Abstract：A field experiment was carried out to investigate the effects of domestic sewage sludge on accumulation and transfer of mercury in soil in wheat/maize rotation system. Five treatments were chosen for this work: chemical fertilizer without sewage sludge (S0), chemical fertilizer with 4.5t/hm2 sewage sludge (S1), chemical fertilizer with 9t/hm2 sewage sludge (S2), chemical fertilizer with 18t/hm2sewage sludge (S3), and chemical fertilizer with 36t/hm2 sewage sludge (S4). The results showed that the Hg concentration obviously increased with age of the sewage sludge utilization. There was a significant linear relationship between the input amount of Hg in sewage sludge and accumulated amounts of Hg in soil. The Hg mainly accumulated in 0-20cm topsoil and accumulation rate could reach 90%. The 5-year continuous application of sewage sludge did a little effect on the Hg concentration in crop grains and shoots when the dose of sewage sludge was less than 2400t/(hm2×a), in which the Hg concentration of sewage sludge was less than the Chinese sludge agricultural pollution control standard limit (GB18918-2002).
翟丽梅, 习斌, 刘宏斌, 刘申. 城市生活污泥农用对作物和土壤中汞的影响[J]. 中国环境科学, 2013, 33(11): 2035-2039.
DI Li-Mei, XI Bin, LIU Hong-Bin, LIU Shen. Effects of domestic sewage sludge on the accumulation and transfer of mercury in crop-soil system. CHINA ENVIRONMENTAL SCIENCECE, 2013, 33(11): 2035-2039.
