| .尿不湿中高吸水性聚合物对矿区土壤的修复及紫花漆姑草（Spergularia purpurea）生长的影响[J].农业环境科学学报,2013,32(7):. |
| 尿不湿中高吸水性聚合物对矿区土壤的修复及紫花漆姑草（Spergularia purpurea）生长的影响 |
| Effect of Hydrophilic Polymers from Diapers on Remediation of Mine Soil Contaminated with Heavy Metals and Growth of Native Plant（Spergularia purpurea） |
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| DOI：10.11654/jaes.2013.07.010 |
| 中文关键词: 尿不湿 高吸水性聚合物 矿区土壤 当地植株 |
| 英文关键词: diaper hydrophilic polymer mine soil native plant |
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| 摘要点击次数: 1792 |
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| 中文摘要: |
| 采用半野外试验研究了尿不湿中高吸水性聚合物对重金属污染矿区土壤的修复作用以及对当地植株生长的影响。试验设置4个处理，分别是对照（CK），粉碎的废弃尿不湿（SD）、从尿不湿中分离出来的高吸水性聚合物（DP）以及纯聚丙烯酸盐（PC）。研究结果显示，尿不湿中高吸水性聚合物处理的土壤上植株覆盖度显著提高，56 d后就完全覆盖土壤表面，明显优于其他处理。该处理下的植株单株和累积生物量也显著增加，分别比对照提高了约2倍和4倍，而且植株体内重金属含量也明显下降。同时，与对照相比，尿不湿中高吸水性聚合物的应用使重金属污染矿区土壤的性质得到显著改善，主要表现在：明显提高了酸性土壤pH，增加了土壤水解酶的活性以及显著改善了土壤脱氢酶（DHA）和土壤基础呼吸，使微生物总体活性得到显著改善。尽管使用粉碎的尿不湿处理的各项结果明显好于对照，但其效果明显低于使用尿不湿中高吸水性聚合物和纯聚丙烯酸盐处理，这可能是由于粉碎的尿不湿中含有大量的塑料和纤维成分造成的。总体来看，使用尿不湿中高吸水性聚合物的效果与纯聚丙烯酸盐处理相似,这表明，回收的尿不湿中高吸水性聚合物可以应用于重金属污染土壤的修复。 |
| 英文摘要: |
| A cylinder experiment was carried out to investigate the effect of hydrophilic polymers from diapers on remediation of mine soil contaminated with heavy metals and growth of local plant（Spergularia purpurea）. Four treatments were designed as control（CK）, hydrophilic polyemrs from diapers（DP）, artificial polyacrylate polymer（PC） and Shredded diapers（SD）. The results showed that using DP enhanced greatly soil cover by plant and covered all soil surface after 56 days, and was faster than other two amended treatments. As compared with CK, single and accumulated plant biomass in the amended soils increased remarkablely, about 3 and 5 times that of CK, and the concentrations of metals in shoot significantly reduced about 40%~60%. The qualities of contaminated mine soil were improved significantly in the treatment with DP if compared with CK as consideration of leveled soil pH（from 4.7 to 6.6）, enhanced soil hydrolytic enzyme activities and improved soil microorganisms activity shown by the means of soil DHA and soil respiration. Although the results from the treatment with SD were significantly better than that of CK, they were worse than other two amended treatments. The possible reason might be the great amount of plastics and fibres in it. Seen from all the results in this experiment, the effect of using DP is similar to PC, which means that recycling hydrophilic polymers from diapers can be applied for the remediation of contaminated soil with heavy metals. |
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