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Trialling Water-Treatment Residuals in the Remediation of Former Mine Site Soils: Investigating Improvements Achieved for Plants, Earthworms, and Soil Solution.
Environmental Toxicology and Chemistry ( IF 4.1 ) Pub Date : 2020-03-05 , DOI: 10.1002/etc.4706
Karrar A H Arab 1, 2 , David F Thompson 3 , Ian W Oliver 1
Affiliation  

During clarification processes of raw water, a vast amount of by-product known as "drinking water-treatment residuals" (WTRs) are produced, being principally composed of hydroxides of the Al or Fe salts added during water treatment plus the impurities they remove. Aluminum-based (Al-WTR) and iron-based (Fe-WTR) materials were applied at 10% w/w to degraded, bare (unvegetated) soils from a restored coal mining site in central England (pH <3.9) to study their potential amelioration effects on earthworm mortality, biomass yield of seedling plants, and element concentrations in plant tissues, earthworm tissues, and soil solutions. A separate treatment with agricultural lime was also conducted for comparison to evaluate whether any observed improvements were attributable to the liming capacity of the WTRs. After completion of the trials, all samples were subjected to a wet-dry cycle, and the experiments were repeated (i.e., simulating longer-term effects in the field). Both types of WTRs significantly increased the biomass of plants, and in some treatments, survival of earthworms was also enhanced compared to nonamended soils. Excess plant tissue element concentrations and element concentrations in soil solutions were reduced in amended soils. The implications are that adding WTRs to mining-impacted soils is a potentially viable, sustainable, and low-cost remediation method that could be used globally to improve the soil condition. Environ Toxicol Chem 2020;39:1277-1291. © 2020 The Authors. Environmental Toxicology and Chemistry published by Wiley Periodicals, Inc. on behalf of SETAC.

中文翻译:

在矿山前土壤的修复中处理水处理残留物:研究植物,Earth和土壤溶液的改良。

在原水的澄清过程中,会产生大量称为“饮用水处理残留物”(WTR)的副产品,主要由水处理过程中添加的Al或Fe盐的氢氧化物以及它们除去的杂质组成。以10%w / w的重量将铝基(Al-WTR)和铁基(Fe-WTR)材料应用到英格兰中部恢复开采的煤矿(pH <3.9)的退化,裸露(无植被)土壤中进行研究它们对potential的死亡率,幼苗植物的生物量产量以及植物组织,earth组织和土壤溶液中元素浓度的潜在改善作用。还进行了单独的农用石灰处理以进行比较,以评估观察到的任何改善是否归因于WTR的石灰能力。完成试验后,所有样品均进行干湿循环,并重复实验(即模拟现场的长期影响)。两种类型的WTR都显着增加了植物的生物量,并且在某些处理中,与未改良的土壤相比,worm的存活也得到了提高。在改良土壤中,过量的植物组织元素浓度和土壤溶液中的元素浓度降低了。其含义是,在受采矿影响的土壤中添加WTR是一种潜在可行,可持续且低成本的补救方法,可在全球范围内用于改善土壤状况。Environ Toxicol Chem 2020; 39:1277-1291。©2020作者。Wiley Periodicals,Inc.代表SETAC发布的《环境毒理学和化学》。模拟该领域的长期影响)。两种类型的WTR都显着增加了植物的生物量,并且在某些处理中,与未改良的土壤相比,worm的存活也得到了提高。在改良土壤中,过量的植物组织元素浓度和土壤溶液中的元素浓度降低了。这意味着将WTR添加到受采矿影响的土壤中是一种潜在可行,可持续和低成本的补救方法,可在全球范围内用于改善土壤状况。Environ Toxicol Chem 2020; 39:1277-1291。©2020作者。Wiley Periodicals,Inc.代表SETAC发布的《环境毒理学和化学》。模拟该领域的长期影响)。两种类型的WTR都显着增加了植物的生物量,并且在某些处理中,与未改良的土壤相比,worm的存活也得到了提高。在改良土壤中,过量的植物组织元素浓度和土壤溶液中的元素浓度降低了。这意味着将WTR添加到受采矿影响的土壤中是一种潜在可行,可持续和低成本的补救方法,可在全球范围内用于改善土壤状况。Environ Toxicol Chem 2020; 39:1277-1291。©2020作者。Wiley Periodicals,Inc.代表SETAC发布的《环境毒理学和化学》。与未改良的土壤相比,earth的存活率也得到了提高。在改良土壤中,过量的植物组织元素浓度和土壤溶液中的元素浓度降低了。这意味着将WTR添加到受采矿影响的土壤中是一种潜在可行,可持续和低成本的补救方法,可在全球范围内用于改善土壤状况。Environ Toxicol Chem 2020; 39:1277-1291。©2020作者。Wiley Periodicals,Inc.代表SETAC出版的《环境毒理学和化学》。与未改良的土壤相比,earth的存活率也得到了提高。在改良土壤中,过量的植物组织元素浓度和土壤溶液中的元素浓度降低了。这意味着将WTR添加到受采矿影响的土壤中是一种潜在可行,可持续和低成本的补救方法,可在全球范围内用于改善土壤状况。Environ Toxicol Chem 2020; 39:1277-1291。©2020作者。Wiley Periodicals,Inc.代表SETAC发布的《环境毒理学和化学》。Environ Toxicol Chem 2020; 39:1277-1291。©2020作者。Wiley Periodicals,Inc.代表SETAC发布的《环境毒理学和化学》。Environ Toxicol Chem 2020; 39:1277-1291。©2020作者。Wiley Periodicals,Inc.代表SETAC发布的《环境毒理学和化学》。
更新日期:2020-03-05
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