In-Situ Remediation of Arsenic-Contaminated Sites最新文献

Numerical modeling of arsenic mobility 砷迁移率的数值模拟

In-Situ Remediation of Arsenic-Contaminated Sites Pub Date : 2018-10-30 DOI: 10.1201/b17619-10

Henning Prommer Dimitri Vlassopoulos IlkaWallis

引用次数: 0

Fundamentals of electrokinetics 电动力学基础

In-Situ Remediation of Arsenic-Contaminated Sites Pub Date : 2018-10-30 DOI: 10.1201/B17619-13

S. Kim, Keuntae Kim

引用次数: 1

Microbial in-situ mitigation of arsenic contamination in plants and soils 微生物原位缓解植物和土壤中的砷污染

In-Situ Remediation of Arsenic-Contaminated Sites Pub Date : 2018-10-30 DOI: 10.1201/B17619-14

Nandita Singh, P. Srivastava, R. D. Tripathi, Shubhi Srivastava Aradhana Vaish

引用次数: 2

In-situ immobilization of arsenic in the subsurface on an anthropogenic contaminated site 人为污染场地地下砷的原位固定化

In-Situ Remediation of Arsenic-Contaminated Sites Pub Date : 2018-10-30 DOI: 10.1201/B17619-15

T. Krüger, H. Holländer, J. Stummeyer, B. Harazim, Peter-W. Boochs Max Billib

引用次数: 2

Phytostabilization of arsenic 砷的植物稳定性

In-Situ Remediation of Arsenic-Contaminated Sites Pub Date : 2018-10-30 DOI: 10.1201/B17619-4

Claes Bergqvist, M. Greger

{"title":"Phytostabilization of arsenic","authors":"Claes Bergqvist, M. Greger","doi":"10.1201/B17619-4","DOIUrl":"https://doi.org/10.1201/B17619-4","url":null,"abstract":"Arsenic (As) appears in the environment as various As species, which may vary in plant uptake and toxicity. Moreover, As exposure may vary between habitat due to availability and speciation, both of which are influenced by redox potential. To decrease As uptake, addition of silicate may be a tool.The aim of the study was to investigate how the external factors As availability, plant habitats, silicon and oxygen level, influenced the accumulation and speciation of As in plants for food and phytoremediation in a temperate region. The external factors were chosen due to their previously showed influence on As in plants.The risks with dietary As was investigated by plant As accumulation and speciation in carrot, lettuce and spinach grown in alum shale and glassworks soils, and by the influence of silicon on As accumulation in lettuce in hydroponics. Suitable plants for As phytoremediation was investigated by analysing plants from various habitats, and by the O2 influence on phytofiltration.The results showed that vegetables accumulated more As in soils with higher As extractability, and the As extractability in the rhizosphere was higher than in bulk soil. Also, the As concentration in lettuce was higher in hydroponics than in soil, but silicon reduced the accumulation of As in lettuce in hydroponics. Also, the more toxic inorganic As were the main As species detected in vegetables, compared with the less toxic organic As. For phytoremediation, the results showed a low As accumulation in emergent and terrestrial plants. Submerged plants had had a higher shoot As concentration. In general, the habitat had a major influence on the As accumulation in plants. The results also showed that the As accumulation properties in Elodea canadensis was reduced at higher O2.In conclusion, consumption of vegetables cultivated in As polluted soils can result in an elevated intake of inorganic As, and E. canadensis is a promising candidate for As phytofiltration in a temperate region.","PeriodicalId":201855,"journal":{"name":"In-Situ Remediation of Arsenic-Contaminated Sites","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127180482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

In-situ technologies for groundwater treatment: the case of arsenic 地下水原位处理技术:以砷为例

In-Situ Remediation of Arsenic-Contaminated Sites Pub Date : 2018-10-30 DOI: 10.1201/B17619-9

M. Litter, J. Cortina, A. Fiúza, Aurora Silva, C. Tsakiroglou

引用次数: 2

Recent advances in phytoremediation of arsenic-contaminated soils 砷污染土壤植物修复研究进展

In-Situ Remediation of Arsenic-Contaminated Sites Pub Date : 2014-11-05 DOI: 10.1201/B17619-5

Xin Wang, L. Ma

{"title":"Recent advances in phytoremediation of arsenic-contaminated soils","authors":"Xin Wang, L. Ma","doi":"10.1201/B17619-5","DOIUrl":"https://doi.org/10.1201/B17619-5","url":null,"abstract":"Arsenic contamination in soils occurs widely in a range of ecosystems resulting from geological origins and anthropogenic activities. On average, arsenic concentration ranges from 5 to 10 mg kg−1 in uncontaminated soils and above 10 mg kg−1 in contaminated soils (Hossain, 2006). Increased buildup of arsenic in irrigated soils has been widely recognized in South and South-east Asia (Brammer and Ravenscroft, 2009), posing significant threats to agriculture sustainability. In Bangladesh, long-term irrigation with arsenic-rich groundwater from shallow aquifers in dry season adds >1000 tons of arsenic to the agricultural soils (Ali et al., 2003). In addition, arsenic contamination in soils results from various anthropogenic activities, such as mining and smelting (Williams et al., 2009), and using arsenic-containing wood preservatives (Chirenje et al., 2003), pigment, pesticides, herbicide (Sarkar et al., 2005) and feed additives (Arai et al., 2003). As a cost-effective and ecology-friendly technology, phytoremediation of arsenic-contaminated soils has been widely studied. Among phytoremediation technologies, phytoextraction and phytostabilization are two predominant approaches in remediation of soils contaminated with heavy metals. Phytoextraction takes advantage of plants to remove contaminants from soils by concentrating the targeted contaminant to the harvestable tissues (Salt et al., 1998). To achieve effective arsenic removal from soils, the plant should be highly tolerant to arsenic and efficient in accumulating arsenic into sufficient aboveground biomass. Therefore, phytoextraction efficiency depends on both aboveground biomass yield and plant arsenic concentration. Bioconcentration factor (BF), which is defined as the ratio of element concentration in plant shoots to that in soil, has been used to measure a plant’s efficiency in phytoextraction. Based on mass balance calculation, phytoextraction is feasible only by using plants with BF much greater than 1, regardless of how large the harvestable biomass (McGrath and Zhao, 2003). Furthermore, to achieve efficient removal of contaminant in a reasonable time frame with high plant survival and biomass yield, the initial and target soil contaminant concentrations should be taken into account to predict the applicability of phytoextraction, which is in most cases appropriate for soils with low contamination (Zhao and McGrath, 2009). For heavily contaminated sites (e.g., industrial and mining degraded sites), indigenous tolerant species with extensive root system and low translocation factor (TF, the ratio of contaminant concentration in shoots to that in roots) provide valuable plant resources to immobilize the pollutant in the rhizosphere, and simultaneously stabilize the degraded sites by establishing vegetation cover. Soil amendments, in some cases, are essential to assist the success of the survival of pioneering species by mitigating contaminant toxicity and improving substrate conditions (Van","PeriodicalId":201855,"journal":{"name":"In-Situ Remediation of Arsenic-Contaminated Sites","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122068614","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3