Effects of Irrigation with Reclaimed Water on Soil Salinize-alkalization and Heavy Metal Distribution
Effects of Irrigation with Reclaimed Water on Soil Salinize-alkalization and Heavy Metal Distribution
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发表时间：
2008
影响因子：
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通讯作者：
Lin Da-song
中科院分区：
文献类型：
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作者：
Lin Da-song
再生水已成为干旱半干旱地区重要的灌溉水源之一。利用再生水进行灌溉试验。试验期间，分别用自来水和二级处理后的污水进行灌溉。试验结果表明，再生水处理后0 ~ 15 cm土层的溶解性总固体含量增加，土壤含水量增加，土壤含水量增加。土壤阳离子含量变化不明显，重金属在土壤系统中的分布格局表明，没有发现重金属的积累迹象，同时，不同处理量的污水灌溉土壤中重金属含量差异不显著，土壤中重金属含量远低于国家标准的临界值，说明短期内再生水灌溉不会对土壤环境造成危害。
Reclaimed wastewater is becoming one of the important water resources for irrigation,especially in arid and semi-arid areas.Experiments of irrigation with treated sewage effluent were conducted.During the period of experiments,tap water and secondary treated sewage effluent were used for irrigation,respectively.The experimental results showed that the total dissolved solid of 0 to 15 cm soil layer increased,the contents of soil cation were not obviously changed.The distribution on pattern of heavy metals in soil system indicated that no accumulation evidence of heavy metals was found.Meanwhile,no significant difference can be detected for the contents of heavy metals in soils irrigated with different quantities of treated sewage effluent.The concentrations of heavy metals in soil were found much lower than the critical values of Chinese National Standard.It therefore implies that short-term irrigation with reclaimed wastewater cannot result in soil environmental hazard.