Soil aggregate-associated heavy metals subjected to different types of land use in subtropical China

A total of forty seven street dust samples, collected from five different types of land use viz., industrial, urban, heavy traffic road, residential and undisturbed areas (control) of Kathmandu district (Nepal), were subjected to characterize the physico-chemical parameters such as pH, electrical conductance (EC), total alkalinity (T. Alk), total organic carbon (TOC) and particle size distribution. Four heavy metals of Cd, Cu, Pb and Zn were determined in dust samples using flame atomic absorption spectrophotometer (FAAS). It was found that all types of dust samples possessed alkaline nature along with variation in EC, T. Alk and TOC values. Results revealed that the dust of industrial areas contained high concentrations of Zn (143.3 mg/kg) and Cu (106.42 mg/kg), whereas the heavy traffic areas were mainly affected by Cd (0.90 mg/kg) and Pb (70.08 mg/kg). The average metal concentrations of Cd, Cu, Pb and Zn in dust of all the types of land use in Kathmandu were found to be 0.73, 68.86, 51.46 and 104.30 mg/kg and their average metal enrichment factors were 2.28, 5.50, 1.92 and 3.17, respectively. The results were also compared against heavy metals status in street dust from various cities/countries around the world. Pollution indices such as contamination factor (CF), degree of contamination (CD) and geo-accumulation index (Igeo) showed different classes of metal contamination in street dust of Kathmandu indicating traffic emission, automobiles, construction and demolition activities and other anthropogenic activities as the potential sources.

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Land use conversion and lithology impacts soil aggregate stability in subtropical China

Geoderma ◽

10.1016/j.geoderma.2021.114953 ◽

2021 ◽

Vol 389 ◽

pp. 114953

Author(s):

Liangxia Duan ◽

Hao Sheng ◽

Hong Yuan ◽

Qing Zhou ◽

Zhenwei Li

Keyword(s):

Land Use ◽

Aggregate Stability ◽

Soil Aggregate ◽

Subtropical China ◽

Soil Aggregate Stability ◽

Land Use Conversion

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Soil aggregate-associated organic carbon dynamics subjected to different types of land use: Evidence from 13C natural abundance

Ecological Engineering ◽

10.1016/j.ecoleng.2018.08.018 ◽

2018 ◽

Vol 122 ◽

pp. 295-302 ◽

Cited By ~ 10

Author(s):

Yi Liu ◽

Wenzhi Liu ◽

Lianhai Wu ◽

Chuang Liu ◽

Li Wang ◽

...

Keyword(s):

Land Use ◽

Organic Carbon ◽

Carbon Dynamics ◽

Soil Aggregate ◽

Natural Abundance ◽

13C Natural Abundance ◽

Different Types

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Divergent response of heavy metal bioavailability in soil rhizosphere to agricultural land use change from paddy field to various drylands

Environmental Science Processes & Impacts ◽

10.1039/d0em00501k ◽

2021 ◽

Author(s):

Yujuan Gao ◽

Jianli Jia ◽

Beidou Xi ◽

Dongyu Cui ◽

Wenbing Tan

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Land Use ◽

Land Use Change ◽

Agricultural Land ◽

Rhizosphere Soil ◽

Agricultural Land Use ◽

Metal Bioavailability ◽

Soil Rhizosphere ◽

Divergent Response

The heavy metal pollution induced by agricultural land use change has attracted great attention. In this study, the divergent response of bioavailability of heavy metals in rhizosphere soil to different...

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Identifying different types of urban land use dynamics using Point-of-interest (POI) and Random Forest algorithm: The case of Huizhou, China

Cities ◽

10.1016/j.cities.2021.103202 ◽

2021 ◽

Vol 114 ◽

pp. 103202

Author(s):

Rong Wu ◽

Jieyu Wang ◽

Dachuan Zhang ◽

Shaojian Wang

Keyword(s):

Land Use ◽

Random Forest ◽

Urban Land ◽

Urban Land Use ◽

Random Forest Algorithm ◽

Point Of Interest ◽

Land Use Dynamics ◽

Different Types

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Micropollutants in Urban Stormwater Runoff of Different Land Uses

Water ◽

10.3390/w13091312 ◽

2021 ◽

Vol 13 (9) ◽

pp. 1312

Author(s):

Daniel Wicke ◽

Andreas Matzinger ◽

Hauke Sonnenberg ◽

Nicolas Caradot ◽

Rabea-Luisa Schubert ◽

...

Keyword(s):

Heavy Metals ◽

Land Use ◽

Surface Waters ◽

Flame Retardants ◽

Stormwater Runoff ◽

Monitoring Program ◽

Quality Standards ◽

Urban Land Use ◽

Organic Micropollutants ◽

Land Use Types

The main aim of this study was a survey of micropollutants in stormwater runoff of Berlin (Germany) and its dependence on land-use types. In a one-year monitoring program, event mean concentrations were measured for a set of 106 parameters, including 85 organic micropollutants (e.g., flame retardants, phthalates, pesticides/biocides, polycyclic aromatic hydrocarbons (PAH)), heavy metals and standard parameters. Monitoring points were selected in five catchments of different urban land-use types, and at one urban river. We detected 77 of the 106 parameters at least once in stormwater runoff of the investigated catchment types. On average, stormwater runoff contained a mix of 24 µg L−1 organic micropollutants and 1.3 mg L−1 heavy metals. For organic micropollutants, concentrations were highest in all catchments for the plasticizer diisodecyl phthalate. Concentrations of all but five parameters showed significant differences among the five land-use types. While major roads were the dominant source of traffic-related substances such as PAH, each of the other land-use types showed the highest concentrations for some substances (e.g., flame retardants in commercial area, pesticides in catchment dominated by one family homes). Comparison with environmental quality standards (EQS) for surface waters shows that 13 micropollutants in stormwater runoff and 8 micropollutants in the receiving river exceeded German quality standards for receiving surface waters during storm events, highlighting the relevance of stormwater inputs for urban surface waters.

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A yeast metabolome-based model for an ecotoxicological approach in the management of lignocellulosic ethanol stillage

Royal Society Open Science ◽

10.1098/rsos.180718 ◽

2019 ◽

Vol 6 (1) ◽

pp. 180718 ◽

Cited By ~ 3

Author(s):

Luca Roscini ◽

Lorenzo Favaro ◽

Laura Corte ◽

Lorenzo Cagnin ◽

Claudia Colabella ◽

...

Keyword(s):

Heavy Metals ◽

Saccharomyces Cerevisiae ◽

Predictive Model ◽

Lignocellulosic Ethanol ◽

Bioethanol Production ◽

Inhibitor Concentration ◽

Promising Tool ◽

Different Types ◽

The Relationship ◽

Ecotoxicological Bioassay

Lignocellulosic bioethanol production results in huge amounts of stillage, a potentially polluting by-product. Stillage, rich in heavy metals and, mainly, inhibitors, requires specific toxicity studies to be adequately managed. To this purpose, we applied an FTIR ecotoxicological bioassay to evaluate the toxicity of lignocellulosic stillage. Two weak acids and furans, most frequently found in lignocellulosic stillage, have been tested in different mixtures against three Saccharomyces cerevisiae strains. The metabolomic reaction of the test microbes and the mortality induced at various levels of inhibitor concentration showed that the strains are representative of three different types of response. Furthermore, the relationship between concentrations and FTIR synthetic stress indexes has been studied, with the aim of defining a model able to predict the concentrations of inhibitors in stillage, resulting in an optimized predictive model for all the strains. This approach represents a promising tool to support the ecotoxicological management of lignocellulosic stillage.

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