| 余海波,黄树焘,宋 静,周守标,骆永明.酸化铜尾矿基质改良剂的筛选研究[J].农业环境科学学报,2013,32(9):1800-1805. |
| 酸化铜尾矿基质改良剂的筛选研究 |
| Selection of Amendments for Acidified Copper Mine Tailings |
| |
| DOI：10.11654/jaes.2013.09.014 |
| 中文关键词: 改良剂 铜尾矿砂 重金属 根伸长 |
| 英文关键词: amendment copper mine tailings heavy metals root elongation |
| 基金项目: |
|
| 摘要点击次数: 2467 |
| 全文下载次数: 2875 |
| 中文摘要: |
| 金属尾矿库复垦和生态修复的关键之一是尾矿基质的改良。以安徽铜陵某典型铜尾矿库酸化尾砂为研究对象，利用大麦根伸长毒性试验，结合重金属有效态提取，筛选酸化铜尾矿基质改良剂及其组合。在施加1.9%牛粪厩肥的基础上，随着尾砂pH中和至近中性，有效态重金属（NaNO3提取态）含量及非专性吸附态As[（NH4）2SO4提取态]浓度逐渐降低，但专性吸附态As（NH4H2PO4提取态）含量却持续增加；大麦根长度随Ca（OH）2施加量先增加后减少，在Ca（OH）2施加量为0.9%、pH为5.3时，大麦根最长，即尾砂对大麦根的毒性最低。结果表明专性吸附态As是植物生长主要限制因子。在施加1% Ca（OH）2和1.9%牛粪的基础上，改良剂凹凸棒石、膨润土、沸石和磷矿粉对尾砂pH和大麦根长无显著影响。施加1% Ca（OH）2和1.9%的牛粪是供试酸化铜尾矿较为理想的改良剂组合。 |
| 英文摘要: |
| Amendment is essential for reclamation and ecological restoration of metal mine tailings. The present study is aimed to select amendments for acidified copper mine tailings from Tongling, Anhui Province by using barley root elongation test as well as measurement of available heavy metals by chemical extraction. The results showed that in the presence of 1.9% of cow manure, as the pH of mine tailings increased to near neutral, available heavy metals（NaNO3-extractable metals） and non-specifically adsorbed As measured by（NH4）2SO4-extraction decreased significantly, On the contrary, specifically adsorbed As measured by NH4H2PO4-extraction is increasing with pH. Barley root length increased first and then reduced by addition of Ca（OH）2 with the lowest toxicity occurring at 0.9% of Ca（OH）2 and pH5.3. With the addition of 1% Ca（OH）2 and 1.9% cow manure, the pH of mine tailings and the barley root length were not significant influenced by the addition of attapulgite, bentonite, zeolite or phosphate rock. Therefore, it is concluded that 1% Ca（OH）2 and 1.9% cow manure is the ideal amendment for the acidified copper mine tailings. |
| HTML
查看全文
查看/发表评论 下载PDF阅读器 |
