| 文嘉,曾光明,安赫,贾民娟,易元杰,彭志龙.改性沸石改良底泥对土壤中微生物生物量碳及酶活性的影响[J].农业环境科学学报,2017,36(2):302-307. |
| 改性沸石改良底泥对土壤中微生物生物量碳及酶活性的影响 |
| Effects of zeolite-modified sediment on microbial biomass carbon and enzyme activity in soil |
| 投稿时间：2016-09-07 |
| DOI：10.11654/jaes.2016-1152 |
| 中文关键词: 底泥 改性沸石 土壤酶 微生物生物量碳 |
| 英文关键词: sediment modified zeolite soil enzyme microbial biomass carbon |
| 基金项目:国家自然科学基金项目（51409099，51521006）；中央高校基本科研业务费（531107040752） |
| 作者 | 单位 | | 文嘉 | 湖南大学环境科学与工程学院, 长沙 410082
环境生物与控制教育部重点实验室(湖南大学), 长沙 410082 | | 曾光明 | 湖南大学环境科学与工程学院, 长沙 410082
环境生物与控制教育部重点实验室(湖南大学), 长沙 410082 | | 安赫 | 湖南大学环境科学与工程学院, 长沙 410082
环境生物与控制教育部重点实验室(湖南大学), 长沙 410082 | | 贾民娟 | 湖南大学环境科学与工程学院, 长沙 410082
环境生物与控制教育部重点实验室(湖南大学), 长沙 410082 | | 易元杰 | 湖南大学环境科学与工程学院, 长沙 410082
环境生物与控制教育部重点实验室(湖南大学), 长沙 410082 | | 彭志龙 | 湖南大学环境科学与工程学院, 长沙 410082
环境生物与控制教育部重点实验室(湖南大学), 长沙 410082 |
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| 中文摘要: |
| 为了减小底泥中重金属的活性，实现底泥回田再利用，以洞庭湖重金属污染底泥为实验对象，探究以NaCl和壳聚糖改性沸石改良的底泥对土壤中微生物生物量碳和生物酶（脲酶和脱氢酶）活性的影响。实验结果表明，两种沸石改良底泥添加后，土壤中水溶态金属浓度减小。NaCl改性沸石处理组（沸石/底泥质量比3/7）和壳聚糖改性沸石处理组（沸石/底泥质量比1/9、3/7和6/4）中微生物量碳含量增加，微生物量C/N比最大提高至原来的2.8倍。壳聚糖改性沸石添加底泥对土壤生物酶影响较NaCl改性沸石明显，土壤脲酶和脱氢酶活性随壳聚糖改性沸石投加量的增加而明显提升，壳聚糖改性沸石最大投加量组中（6/4）脲酶和脱氢酶活性较对照组分别增大1.1、1.6倍。 |
| 英文摘要: |
| Heavy metals within the sediment will lead to soil contamination and subsequently cause harmful effects on human beings and organisms if the highly contaminated or not properly managed sediment is disposed on land. In this context, the use of the adsorbent zeolite might be a promising strategy to absorb and stabilize heavy metals in sediments, therefore reducing their mobility and increasing potential to make the sediment for beneficial reuse. In this study, we investigated the influence of two modified Dongting Lake sediments(modified by NaCl and chitosan zeolite) on microbial biomass carbon and two enzyme activities(i.e. urease and dehydrogenase) in soils. Results showed that upon the addition of two zeolite-modified sediments, water soluble metal content in the soil was reduced. Microbial biomass carbon was increased in a NaCl-modified zeolite treatment(zeolite:sediment mass ratio of 3/7) and three chitosan-modified zeolite treatments(zeolite:sediment mass ratio of 1/9, 3/7, and 6/4), and microbial biomass C/N ratio was approximately increased by 2.8-fold. In addition, chitosan-modified zeolite treatment had a greater impact on soil enzyme activities than NaCl-modified zeolite treatment. Urease activity and dehydrogenase activity in the highest dose of chitosan-modified zeolite treatment(zeolite:sediment mass ratio of 6/4) was increased by 1.1- and 1.6-fold, respectively. Therefore, the addition of chitosan-modified zeolite as amendment was an effective technique for sediment remediation, which allows for a possible end point for the dredged sediment. |
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