in MSWC and CDM. Chromium content in rice straw was higher than in rice grain. Chromium bound with organic matter in MSWC best correlated with straw Cr (r = 0.99**) followed by Fe and Mn oxides (r = 0.97*) and water soluble as well as exchangeable fractions (r = 0.96*). The water soluble and the exchangeable fractions in MSWC best correlated with grain Cr (r = 0.98*). The Cr content of rice grain had the highest correlation with water soluble and exchangeable Cr (r = 0.99**) while the straw Cr best correlated with the Fe and Mn oxides (r = 0.98*). Both the carbonate bound and residual fractions in MSWC and CDM did not significantly correlate with rice straw and grain Cr. MSWC would be a valuable resource for agriculture if it can be used safely, but long-term use may require the cessation of the dumping by the leather tanneries and other major contributors of pollutants. (C) 2005 Elsevier Ltd. All rights reserved.