Heavy metal concentrations and speciation in riverine sediments and the risks posed in three urban belts in the Haihe Basin

Zhang, Chao; Shan, Baoqing; Tang, Wenzhong; Dong, Lixin; Zhang, Wenqiang; Pei, Yuansheng

doi:10.1016/j.ecoenv.2017.01.047

Cited by 98 publications

(33 citation statements)

References 40 publications

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“…The main mechanism for the enrichment of four metals on different media is by ion-exchange and complexation with the negatively charged surface sites of the media [40]. The average accumulation of Cu, Zn, Cd, and Pb over five depths in four reactors was 224.5, 983.1, 249.1, and 529.0 mg·kg −1 , respectively.…”

Section: Accumulation Of Heavy Metalsmentioning

confidence: 91%

“…The Tukey's test after the two-factor ANOVA analysis shows that F5 (residual of Zn, average 66.1% or 649.9 mg·kg −1 in the four reactors) is significantly larger than the other four fractions of adsorption (average 1.8% to 11.6% or 17.5% to 113.8 mg·kg −1 ), with a p-value of 1.8 × 10 −8 ( 0.05). The Zn adsorptions in F2 and F3 were relatively high (average 11.3% or 110.2 mg·kg −1 ), indicating that the adsorption of heavy metal ions is relatively strong and not easy to release [40]. Mo et al also showed that most Zn in soil is present in F5 [45].…”

Section: Znmentioning

confidence: 99%

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Removal of Heavy Metals from Urban Stormwater Runoff Using Bioretention Media Mix

Wang

Zhao

Yang

et al. 2017

Water

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Heavy metals from urban stormwater runoff are important sources of surface water pollutants. Sand, zeolite, sandy loam, and quartz-sand were separately mixed with lignin to form four bioretention media mixes for experimental study using synthetic stormwater runoff. The average removal efficiencies of four heavy metals (Cu, Zn, Cd, and Pb) by the four media mixes were all better than 97% at the optimum pH of 6.05 (ranging from 6 to 8) and the seven-day rainfall-event interval. The influence of the influent concentration and the rainfall-event interval on the removal efficiency of heavy metals by the four media mixes was not significant, but the variation of the removal efficiencies at the four-day rainfall-event interval was large. Under acidic conditions, there was a certain heavy metal dissolution in the four reactors, but the effect on the removal efficiency was minor. Heavy metals were present in the media mainly in the form of the residual fraction (>50%). The accumulation of Cu, Zn, and Cd in the surface planting-soil layer (same humus and sandy-loam mixture for all reactors) was significantly larger than the accumulation at deeper depths but not for Pb. Overall, the heavy metal removal efficiencies by the four media mixes were not significantly different, and the choice of the planting-soil layer can become the control factor of heavy metal removal.

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Section: Accumulation Of Heavy Metalsmentioning

confidence: 91%

Section: Znmentioning

confidence: 99%

Removal of Heavy Metals from Urban Stormwater Runoff Using Bioretention Media Mix

Wang

Zhao

Yang

et al. 2017

Water

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“…The incidence of surface water contamination with toxic and persistent heavy metals is increasing worldwide because of the ever increasing industrialization in most countries (Ahmed and Ahmaruzzaman 2016;Tripathee et al 2016;Wu et al 2016;Zhang et al 2017). In most industrialized areas of the developing countries such as Nigeria, surface waters that receive industrial discharges directly have been rendered unfit for beneficial purposes and aquatic organism habitation (Chandran et al 2016;du Plessis 2017;Khatri et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Monitoring and assessment of sediment contamination with toxic heavy metals: case study of industrial effluent dispersion in Alaro River, Nigeria

Ipeaiyeda

Onianwa

2018

Appl Water Sci

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The influx of effluents from industrial area into the Alaro River in Ibadan has made the investigation of the sediment quality of the river an important environmental issue for discussion. The objective of this study was to determine the concentrations of toxic heavy metals in surface sediment of the river in order to evaluate the impact of the effluent and spatial distribution of the metals downstream. pH, total organic carbon and grain-sized particles of the sediment samples were determined according to standard methods of analysis, while heavy metal concentrations were determined by AAS. Linear least square regression (LLSR) model was employed to describe the distribution pattern of heavy metals along the river network. Hierarchical cluster analysis was applied to locate the heavy metals contamination source and interpret the association between the metal concentrations upstream and downstream, which were found to be significantly different (p = 0.05) The concentrations of Ni, Zn, Cr, Co, Cu, Cd and Pb in downstream sediments were 7. 74 ± 0.97, 19.5 ± 4.6, 5.78 ± 0.47, 9.6 ± 1.6. 7.36 ± 0.61, 0.47 ± 0.03 and 7.76 ± 0.80 mg/kg, respectively. The enrichment factor (EF > 1.5) and pollution load index (PLI > 1.0.) showed that the sediment was contaminated with these heavy metals. The toxicity estimation carried out suggested that the sediment was slightly toxic. Metal distribution as shown by LLSR was such that the concentration decreased with distance downstream with R 2 ranging from 0.8810 to 0.9990. The LLSR models obtained are useful to predict the metal concentrations based on the known distance of the river.

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“…Before any dredging, the chemical characterization together with an eco-toxicological evaluation must be carried out. Although in the past much interest has been focussed on the total concentration of trace elements, it has more recently been accepted that assessing the mobility, the bioavailability, the bioaccessibility, and the toxicity of metals is fundamental (Schintu et al, 2016;Zhang et al, 2017).…”

Section: Chemical Characterizationmentioning

confidence: 99%

Hydrogeological effects of dredging navigable canals through lagoon shallows. A case study in Venice

Teatini

Isotton²,

Nardean

et al. 2017

Hydrol. Earth Syst. Sci.

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Abstract. For the first time a comprehensive investigation has been carried out to quantify the possible effects of dredging a navigable canal on the hydrogeological system underlying a coastal lagoon. The study is focused on the Venice Lagoon, Italy, where the port authority is planning to open a new 10 m deep and 3 km long canal to connect the city passenger terminal to the central lagoon inlet, thus avoiding the passage of large cruise ships through the historic center of Venice. A modeling study has been developed to evaluate the short (minutes), medium (months), and long (decades) term processes of water and pollutant exchange between the shallow aquifer system and the lagoon, possibly enhanced by the canal excavation, and ship wakes. An in-depth characterization of the lagoon subsurface along the channel has supported the numerical modeling. Piezometer and sea level records, geophysical acquisitions, laboratory analyses of groundwater and sediment samples (chemical analyses and ecotoxicity testing), and the outcome of 3-D hydrodynamic and computational fluid dynamic (CFD) models have been used to set up and calibrate the subsurface multi-model approach. The numerical outcomes allow us to quantify the groundwater volume and estimate the mass of anthropogenic contaminants (As, Cd, Cu, Cr, Hg, Pb, Se) likely leaked from the nearby industrial area over the past decades, and released into the lagoon from the canal bed by the action of depression waves generated by ships. Moreover, the model outcomes help to understand the effect of the hydrogeological layering on the propagation of the tidal fluctuation and salt concentration into the shallow brackish aquifers underlying the lagoon bottom.

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Heavy metal concentrations and speciation in riverine sediments and the risks posed in three urban belts in the Haihe Basin

Cited by 98 publications

References 40 publications

Removal of Heavy Metals from Urban Stormwater Runoff Using Bioretention Media Mix

Removal of Heavy Metals from Urban Stormwater Runoff Using Bioretention Media Mix

Monitoring and assessment of sediment contamination with toxic heavy metals: case study of industrial effluent dispersion in Alaro River, Nigeria

Hydrogeological effects of dredging navigable canals through lagoon shallows. A case study in Venice

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