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151.
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153.
付学忠 《辽宁城乡环境科技》1998,18(6):72-73
用压滤干堆的方式进行了尾矿处置,不仅可以控制选矿废水对环境的污染,而且可以节约大量的生产用水和药剂,具有明显的经济效益和环境效益。 相似文献
154.
尾矿处理一直困扰着矿山企业。本文主要介绍掺加铜、铅锌尾矿煅烧水泥新技术,可以取得明显的经济效益、社会效益及环境效益。 相似文献
155.
156.
介绍了使用两段中和法处理矿山酸性废水,即首先用矿物或废渣作中和剂将废水的pH值调节到4.0左右,再用石灰乳进行中和。在实验室研究的基础上,对某铁矿尾矿库酸性废水采用两段中和法进行试验。试验结果表明,出水pH值达到6~8时,出水水质指标达到国家排放标准。 相似文献
157.
Sesbania rostrata is wellknown for its stem nodulation, but the roles of stem nodulation in root nodulation and adaptation of S.
rostrata to Pb/Zn-enriched tailings environment has been poorly understood. We investigated the e ects of inoculating (with stem
nodule treatment) and non-inoculating (without stem nodule treatment) Azorhizobium caulinodans on the growth, root nodulation, and
N fixation of S. rostrata grown on three di erent types of soil substrata: Pb/Zn tailings, garden soil amended tailings, and garden soil.
The results showed that plant height, stem basal diameter, biomass, chlorophyll content, nitrogen content and N-accumulation per plant
were 2.3%–4.9%, 2.2%–7.7%, 27.8%–72.2%, 17.1%–23.5%, 12.3%–34.2%, and 43.1%–131.2%, respectively, higher in treatments
with stem nodule than those without stem nodule for the same soil substrate. With respect to soil substrata, all measurements had
consistently higher values in tailings than in amended tailings and garden soil, indicating that the poorer the soil condition, the greater
the contribution of stem nodule. In contrast, the number and fresh weight of root nodules on plants without stem nodule were 6.9–11.6
times and 5.8–29.0 times higher than those with stem nodule, respectively, especially with respect to the plants grew on Pb/Zn tailings.
In general, stem nodulation favored plant growth and nitrogen fixation of S. rostrata, but suppressed root nodulation. With the ability
of stem and root nodulation, S. rostrata can be used as a pioneer plant species for remediation of Pb/Zn tailings. 相似文献
158.
Seedling growth and metal accumulation of selected woody species in
copper and lead/zinc mine tailings 总被引:1,自引:0,他引:1
Xiang Shi Xiaolei Zhang Guangcai Chen Yitai Chen Ling Wang Xiaoquan Shan 《环境科学学报(英文版)》2011,23(2):266-274
A greenhouse pot experiment was conducted to evaluate the potential of selected woody plants for revegetation in copper (Cu)
and lead/zinc (Pb/Zn) mine tailing areas. Five woody species (Amorpha fruticosa Linn, Vitex trifolia Linn: var. simplicifolia Cham,
Glochidion puberum (Linn.) Hutch, Broussonetia papyrifera, and Styrax tonkinensis) and one herbaceous species (Sesbania cannabina
Pers) were planted in Cu and Pb/Zn tailings to assess their growth, root morphology, nutrition uptake, metal accumulation, and
translocation in plants. Amorpha fruticosa maintained normal growth, while the other species demonstrated stress related growth and
root development. Sesbania cannabina showed the highest biomass among the plants, although it decreased by 30% in Cu tailings and
40% in Pb/Zn tailings. Calculated tolerance index (TI) values suggested that A. fruticosa, an N-fixing shrub, was the most tolerant
species to both tailings (TI values 0.92–1.01), while S. cannabina had a moderate TI of 0.65–0.81 and B. papyrifera was the most
sensitive species, especially to Pb/Zn tailings (TI values 0.15–0.19). Despite the high concentrations of heavy metals in the mine
tailings and plants roots, only a small transfer of these elements to the aboveground parts of the woody plants was evident from the
low translocation factor (TF) values. Among the woody plants, V. trifolia var. simplicifolia had the highest TF values for Zn (1.32),
Cu (0.78), and Pb/Zn (0.78). The results suggested that A. fruticosa and S. cannabina, which have the highest tolerance and biomass
production, respectively, demonstrated the potential for tailings revegetation in southern China. 相似文献
159.
为进一步探究尾矿坝溃决后特有泥石流运移规律,掌握坝体破坏前至溃坝结束全流程发展状态,依托广东省某案例尾矿库为研究对象,采用基于有限元与离散元耦合方法的GDEM-PDyna软件构建泥石流类流体下泄演化数值模型,开展尾矿坝溃决演化分析,动态模拟尾矿库溃决过程中泥砂运动规律及淹没范围,并与MIKE 21软件计算结果进行对比。研究结果表明:尾矿坝溃决后,泥石流类流体流速升高、持续时间较短且尾砂流量发展迅速,2种模拟方法对比结果表明溃坝后坝基位置下泄流量变化与下游敏感点溃坝淹没深度变化情况一致。研究结果可为实现尾矿库下游重点区域灾害评估提供量化支撑,可有效提高尾矿坝溃决后灾害影响评估的精准性。 相似文献
160.