Effective removal of heavy metals from industrial sludge with the aid of a biodegradable chelating ligand GLDA

Wu, Qing; Cui, Yanrui; Li, Qilu; Sun, Jianhui

doi:10.1016/j.jhazmat.2014.10.027

Cited by 169 publications

(62 citation statements)

References 29 publications

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“…Single washing reagents can usually only remove certain heavy metals (Covelo et al 2007;Mao et al 2015;Wu et al 2015). Thus, multiple washing reagents are usually combined.…”

Section: Effects Of Washing Reagent Combinations On Pb and Zn Removalmentioning

confidence: 99%

Removal of Pb and Zn from contaminated soil by different washing methods: the influence of reagents and ultrasound

Wang

Jiang

et al. 2015

Environ Sci Pollut Res

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Pb and Zn contamination in agricultural soils has become an important issue for human health and the environment. Washing is an effective method for remediating polluted soil. Here, we compare several washing materials and methods in the treatment of Pb- and Zn-polluted farmland soil. We examined four washing reagents, hydrochloric acid, citric acid, Na2EDTA, and tartaric acid, all of which independently removed Zn at rates >65 %. Combining washing reagents markedly enhanced heavy metal removal, by using Na2EDTA and either tartaric acid or lactate in sequence: Pb and Zn removal rates improved to 84.1 and 82.1 % for Na2EDTA-tartaric acid; and to 88.3 and 89.9 % for Na2EDTA-lactate, respectively. Additionally, combining ultrasound with conventional washing methods markedly improved washing efficiency, by shortening washing duration by 96 %. We achieved similar removal rates using ultrasound for 10 min, compared with traditional mechanical vibration alone for 4 h. We concluded that treating Pb- and Zn-contaminated soil with appropriate washing reagents under optimal conditions can greatly enhance the remediation of polluted farmland soils.

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“…Single washing reagents can usually only remove certain heavy metals (Covelo et al 2007;Mao et al 2015;Wu et al 2015). Thus, multiple washing reagents are usually combined.…”

Section: Effects Of Washing Reagent Combinations On Pb and Zn Removalmentioning

confidence: 99%

Removal of Pb and Zn from contaminated soil by different washing methods: the influence of reagents and ultrasound

Wang

Jiang

et al. 2015

Environ Sci Pollut Res

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“…Rapid industrialization has contributed to the increased heavy metal pollution in the environment (Qin et al, 2015; Wu et al, 2015). Effluents from industry mix with rivers and drains, which enter the food chain through crops grown in contaminated water.…”

Section: Introductionmentioning

confidence: 99%

“…Consequently, by consuming contaminated foods, heavy metals accumulate in the human body and lead to severe health problems, including cardiac disorders, digestive disorders, and kidney, stomach, liver, and lung cancer (Qin et al, 2015). Heavy metal pollutants in the soil are toxic and non-biodegradable and are thus extremely persistent and stable in the environment (Wu et al, 2015). Therefore, their removal or conversion to less toxic forms in the water-soil is deemed crucial in order to provide land that is safe and free from heavy metal pollution for agriculture purposes (Amari et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Endophytic Paecilomyces formosus LHL10 Augments Glycine max L. Adaptation to Ni-Contamination through Affecting Endogenous Phytohormones and Oxidative Stress

et al. 2017

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This study investigated the Ni-removal efficiency of phytohormone-producing endophytic fungi Penicillium janthinellum, Paecilomyces formosus, Exophiala sp., and Preussia sp. Among four different endophytes, P. formosus LHL10 was able to tolerate up to 1 mM Ni in contaminated media as compared to copper and cadmium. P. formosus LHL10 was further assessed for its potential to enhance the phytoremediation of Glycine max (soybean) in response to dose-dependent increases in soil Ni (0.5, 1.0, and 5.0 mM). Inoculation with P. formosus LHL10 significantly increased plant biomass and growth attributes as compared to non-inoculated control plants with or without Ni contamination. LHL10 enhanced the translocation of Ni from the root to the shoot as compared to the control. In addition, P. formosus LHL10 modulated the physio-chemical apparatus of soybean plants during Ni-contamination by reducing lipid peroxidation and the accumulation of linolenic acid, glutathione, peroxidase, polyphenol oxidase, catalase, and superoxide dismutase. Stress-responsive phytohormones such as abscisic acid and jasmonic acid were significantly down-regulated in fungal-inoculated soybean plants under Ni stress. LHL10 Ni-remediation potential can be attributed to its phytohormonal synthesis related genetic makeup. RT-PCR analysis showed the expression of indole-3-acetamide hydrolase, aldehyde dehydrogenase for indole-acetic acid and geranylgeranyl-diphosphate synthase, ent-kaurene oxidase (P450-4), C13-oxidase (P450-3) for gibberellins synthesis. In conclusion, the inoculation of P. formosus can significantly improve plant growth in Ni-polluted soils, and assist in improving the phytoremediation abilities of economically important crops.

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“…The most promising technology is adsorption with activated carbon because it removes different types of organic pollutions and heavy metals (Wu et al 2015;Karnib et al 2014;Larous, Meniai 2016;Raki et al 2015). There are three ways to add an adsorption step to an existing WWTP:…”

Section: Removal Of Pharmaceuticalsmentioning

confidence: 99%

Adsorption of Diclofenac, Sulfamethoxazole and Levofloxacin with Powdered Activated Carbon

Lember

Pachel

Loigu

2017

Proccedings of 10th International Conference "Environmental Engineering"

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Abstract. The presence of pharmaceutical residues in the receiving waterbodies of wastewater treatment plants (WWTP) and in the environment has become a global concern. We can now say for certain that, having metabolised in our bodies, partially modified or unmodified pharmaceuticals will reach WWTP. However, WWTP are not designed for the removal of such compounds. Only a small fraction of pharmaceuticals decompose during biological treatment or are adsorbed in sediment. Therefore, it is essential to find a treatment process that is capable of removing pharmaceutical residues. The aim of the present study was to research the removal of three pharmaceuticals found in the environment, namely diclofenac (DCF), sulfamethoxazole (SMX) and levofloxacin (LFX), through the use of powdered activated carbon (PAC). To this end, adsorption tests were conducted where the adsorption capacity was estimated according to the adsorbent dose and the residence time of the process. LFX had the highest adsorption rate: the removal effectiveness was 77% in a residence time of 5 minutes and in 60 minutes a stable indicator was achieved whereby 94% of LFX had become adsorbed. The worst adsorption property was observed for SMX, as 68% of SMX was adsorbed in a residence time of 60 minutes. According to the conducted tests, the Freundlich adsorption isotherms and constants characterising the adsorption were found where the DCF K was 23.8, the SMX K was 34.3 and the LFX K was 106.1. This test demonstrated that the pharmaceuticals selected for the experiment could easily be subjected to adsorption processes and could be removed by means of PAC.

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Effective removal of heavy metals from industrial sludge with the aid of a biodegradable chelating ligand GLDA

Cited by 169 publications

References 29 publications

Removal of Pb and Zn from contaminated soil by different washing methods: the influence of reagents and ultrasound

Removal of Pb and Zn from contaminated soil by different washing methods: the influence of reagents and ultrasound

Endophytic Paecilomyces formosus LHL10 Augments Glycine max L. Adaptation to Ni-Contamination through Affecting Endogenous Phytohormones and Oxidative Stress

Adsorption of Diclofenac, Sulfamethoxazole and Levofloxacin with Powdered Activated Carbon

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