Nutrient removal effectiveness by riparian buffer zones in rural temperate watersheds: The impact of no-till crops practices

Junior, Terencio Rebello de Aguiar; Rasera, K.; Parron, L. M.; Brito, A. G.; Ferreira, Maria Teresa

doi:10.1016/j.agwat.2014.10.031

Cited by 77 publications

(33 citation statements)

References 31 publications

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“…Soils with woody vegetation have a higher content of organic matter than soils with grass and shrubs because of the leaves and wood deposited and degraded in the soils [51]. Indeed, 60-m-wide buffers composed of woody soils were more effective in N removal (99.9%) than areas with shrub (83.9%) or grass vegetation (61.6%) [52]. For nitrate however, 20-m-wide woody vegetation showed a good capacity for removing pollutants (65%), while the riparian zone composed of shrubs and grasses did not show good results [53,54].…”

Section: Effect Of Width On the Retention Capacity Of Riparian Buffermentioning

confidence: 99%

Finite Element Simulation of Total Nitrogen Transport in Riparian Buffer in an Agricultural Watershed

Lin

Tang

et al. 2016

Sustainability

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Riparian buffers can influence water quality in downstream lakes or rivers by buffering non-point source pollution in upstream agricultural fields. With increasing nitrogen (N) pollution in small agricultural watersheds, a major function of riparian buffers is to retain N in the soil. A series of field experiments were conducted to monitor pollutant transport in riparian buffers of small watersheds, while numerical model-based analysis is scarce. In this study, we set up a field experiment to monitor the retention rates of total N in different widths of buffer strips and used a finite element model (HYDRUS 2D/3D) to simulate the total N transport in the riparian buffer of an agricultural non-point source polluted area in the Liaohe River basin. The field experiment retention rates for total N were 19.4%, 26.6%, 29.5%, and 42.9% in 1,3,4, and 6m-wide buffer strips, respectively. Throughout the simulation period, the concentration of total N of the 1mwide buffer strip reached a maximum of 1.27 mg/cm 3 at 30 min, decreasing before leveling off. The concentration of total N about the 3mwide buffer strip consistently increased, with a maximum of 1.05 mg/cm 3 observed at 60 min. Under rainfall infiltration, the buffer strips of different widths showed a retention effect on total N transport, and the optimum effect was simulated in the 6mwide buffer strip. A comparison between measured and simulated data revealed that finite element simulation could simulate N transport in the soil of riparian buffer strips.

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Section: Effect Of Width On the Retention Capacity Of Riparian Buffermentioning

confidence: 99%

Finite Element Simulation of Total Nitrogen Transport in Riparian Buffer in an Agricultural Watershed

Lin

Tang

et al. 2016

Sustainability

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“…Further, the pollutant‐trapping potential of buffer strips can range from 50 to 98% for suspended solids (Rudra & Whiteley ), 70–98% for phosphorus and 70–95% for nitrate (Aguiar et al . ).…”

Section: Introductionmentioning

confidence: 97%

“…slope, size, land use) and the plant composition of the buffer strips (herbaceous, woody or both) (Yuan et al 2009). Further, the pollutant-trapping potential of buffer strips can range from 50 to 98% for suspended solids (Rudra & Whiteley 2000), 70-98% for phosphorus and 70-95% for nitrate (Aguiar et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Agricultural sediment reduction using natural herbaceous buffer strips: a case study of the east African highland

Alemu

Bahrndorff

Alemayehu

et al. 2017

Water & Environment J

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Buffer strips are permanently vegetated areas situated immediately adjacent to streams and provide an efficient and economical way to reduce nutrient loads from agricultural areas, but no studies exist of their effectiveness from the East African highlands. We thus evaluated the sediment filtering capabilities of natural herbaceous buffer strips under tropical highland climatic conditions. Overland flow samples were collected at field edges and at various positions in herbaceous buffers and tested for total suspended sediment, nitrate‐nitrogen and total phosphorus. There was a significant effect (P < 0.05) of distance from field edge on the mean values of nutrients. On average, a 10.0 m herbaceous buffer reduced the total phosphorus by 99%, total suspended sediment by 94% and nitrate‐nitrogen by 85%. Altogether, the results suggest that herbaceous buffer strips are important to include in watershed management in agriculturally dominated tropical highlands in order to control sediment loss, stream siltation and the washout of nutrients.

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“…The effects range from skin lesions to cancers, tumors, immune system suppression, DNA damage, reproductive impairment, physical deformities, to death of the organism (Hashmi et al 2011;Damalas and Eleftherohorinos 2011). Andreoli (1993) and Aguiar et al (2014Aguiar et al ( , 2015 reports that by 1970, Brazil had become the world's third largest user of pesticides, only exceeded by France and the USA, but less than 15 % of the active ingredients marketed in Brazil were analyzed. From 1976 to 1984, a study of 17 substances, among them 11 organochlorine pesticides in the Paraná River basin, found that 91.4 % of ambient samples contained at least one.…”

Section: Introductionmentioning

confidence: 99%

Biotite (Black Mica) as an Adsorbent of Pesticides in Aqueous Solution

Ceolin

Junior

Morais

et al. 2015

Water Air Soil Pollut

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Chemical contamination of water resources on the planet generates a range of environmental disturbances which impair ecosystems. Humans ingest such chemicals often present in water. Conventional treatments fail to remove these contaminants from water, requiring complementary methods such as activated carbon filters, reverse osmosis, or distillation, which are expensive and seldom used in the public water supply. In recent years, there has been a search for alternative eco-friendly, low-cost methods which can effectively remove these contaminants. This study was conducted to test the effectiveness of biotite (black mica), an igneous mineral of the mica group, in removing pesticides from water. A trial was designed to assess the rate of pesticide removal using a methodology based on axes of variation of pH, temperature, concentration, and time. The pesticides tested were atrazine, fluazifopp-butyl, lambda-cyhalothrin, chlorpyrifos, and lactofen. The results showed higher removal rates in acidic conditions (pH 3) and temperatures between 20 and 30°C, requiring about 6 h to reach maximum adsorption. More than 80 % of all the pesticides were adsorbed. The best result was obtained for fluazifop (94.2 %) in 6 h, under pH 3, and temperature of 25°C. The study revealed that biotite has a high absorption capacity of complex and varied compounds. These findings signal the need for further studies and tests. Due to the high cost of pesticide analysis, which can only be made using a chromatograph mass spectrometer, financial resources will be required.

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Nutrient removal effectiveness by riparian buffer zones in rural temperate watersheds: The impact of no-till crops practices

Cited by 77 publications

References 31 publications

Finite Element Simulation of Total Nitrogen Transport in Riparian Buffer in an Agricultural Watershed

Finite Element Simulation of Total Nitrogen Transport in Riparian Buffer in an Agricultural Watershed

Agricultural sediment reduction using natural herbaceous buffer strips: a case study of the east African highland

Biotite (Black Mica) as an Adsorbent of Pesticides in Aqueous Solution

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