Investigation of landfill leachate toxic potency: An integrated approach with the use of stress indices in tissues of mussels

Tsarpali, Vasiliki; Dailianis, Stefanos

doi:10.1016/j.aquatox.2012.07.008

Cited by 55 publications

(37 citation statements)

References 53 publications

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“…Its ability to induce lethal and pre-pathological alterations on human cells [3,4], mice [5], marine organisms [6,7] and plants [8] is well known and, as a consequence, its proper treatment is imperative. The composition of this kind of effluent is influenced by various factors such as the amount, composition and moisture of the solid waste, age of the landfill, hydrogeology and climate of the site and seasonal weather variations [9].…”

Section: Introductionmentioning

confidence: 99%

Nitrogen Removal from Landfill Leachate by Microalgae

Pereira

Gonçalves

Moreira

et al. 2016

IJMS

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Landfill leachates result from the degradation of solid residues in sanitary landfills, thus presenting a high variability in terms of composition. Normally, these effluents are characterized by high ammoniacal-nitrogen (N–NH4+) concentrations, high chemical oxygen demands and low phosphorus concentrations. The development of effective treatment strategies becomes difficult, posing a serious problem to the environment. Phycoremediation appears to be a suitable alternative for the treatment of landfill leachates. In this study, the potential of Chlorella vulgaris for biomass production and nutrients (mainly nitrogen and phosphorus) removal from different compositions of a landfill leachate was evaluated. Since microalgae also require phosphorus for their growth, different loads of this nutrient were evaluated, giving the following N:P ratios: 12:1, 23:1 and 35:1. The results have shown that C. vulgaris was able to grow in the different leachate compositions assessed. However, microalgal growth was higher in the cultures presenting the lowest N–NH4+ concentration. In terms of nutrients uptake, an effective removal of N–NH4+ and phosphorus was observed in all the experiments, especially in those supplied with phosphorus. Nevertheless, N–NO3− removal was considered almost negligible. These promising results constitute important findings in the development of a bioremediation technology for the treatment of landfill leachates.

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Section: Introductionmentioning

confidence: 99%

Nitrogen Removal from Landfill Leachate by Microalgae

Pereira

Gonçalves

Moreira

et al. 2016

IJMS

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“…Landfill leachate is a sort of organic refractory effluent with complex pollutant constituents and high concentrations of poisons [4,5], including high contents of organic matter (biodegradable and biorefractory), inorganic substances (metals, NH 4 + -N, and chlorides), and xenobiotics consisting of aromatics, phthalates, phenols, pesticides, and other pollutants [6,7]. It is extremely difficult to treat and may impact environmental quality [8], groundwater, and human health [9,10] without improper treatment process [11]. …”

Section: Introductionmentioning

confidence: 99%

“…Meanwhile, landfill leachate effluent has reached the water discharge standard according to the relevant legislation after treatment, and the interactions of its chemicals and toxic degradation products with the biota occurred as well [8]. The effluent ecotoxicity cannot be reduced even though color, COD and total organic carbon (TOC) have been significantly reduced [20,21].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Treatment Process of Landfill Leachate Using the Toxicity Assessment Method

Qiu

Cai

Zhao

et al. 2016

IJERPH

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Landfill leachate is composed of a complex composition with strong biological toxicity. The combined treatment process of coagulation and sedimentation, anaerobics, electrolysis, and aerobics was set up to treat landfill leachate. This paper explores the effect of different operational parameters of coagulation and sedimentation tanks and electrolytic cells, while investigating the combined process for the removal efficiency of physicochemical indices after processing the landfill leachate. Meanwhile, a battery of toxicity tests with Vibrio fischeri, zebrafish larvae, and embryos were conducted to evaluate acute toxicity and calculated the toxicity reduction efficiency after each treatment process. The combined treatment process resulted in a 100% removal efficiency of Cu, Cd and Zn, and a 93.50% and an 87.44% removal efficiency of Ni and Cr, respectively. The overall removal efficiency of chemical oxygen demand (COD), ammonium nitrogen (NH4+-N), and total nitrogen (TN) were 93.57%, 97.46% and 73.60%, respectively. In addition, toxicity test results showed that the acute toxicity of landfill leachate had also been reduced significantly: toxicity units (TU) decreased from 84.75 to 12.00 for zebrafish larvae, from 82.64 to 10.55 for zebrafish embryos, and from 3.41 to 0.63 for Vibrio fischeri. The combined treatment process was proved to be an efficient treatment method to remove heavy metals, COD, NH4+-N, and acute bio-toxicity of landfill leachate.

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“…At least 200 granular haemocytes were examined in each slide and the mean NRR time value corresponds to values obtained in each slide (N ¼ 10) per experimental group. The aforementioned analysis was also performed in haemocytes of control-mussels before (0 days) and after the end of the exposure period (7 days), for assessing their health status during the experimental period, as well as the existence of any time-dependent and/or inter-tank variation that could interfere with the obtained results (Danellakis et al, 2011;Giannapas et al, 2012;Tsarpali and Dailianis, 2012).…”

Section: Mussel Collection and Handlingmentioning

confidence: 99%