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为了探索含腐植酸风化煤对土壤-蔬菜系统重金属镉(Cd)的修复效果,采用盆栽试验,研究不同浓度活化的和未活化的含腐植酸风化煤对Cd胁迫下土壤p H、Cd形态及分布、小白菜生物量及小白菜体内全Cd含量的影响。结果表明:活化的含腐植酸风化煤比未活化的含腐植酸风化煤对土壤重金属Cd钝化作用显著;从小白菜体内全Cd含量分析看,3 mg/kg Cd胁迫下的2HA1+3Cd处理较2HA2+3Cd处理小白菜体内全Cd含量降低17.22%,表明活化的含腐植酸风化煤能有效降低小白菜对Cd的吸收;从小白菜生物量看,4HA1+3Cd处理较CK1+3Cd处理小白菜生物量增加最多,为62.3%,4HA1+10Cd处理较CK2+10Cd处理小白菜生物量增加最多,为32.7%,表明4 g/kg活化的含腐植酸风化煤能有效提高小白菜生物量。
In order to explore the remediation effect of weathered humic coal on the soil-vegetable system of heavy metal cadmium (Cd), pot experiments were conducted to study the effects of different concentrations of activated and unactivated humus-containing weathered coal on the forms of soil Cd and Cd, Distribution, Biomass of Chinese Cabbage and Full Cd Content in Chinese Cabbage. The results showed that activated humic acid-weathered coal had significantly passivation effect on soil heavy metal Cd than unactivated anthracite weathered coal. From the analysis of total Cd content in Chinese cabbage, 2HA1 + 3Cd treatment under 3 mg / kg Cd stress was 2HA2 + 3Cd decreased the total Cd content in Chinese cabbage by 17.22%, indicating that activated humus-containing coal weathering coal can effectively reduce the absorption of Cd in Chinese cabbage; 4HA1 + 3Cd treated cabbage compared with CK1 + 3Cd The highest increase was 62.3%. The biomass increase of Chinese cabbage with 4HA1 + 10Cd and CK2 + 10Cd was the highest (32.7%), which indicated that the 4g / kg activated humus containing coal could effectively increase the biomass of Chinese cabbage.