Sewage sludge fertilization in larch seedlings: Effects on trace metal accumulation and growth performance

Bourioug, Mohamed; Alaoui-Sehmer, Laurence; Laffray, Xavier; Benbrahim, Mohammed; Aleya, Lotfi; Alaoui-Sossé, Badr

doi:10.1016/j.ecoleng.2015.01.031

Cited by 39 publications

(20 citation statements)

References 31 publications

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“…This latter, however, corresponds to the increasing root and shoot water content. Similar effect was observed on Larix decidua seedlings, where SS application improved the net photosynthesis, elevated the chlorophyll content and enhanced the dry matter accumulation rate (Bourioug et al, 2015) Based on the above observations the moderate doses of SS appear to have a good nutritive value. This is further confirmed by the shoot element concentrations.…”

Section: Nutritive Effects Of the Ss Treatmentssupporting

confidence: 59%

Responses of Szarvasi-1 energy grass to sewage sludge treatments in hydroponics

Rév

Tóth

Solti

et al. 2017

Plant Physiology and Biochemistry

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Sewage sludge (SS) originating from communal wastewater is a hazardous material but have a potentially great nutritive value. Its disposal after treatment in agricultural lands can be a very economical and safe way of utilization once fast growing, high biomass, perennial plants of renewable energy production are cultivated. Szarvasi-1 energy grass (Elymus elongatus subsp. ponticus cv. Szarvasi-1), a good candidate for this application, was grown in hydroponics in order to assess its metal accumulation and tolerance under increasing SS amendments. The applied SS had a composition characteristic to SS from communal wastes and did not contain any toxic heavy metal contamination from industrial sludge in high concentration. Toxic effects was assessed in quarter strength Hoagland nutrient solution and only the two highest doses (12.5-18.75 g dm -3 ) caused decreases in root growth, shoot water content and length and stomatal conductance whereas shoot growth, root water content, chlorophyll concentration and the maximal quantum efficiency of photosystem II was unaffected. Shoot K, Ca, Mg, Mn, Zn and Cu content decreased but Na and Ni increased in the shoot compared to the unamended control. The nutritive effect was tested in 1/40 strength Hoagland solution and only the highest dose (12.5 g dm -3 ) decreased root growth and stomatal conductance significantly while lower doses (1.25-6.25 g dm -3 ) had a stimulative effect. Shoot K, Na, Fe and Ni increased and Ca, Mg, Mn, Zn and Cu decreased in this treatment. It was concluded that SS with low heavy metal content can be a potentially good fertilizer for high biomass non-food crops such as Szarvasi-1 energy grass.

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Section: Nutritive Effects Of the Ss Treatmentssupporting

confidence: 59%

Responses of Szarvasi-1 energy grass to sewage sludge treatments in hydroponics

Rév

Tóth

Solti

et al. 2017

Plant Physiology and Biochemistry

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“…Higher quantities of SS provided more nutrients to lettuce, promoting growth and biomass. Improved lettuce growth with SS application has been reported by Munir and Bayan (2004) and specifically attributed to increased N and P in soil (Bourioug et al 2015). Thus, the negative growth effects of control soil and soil amended with a low SS application rate were likely related to soil nutrient deficiencies.…”

Section: Discussionmentioning

confidence: 75%

“…The effects of SS on soil have been extensively discussed in previous studies (Bourioug et al 2015). Higher quantities of SS provided more nutrients to lettuce, promoting growth and biomass.…”

Section: Discussionmentioning

confidence: 98%

Effects of sewage sludge amendment on snail growth and trace metal transfer in the soil-plant-snail food chain

Bourioug

Gimbert

Alaoui-Sehmer

et al. 2015

Environ Sci Pollut Res

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Cu, Zn, Pb, and Cd concentrations in a soil plant (Lactuca sativa) continuum were measured after sewage sludge amendment. The effects of sewage sludge on growth and trace metal bioaccumulation in snails (Cantareus aspersus) were investigated in a laboratory experiment specifically designed to identify contamination sources (e.g., soil and leaves). Application of sewage sludge increased trace metal concentrations in topsoil. However, except Zn, metal concentrations in lettuce leaves did not reflect those in soil. Lettuce leaves were the main source of Zn, Cu, and Cd in exposed snails. Bioaccumulation of Pb suggested its immediate transfer to snails via the soil. No apparent toxic effects of trace metal accumulation were observed in snails. Moreover, snail growth was significantly stimulated at high rates of sludge application. This hormesis effect may be due to the enhanced nutritional content of lettuce leaves exposed to sewage sludge.

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“…Well digested sludge has the appearance and characteristics of a rich potting soil. (Bourioug et al, 2015) Sludge Dewatering:-Sludge dewatering is a crucial step in waste water treatment. Sludge Dewatering is described as Removing enough water from a liquid sludge to change its consistency to that of moist earth it is also called sludge drying, the -dry‖ or dewatered sludge may still contain a significant amount of water, often as much as 70 percent.…”

Section: Issn: 2320-5407mentioning

confidence: 99%