Wet-only and bulk deposition studies at New Delhi (India)

Kulshrestha, Umesh Chandra; Sarkar, Agniswar; Srivastava, S. N.; Parashar, D. C.

doi:10.1007/bf01186150

Cited by 58 publications

(23 citation statements)

References 12 publications

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“…However, coarse particles which are generated through disintegration processes are primarily deposited via sedimentation commonly referred as dustfall in a region like India (Rao et al, 1992;Kulshrestha et al, 1995;Gupta et al, 2015). The major sources of dust pollution include suspension of soil, agriculture related activities, road dust, vehicular exhaust, power plants, construction activities, brick kilns and cement factories etc.…”

Section: Introductionmentioning

confidence: 99%

Deposition and Impact of Urban Atmospheric Dust on Two Medicinal Plants during Different Seasons in NCR Delhi

Gupta

Kumar

Singh

et al. 2016

Aerosol Air Qual. Res.

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This study reports dustfall deposition on foliar surfaces of two medicinally important plant species i.e., Arjun (Terminalia arjuna) and Morus (Morus alba) in relation with its impact on biochemical constituents and surfaces morphology of the foliar. The study was carried out at a residential (JNU) and an industrial site (SB) of National Capital Region (NCR) Delhi. The results showed that at the industrial site, the dustfall fluxes were almost 2.5 times higher than that at the residential site. Dustfall fluxes were noticed higher on Morus foliar than Arjun foliar as the roughness of Morus foliar is greater. ) ions were also calculated by analyzing aqueous extract of dustfall at both the site. The results showed that with the increase in dustfall fluxes on the foliar surfaces, the levels of photosynthetic pigments and soluble sugar decreased while the levels of ascorbic and proline amino acid were increased at both the sites for both the plants. Dustfall fluxes had distinct seasonality having the order of fluxes as winter > summer > monsoon. Surface morphological study revealed that dust deposition adversely affects the foliar surface, cuticle and epidermal layers. Dust particle deposition ruptures and blocks the stomatal pores. As compared to the residential site, the foliar samples collected from the industrial site showed a more significant impact of dust on biochemical constituents and surface morphology.

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Section: Introductionmentioning

confidence: 99%

Deposition and Impact of Urban Atmospheric Dust on Two Medicinal Plants during Different Seasons in NCR Delhi

Gupta

Kumar

Singh

et al. 2016

Aerosol Air Qual. Res.

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“…, Gal umn ida e, Parasitidae e Larva de Stafilinidae no sistema de plan tio conv enciona l e de Galu mnid ae, Pa ra si ti da e, Hy po gast ru ra sp ., La rv a de Stafilinidae e Entomobryidae no sistema de plantio direto pode estar relacionada com a persis tê nc ia dos re sí duo s dos herb ic id as fl ua zi fo p-p-bu ty l e fo me sa fe n no s so lo s. Es tu do s de mo ns tr ar am qu e o he rb ic id a fluazif op-p-butyl é altamente adsorvido nas partículas coloi dais da argi la, poden do ser encontrado até a 15 cm de profundidade no solo, e que sua meia -vida, dependen do da temperatura e da umidade, varia de uma a duas semanas (Gessa et al, 1987;WSSA, 1994;Kulshrestha et al, 1995). Com relação à persistência dos resíduos de fomesafen, estudos têm demonstrado que esse produto é moderadamente móvel no solo, sendo rapidamente decomposto em condições anaeróbicas, com meia-vida de três semanas.…”

Section: Resultsunclassified

Efeito de herbicidas sobre a comunidade de artrópodes do solo do feijoeiro cultivado em sistema de plantio direto e convencional

Pereira

Picanço²,

Silva

et al. 2007

Planta daninha

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RESUMO -Neste trabalho, objetivou-se avaliar os efeitos da mistura dos herbicidas fomesafen + fluazifop sobre a comunidade de artrópodes do solo cultivado com feijão nos sistemas plantio direto e convencional. O experimento foi realizado em Argissolo Vermelho-Amarelo distrófico de boa fertilidade, em Coimbra, MG. Duas semanas após o plantio foi aplicada a mistura comercial dos herbicidas fluazifop + fomesafen, denominada Robust ; em cada sistema de cultivo foi mantida uma testemunha sem aplicação de herbicida. O delineamento experimental foi o de blocos casualizados, com cinco repetições. As populações de artrópodes do solo foram amostradas aos 1, 8, 21 e 42 dias após a aplicação do herbicida. Os dados foram submetidos à análise de variáveis canônicas (CVA), que é uma técnica de ordenação indireta que reduz a dimensionalidade do conjunto dos dados originais em um conjunto de variáveis que podem ser usadas para ilustrar graficamente as posições relativas e as orientações das médias das respostas da comunidade em cada tratamento sob comparação. As diferenças entre os tratamen tos na abun dância dos artrópodes selecionados foram determinadas pela análise de variância por medida repetida, considerando a data de amostragem como a medida repetida. A análise das variáveis canônicas CVA para os sistemas de plantio e aplicação de herbicida indicou diferenças na densidade de artrópodes coletados nos diferentes tratamentos estudados, considerando a composição e a abundância das espécies. Foram observadas, por meio do diagrama de ordenação, diferenças no conjunto de artrópodes do solo coletados nos dois sistemas de plantio. A aplicação dos herbicidas afetou a densidade dos artrópodes associados ao feijoeiro em ambos os sistemas de cultivo, com exceção do Solenopsis sp. O sistema de plantio afetou a densidade de todas as espécies estudadas. Red-yellow Podzol, in Coimbra, Minas Gerais, Brazil Palavras-chave: fluazifop-p-butyl, Fomesafen, Phaseolus vulgaris. ABSTRACT -The aim of this research was to evaluate the effect of herbicide mixture (fomesafen + fluazif op) on the soil arthropod communities associated to the common bean in two cropping systems (conventional and no-tillage). The experiment was carried out on

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“…This is due to the fact that the soils in and around the city of Tehran are, CaSO 4 , CaCO 3 , and MgCO 3 rich soils. Source identification has been done with several methods, indicated that SO 4 , NO 3 , NO 2 , F, Br and part of HCO 3 , Cl and NH 4 came from anthropogenic sources, where, Ca,Mg, K, Na, and the most part of HCO3 originated from natural sources (dust). There were also some secondary particles, namely NH 4 NO 2 , NH 4 F, NH 4 Cl,NH 4 NO 3 , NH 4 HSO 4 ,NH 4 (SO 4 ) 2 , in sampled rain waters.…”

Section: Resultsmentioning

confidence: 99%

“…Realizing that, a lot of effort has been made in order to identify the nature and type of those particulates, especially in urban environment [1][2][3][4][5][6][7][8][9][10][11][12] . Study upon the atmospheric pollutants and their nature in Tehran atmosphere goes back to 1991, when Ismaeili Sari 2 , initially attempted to identify the nature of atmospheric pollutants over Tehran by sampling rain waters from synoptic and climatology stations (also, he did the same research for one station in Tehran 3 .…”

Section: Introductionmentioning

confidence: 99%

The study of inorganic ion composition and chemical properties of rain water over Tehran city

Abdemanafi¹,

Meshkatee²,

Hajjam³

et al. 2016

Orient. J. Chem

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Concentrations of major inorganic ions (NH 4 ,Mg,SO 4 ,NO 3 ,NO 2 ,Na,Ca,HCO 3 ,F,Cl,Br,K), PH, Total Dissolved Solids (TDS), Electrical Conductivity (EC), Total Alkalinity and Total Hardness in bulk precipitation samples collected in the Tehran city of I.R. of Iran were analyzed. Results show that concentrations of the found substances were higher over the Mehrabad station. The mean concentration of ions indicated that, HCO 3 , SO 4 and NO 3 and were the main anions, while Ca ,Na,NH 4 and Mg were the main cations. Measured PH had shown that autumn and winter precipitation were mostly acidic while the spring and summer were mostly alkaline. The pH ranged from 4.6 to 8.1 with a mean of 6.3. The alkaline cations Ca and Mg and also Bicarbonate anion acted as acid neutralizers and buffered the acidity of rain. The Bicarbonate anion had the highest concentration, among all other ions, over both stations and plays an important role in reduction of the acidity of the rain water. Study upon the potential sources of the ions over Tehran by means of Correlation Analysis, Enrichment Factor and Principle Component Analysis indicate that existence of Qom salt lake and desert in the south of the city were the main source of the Ca,Mg,K and Na . There are anthropogenic sources for SO 4 ,NO 3 , NO 2 ,F, Br ion's. The other ions HCO 3 and NH 4 were from anthropogenic and dust origin.

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Wet-only and bulk deposition studies at New Delhi (India)

Cited by 58 publications

References 12 publications

Deposition and Impact of Urban Atmospheric Dust on Two Medicinal Plants during Different Seasons in NCR Delhi

Deposition and Impact of Urban Atmospheric Dust on Two Medicinal Plants during Different Seasons in NCR Delhi

Efeito de herbicidas sobre a comunidade de artrópodes do solo do feijoeiro cultivado em sistema de plantio direto e convencional

The study of inorganic ion composition and chemical properties of rain water over Tehran city

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