Leaching of heavy metals from E-waste in simulated landfill columns

Li, Yadong; Richardson, Jay B.; Bricka, R. Mark; Niu, Xiaojun; Yang, Haizhen; Li, Lin; Jimenez, Arturo

doi:10.1016/j.wasman.2009.02.005

Cited by 71 publications

(32 citation statements)

References 4 publications

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“…All boxes were covered with sawdust, to prevent the release of odorous gases and also to maintain moisture. Importantly, the content of e-waste in the composting mass was around 3.5 % of the mass, inferred based on Spalvins et al (2008), Kiddee et al (2013) and Li et al (2009). After blending the materials to be composted carefully, the boxes were placed in a well-ventilated area and covered to start the process.…”

Section: Preparation Of Boxes For Vermicompostingmentioning

confidence: 99%

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Assessment of Bioavailability of Heavy Metals After Vermicomposting in the Presence of Electronic Waste

Damasceno

Reis

et al. 2015

Rev. Bras. Ciênc. Solo

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Heavy metals contained in electronic waste, if discarded improperly, can become bioavailable after vermicomposting, posing a risk to the environment. small-scale vermicomposting experiments were carried out with printed circuit boards (PCBs) to investigate the migration of heavy metals (Cu, Pb, Zn, Ni, and Sn) to the final compost, as well as the mobility and bioavailability of these metals. High total levels of Pb, sn and Cu in samples of manure with electronic waste (meW) and vegetables with electronic waste (veW) were detected. Based on the initial metal levels in the PCBs and their concentration in the resulting compost, the order of migration of these metals to the meW and veW samples was sn (23.1 %)>Pb (18.4 %)>ni (4.63 %)>Zn (0.46 %)>Cu (0.14 %) and sn (24.3 %)>Pb (23.6 %)>ni (11.33 %)>Zn (1.76 %)>Cu (0.60 %), respectively. mobility and bioavailability of these metals in the compost were evaluated by three-stage sequential extraction, where f1 was the exchangeable fraction, f2 the organic fraction and f3 the residual fraction. the bioavailability factor (Bf) was calculated by the ratio of the sum of fractions f1 and f2 divided by the total sum of the fractions (f1 + f2 + f3). the highest bioavailability factor (Bf = 0.92) was found for Pb, the heavy metal considered the greatest environmental concern in this study, indicating the high mobility and the possibility of becoming bioavailable of this metal.

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Section: Preparation Of Boxes For Vermicompostingmentioning

confidence: 99%

“…Several studies have addressed the contamination of landfills by heavy metals from electronic waste, demonstrating a growing concern regarding the potential negative environmental impact of this type of waste (Spalvins et al, 2008;Li et al, 2009;Kiddee et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Assessment of Bioavailability of Heavy Metals After Vermicomposting in the Presence of Electronic Waste

Damasceno

Reis

et al. 2015

Rev. Bras. Ciênc. Solo

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“…A number of investigations have focused on Sn and Pb leaching from SnPb solder in simulated soil solutions or tap waters (Brennen et al 1998;Cheng et al 2011;Li et al 2008;Townsend et al 2008;Xie and Giammar 2011). Li et al (2009b) reported the E-waste Pb leaching in simulated landfill columns and concluded that Pb highly concentrated in the soil but did not dissolve into the leachate, a unique leaching property in soil environment. Investigating the behaviour and mechanism of heavy metal leaching, from SnPb solder under real soil conditions, could provide more accurate information.…”

Section: Introductionmentioning

confidence: 99%

Leaching behaviour and environmental risk assessment of heavy metals from electronic solder in acidified soil

Lao

Cheng

Min

et al. 2015

Environ Sci Pollut Res

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The leaching behaviour of Sn and Pb elements from eutectic SnPb solder of electronic waste in acidic soil was investigated through acidification with HCl-H2SO4 solution and compared with saline solution. The amounts of Sn and Pb elements leached, when subjected to acidic soil, are higher than those with saline soil. Evidence for the significantly preferential release of Sn into the leachate is provided; the galvanic couple accelerated such preferential release. Surface product analysis reveals the slight damage of SnPb in saline soil. Serious dissolution due to electrochemical reaction and a thick, porous PbSO4 surface layer are observed in acidified soil, suggesting more severe toxicity potential of Pb in soil rather than in water.

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“…High concentrations of Pb were found in TCLP leachates (pH 4.9) from personal computer components, cell phones, and other electronic devices Lincoln et al 2007;Musson et al 2006). However, in simulated landfill columns with soft water and a greater pH (7.5-8), Pb was not present in the leachate even when it was present at high concentrations in the solid samples (Li et al 2009). Leaching in deionised water for only 3 days at 23°C, as in the present study, is expected to be mild.…”

Section: Discussionmentioning

confidence: 99%

Toxicity of Electronic Waste Leachates to Daphnia magna: Screening and Toxicity Identification Evaluation of Different Products, Components, and Materials

Lithner

Halling

Dave

2011

Arch Environ Contam Toxicol

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Electronic waste has become one of the fastest growing waste problems in the world. It contains both toxic metals and toxic organics. The aim of this study was to (1) investigate to what extent toxicants can leach from different electronic products, components, and materials into water and (2) identify which group of toxicants (metals or hydrophobic organics) that is causing toxicity. Components from five discarded electronic products (cell phone, computer, phone modem, keyboard, and computer mouse) were leached in deionised water for 3 days at 23°C in concentrations of 25 g/l for metal components, 50 g/l for mixed-material components, and 100 g/l for plastic components. The water phase was tested for acute toxicity to Daphnia magna. Eighteen of 68 leachates showed toxicity (with immobility of D. magna ≥ 50% after 48 h) and came from metal or mixed-material components. The 8 most toxic leachates, with 48 h EC(50)s ranging from 0.4 to 20 g/l, came from 2 circuit sheets (key board), integrated drive electronics (IDE) cable clips (computer), metal studs (computer), a circuit board (computer mouse), a cord (phone modem), mixed parts (cell phone), and a circuit board (key board). All 5 electronic products were represented among them. Toxicity identification evaluations (with C18 and CM resins filtrations and ethylenediaminetetraacetic acid addition) indicated that metals caused the toxicity in the majority of the most toxic leachates. Overall, this study has shown that electronic waste can leach toxic compounds also during short-term leaching with pure water.

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Leaching of heavy metals from E-waste in simulated landfill columns

Cited by 71 publications

References 4 publications

Assessment of Bioavailability of Heavy Metals After Vermicomposting in the Presence of Electronic Waste

Assessment of Bioavailability of Heavy Metals After Vermicomposting in the Presence of Electronic Waste

Leaching behaviour and environmental risk assessment of heavy metals from electronic solder in acidified soil

Toxicity of Electronic Waste Leachates to Daphnia magna: Screening and Toxicity Identification Evaluation of Different Products, Components, and Materials

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