Biogenic emissions and biomass burning influences on the chemistry of the fogwater and stratiform precipitations in the African equatorial forest

Lacaux, Jean‐Pierre; Loemba-Ndembi, J.; Lefeivre, B.; Cros, B.; Delmas, R.

doi:10.1016/0960-1686(92)90167-j

Cited by 48 publications

(19 citation statements)

References 20 publications

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“…The wet deposits are the lowest estimate of the atmospheric inputs integrating marine (cyclic salts), biogenic, terrestrial, and anthropogenic sources. They were sampled for three water years (1997)(1998)(1999), with an automated collector that only functions during the rain events (Lacaux et al, 1992). The sampling corresponds to 179 events.…”

Section: Samplingmentioning

confidence: 99%

Present weathering rates in a humid tropical watershed: Nsimi, South Cameroon

Braun¹,

Ngoupayou²,

Viers³

et al. 2005

Geochimica et Cosmochimica Acta

163

110

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Section: Samplingmentioning

confidence: 99%

Present weathering rates in a humid tropical watershed: Nsimi, South Cameroon

Braun¹,

Ngoupayou²,

Viers³

et al. 2005

Geochimica et Cosmochimica Acta

163

110

View full text Add to dashboard Cite

“…The ambient concentration of the gas, C x, collected by the passive sampler was calculated from the amount trapped on the sorbant filter (X in mol), the time of exposure (t in s), the diffusion coefficient of the gas ( [Lacaux et al, 1992a[Lacaux et al, , 1993Delmas et al, 1995]. Mineral aerosol levels are also expected to be high in the dry season, due to long-range transport of Saharan soils, and due to soil particles lii•ed into the atmosphere as the result of the convective activity within the fires.…”

Section: The Experimentalmentioning

confidence: 99%

Heterogeneous processes involving nitrogenous compounds and Saharan dust inferred from measurements and model calculations

Galy‐Lacaux¹,

Carmichael²,

Song³

et al. 2001

J. Geophys. Res.

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Abstract. Experimental data on aerosol chemical composition and gaseous concentrations in various African ecosystems have been obtained under the IGAC DEBITS AFRICA (IDAF)program. In this paper, data covering a complete wet and dry season (1996 and 1998) in the semiarid savanna of the Sahelian region of Niger are presented. The analysis of the aerosol chemical composition and the gas phase concentrations at the Banizoumbou station indicates two strong signatures: a nitrogenous component composed of nitric acid, ammonia, particulate ammonium, and nitrates; and a terrigenous component originating from semiarid and desert soils (calcium, carbonates, magnesium, potassium, sulfate). To further investigate the interactions between gas and particles and to help interpret the IDAF experimental data, these data are analyzed using a gas aerosol equilibrium model (Simulating Composition of Atmospheric Particles at Equilibrium (SCAPE)). The model is found to accurately represent the mean aerosol composition for the dry and the wet season of the studied region. It is found that heterogeneous processes involving terrigenous compounds are important and play a major role in partitioning semivolatile species, such as nitric acid, between the gas and aerosol phases. The important role of these heterogeneous processes in the atmospheric chemistry in the Sahelian region is discussed. To compare results obtained in the semiarid savanna of Niger and other African ecosystems, SCAPE model is also applied to humid savanna and forest using IDAF and Experiment for Regional Sources and Sinks of Oxidmats (EXPRESSO) measurements.

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“…Some are left in the fields or burned, which are not suitable methods because these wastes contain high amounts of organic matter and water, and also cause environmental and air pollution (Sabiiti 2011;Jilani et al 2007) by producing smoke, CO 2 , N 2 O, NO 2 , O 3 , and NHO 3 (Ezcurra et al 2001;Hegg et al 1987;Lacaux et al 1992). The direct use of agricultural wastes is not suitable for land and agricultural production because the structures of these wastes are unknown and they contain some contaminants, such as pathogens, weed seeds, heavy metals, and unpleasant odors (Kara and Asan 2007).…”

Section: Composting Of Agricultural Wastesmentioning

confidence: 99%

A review on composting of oil palm biomass

Vakili

Rafatullah

Ibrahim

et al. 2014

Environ Dev Sustain

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Nowadays, the biomass produced in oil palm industry, such as oil palm fronds, palm pressed fibers, palm kernel shells, empty fruit bunch, and liquid waste discharged from the palm oil mill effluent and others, may lead to significant environmental concerns. The quantity of produced wastes by oil palm industry is increasing with the growth of this industry day by day. Therefore, the use of these wastes as compost is considered by researchers to overcome their negative impacts and recycle them to produce a useful byproduct for agriculture. This review analyzes the recent composting studies on palm oil biomass and provides useful information about the potential uses of these biomass in composting as an alternative method for enhanced and sustainable use of biomass produced from oil palm industry. In addition, environmental impacts of composting are discussed. This knowledge could build a platform for researchers in this area to understand the recent developments in palm oil biomass composting by means of addressing the environmental pollution concerns as well.

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Biogenic emissions and biomass burning influences on the chemistry of the fogwater and stratiform precipitations in the African equatorial forest

Cited by 48 publications

References 20 publications

Present weathering rates in a humid tropical watershed: Nsimi, South Cameroon

Present weathering rates in a humid tropical watershed: Nsimi, South Cameroon

Heterogeneous processes involving nitrogenous compounds and Saharan dust inferred from measurements and model calculations

A review on composting of oil palm biomass

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