| 杨凯,王营营,丁爱中.生物炭对铅矿区污染土壤修复效果的稳定性研究[J].农业环境科学学报,2021,40(12):2715-2722. |
| 生物炭对铅矿区污染土壤修复效果的稳定性研究 |
| Stability of biochar-remediated contaminated soil from a lead mine site |
| 投稿时间：2021-04-19 |
| DOI：10.11654/jaes.2021-0463 |
| 中文关键词: 生物炭 老化 土壤修复 铅 酶活性 |
| 英文关键词: biochar aging soil remediation lead enzyme activity |
| 基金项目:国家自然科学基金项目（41907095）；中央高校基本科研业务费专项资金（2020NTST24）；内蒙古自治区科技重大专项（2019ZD001） |
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| 中文摘要: |
| 为探究生物炭钝化修复铅矿区污染土壤的稳定性以及对土壤质量的影响，采集了山西省某铅矿区表层土壤，将500℃下制备的麦秆生物炭和玉米秆生物炭按照0 （对照）和5%质量比分别添加到污染土壤中进行30 d恒温恒湿、30轮（历时30 d）干湿交替和冻融循环3种老化试验。结果表明： 3种老化条件下，玉米秆生物炭对土壤中Pb的钝化效果均好于麦秆生物炭，与各自对照相比，添加玉米秆生物炭处理Pb的有效态含量分别下降了47.4%、16.1%和45.0%。3种老化条件下，玉米秆生物炭未对基于蔗糖酶、脲酶和过氧化氢酶活性的土壤酶综合活性指标产生负面影响。因此，玉米秆生物炭比麦秆生物炭具有更高的用于原位修复铅矿区污染土壤的潜力。 |
| 英文摘要: |
| This study investigated the stability of biochar-remediated contaminated soil from a lead mine site and its influence on the soil quality. In this context, the contaminated topsoil of a lead mine site in Shanxi Province was collected and mixed with wheat straw biochar and corn straw biochar pyrolyzed at 500℃ at a mass ratio of 0(control) and 5%, respectively. Then, this mixture was subjected to three aging experiments:30 d constant temperature and moisture; wet-dry cycling(30 d); and freeze-thaw cycling(30 d). The results showed that under the three aging conditions, the corn straw biochar consistently had a better immobilization effect on soil Pb as opposed to the wheat straw biochar. Compared to the three corresponding controls, the available soil Pb concentration with the addition of corn straw biochar was reduced by 47.4%, 16.1%, and 45.0%, respectively. Corn straw biochar had no negative effect on the geometric mean of soil invertase, urease, and catalase activities. Thus, the corn straw biochar demonstrated a higher potential for the in situ remediation of contaminated soil at lead mine sites compared with its wheat straw counterpart. |
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