Wettability decay in an oil-contaminated waste-mineral mixture with dry-wet cycles

Wettability decay in an oil-contaminated waste-mineral mixture with dry-wet cycles
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干湿循环中受油污染的废矿物混合物的润湿性衰减

DOI:
10.1007/s12665-015-4276-z
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发表时间:
2015
影响因子:
2.8
通讯作者:
Lourenço S
Lourenço S
中科院分区:
环境科学与生态学4区
文献类型:
--
作者:
Lourenço S

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土壤颗粒润湿性与土壤含水量的关系表明,土壤在干湿循环过程中具有可湿性,在干燥过程中具有拒水性。虽然这已被广泛证明,但当疏水性土壤受到一系列循环时,结果是矛盾的。此外,过去的润湿性测量很少在自然或干燥含水量下从现场收集的样品中进行,很少有人意识到轻微的粒度变化、不同的干湿历史和织物(根据不同的润湿性测量方法的要求)可能会改变结果。本文介绍了土壤颗粒润湿性-土壤含水量关系,通过指数测试,在8个月的时间里,对来自巴里码头(英国)的未经处理的、受石油污染的人为土壤(矿渣、煤颗粒、粉煤灰和矿物颗粒的混合物)进行了分阶段的干燥和润湿路径,这是一个正式用于石油储存的地点,将被修复和重新开发为住房。结果表明,随着干湿循环的进行,疏水性降低,矿化度和细菌活性增加。
The dependency of soil particle wettability on soil water content implies that soils subjected to drying-wetting cycles become wettable with wetting and water repellent with drying. While this has been demonstrated widely, the results are contradictory when water repellent soils are subjected to a sequence of cycles. Added to this, past wettability measurements were seldom done in batches of samples collected from the field at natural or dry water contents, with little appreciation that slight particle size variations, different drying-wetting histories and fabric (as required by different wettability measurement methods) may alter the results. This note presents soil particle wettability—soil water content relations by means of an index test following staged drying and wetting paths over a period of 8 months for an untreated, oil-contaminated anthropogenic soil (a mixture of slag, coal particles, fly ash and mineral particles) from Barry Docks (UK), a site formally used for oil storage, which is to be remediated and redeveloped for housing. The results revealed a decrease in the water repellency and increasing mineralization and bacterial activity with the wetting and drying cycles.
加拿大阿尔伯塔省阿萨巴斯卡油砂区未受干扰和开垦土壤的防水性和临界水含量调查
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