摘要
通过模拟降雨及降雨后自然条件下的土壤表面水分蒸发,对粉煤灰、城市污泥及采自于铁矿山上的尾矿砂以不同比例配比用于无土排岩场生态修复人工土壤的持水性能进行了研究。结果表明,在不同配比的人工土壤中,粉煤灰与污泥比例为1∶2的处理(Ⅳ)蓄水能力最强,饱和含水率比对照高11%,但持水能力较低;随着污泥配施比例的增加,人工土壤的蓄水能力和持水能力都在增强(Ⅰ<Ⅱ<Ⅲ<Ⅳ),但当污泥与粉煤灰的配比达到2∶1时,人工土壤的持水能力却出现下降趋势;添加了尾矿砂的处理Ⅴ(粉煤灰∶污泥∶尾矿砂=2∶1∶1),蓄水能力较低,但持水能力在所有处理中却最强。从总体能力上评价,粉煤灰与污泥配比为1∶1的处理Ⅲ的持水和蓄水能力都较平衡稳定,性能最优,其次为粉煤灰与污泥配比为2∶1的处理Ⅱ。
To study the water-holding capacities of the artificial soil composed of fly ash, sewage sludge and mine tailing, which was applied to the abandoned rock mining junkyard reclamation, experiments were designed to simulate rainfall and natural evaporation. The results indicated that among all the artificial soils, the treatment IV （the ratio of fly ash to sewage sludge was l：2）had the highest water-saturation coefficient, 11% higher than that of the CK treatment, but had a shorter water-holding time than other artificial soils. With the ratio of sewage sludge to fly ash increasing, the water-saturation coefficient and the water-holding capacity of the artificial soil became stronger （Ⅰ〈Ⅱ〈Ⅲ〈Ⅳ）, but when the ratio came to 2：1, the water-holding capacity decreased. The water-holding capacity of the treatment with mine tailing （fly ash： sewage sludge：mine tailing=2：1：1） was the strongest. In the whole, the treatment Ⅲ （the ratio of fly ash to sewage sludge was 1：1） had the best physical characteristic because of its stable and balanceable water-holding capacity, and the next was the treatment Ⅱ （the ratio of fly ash to sewage sludge was 2：1）.
出处
《农业环境科学学报》
CAS
CSCD
北大核心
2008年第1期160-164,共5页
Journal of Agro-Environment Science
基金
国家自然科学基金项目(20477029)
辽宁省自然科学基金项目(20062002)
关键词
粉煤灰
城市污泥
尾矿砂
持水性能
排岩场
coal fly ash
municipal sewage sludge
mine tailing
water-holding capacity
mining junkyard
作者简介
张鸿龄（1979-），女，博士，主要研究方向为环境污染学。E-mail：zhl19792002@163．com
