The sorption of Cd and Zn by different soils in the presence of dissolved organic matter from sludge

Wong, Jonathan W.C.; Li, K. L.; Zhou, Lei; Selvam, Ammaiyappan

doi:10.1016/j.geoderma.2006.08.026

Cited by 121 publications

(45 citation statements)

References 35 publications

(39 reference statements)

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“…There were no significant differences in pore water Zn and Mn concentrations compared to controls (Figs S4 and S5). In a study by Wong et al, (2007), soluble organic carbon did not affect Zn mobility due to the lower affinity of Zn for organic compounds and the great influence of pH on Zn sorption. Overall DOC and Cu were most significantly affected by biochar applications followed by Fe (Table S1).…”

Section: Micronutrient Mobility and Dissolved Organic Carbonmentioning

confidence: 90%

Effects of three different biochars on aggregate stability, organic carbon mobility and micronutrient bioavailability

Hartley

Riby

Waterson

2016

Journal of Environmental Management

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Abstract. Previous studies have demonstrated both beneficial and detrimental effects on soil properties from biochar incorporation. Several biochars, with different feedstock origins, were evaluated for their effectiveness at improving soil quality of a sandy agricultural soil. A pot trial was used to investigate aggregate stability and microbial activity, pore water trace element mobility and micronutrient concentrations in grain of spring wheat after incorporation of three biochars. The feedstocks for biochar production were selected because they were established UK waste products, namely oversize woody material from green waste composting facilities, and rhododendron and soft wood material from forest clearance operations. Biochars were incorporated into the soil at a rate of 5% v/v. Aggregate stability was improved following addition of oversize biochar whilst microbial activity increased in all treatments. Dissolved organic carbon (DOC) concentrations in soil pore water from biochartreated soils were raised, whilst micronutrient concentrations in wheat grain grown in the treated soils were significantly reduced. It was concluded that incorporation of biochar to temperate agricultural soils requires caution as it may result in reductions of essential grain micronutrients required for human health, whilst the effect on aggregate stability may be linked to organic carbon functional groups on biochar surfaces and labile carbon released from the char into the soil system.

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Section: Micronutrient Mobility and Dissolved Organic Carbonmentioning

confidence: 90%

Effects of three different biochars on aggregate stability, organic carbon mobility and micronutrient bioavailability

Hartley

Riby

Waterson

2016

Journal of Environmental Management

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“…Moreover, the metals arrived in the sandy top soil simultaneously with organic matter from the waste water, the metals could therefore have already been associated with dissolved organic matter (Vaca-Paulín et al, 2006;Doelsch et al, 2006). In addition, Wong et al (2007) concluded that dissolved organic matter interacts with the clay minerals becoming less accessible to microorganisms. Due to its higher stability against microorganism degradation, the SOM of the clay fraction could have a stabilization effect on the metals and reduce their bioavailability (Dabkowska-Naskret, 2003).…”

Section: Som and Metal Interactionmentioning

confidence: 99%

Interactions between metals and soil organic matter in various particle size fractions of soil contaminated with waste water

Quénéa¹,

Lamy²,

Winterton³

et al. 2009

Geoderma

175

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. Interactions between metals and soil organic matter in various particle size fractions of soil contaminated with waste water. Geoderma, Elsevier, 2009Elsevier, , vol. 1, pp. 217-223. 10.1016Elsevier, /j.geoderma.2008 Open Archive TOULOUSE Archive Ouverte (OATAO) OATAO is an open access repository that collects the work of Toulouse researchers and makes it freely available over the web where possible. Only scarce field studies concern the consequences of natural soil organic matter (SOM) and metal interactions on SOM dynamics in soils. We investigated the interactions of four metals (Pb, Zn, Cu and Cd) with the SOM associated to five different size fractions (between 2000 µm and b2 µm) of a sandy top soil contaminated by waste water. Metal, organic carbon and nitrogen concentrations were measured and chemical extractions (with Na 4 P 2 O 7 and EDTA) were also performed to assess the variations of SOM-metal interactions irrespective of the size fraction. In addition, as in that selected contaminated site, maize (C 4 plant), replaced C 3 crops 15 years ago, natural isotopic 13 C labelling gave new insights into SOM turnover. First, the results suggest that metals influence the SOM dynamics in that sandy soil: a C 3 "old carbon" enrichment was observed in the small or clay size fractions, while the "new" C 4 carbon associated with sandy soil particles presents a rapid turnover. Metal accumulation in the clay fraction is attributed to particulate organic matter (poorly associated) and SOM decay which overtime accumulated metals and eventually these metal-SOM associations prevent the biological decomposition of such carbon pools. Moreover, the δ 13 C signals, C/N ratios and results from chemical extractions clearly showed differences in the origin, nature and reactivity of the SOM as a function of the size fraction with consequences on the metal behaviour. Differences were observed between metals studied: Zn seems to be mainly bound to SOM associated with clay particles, while Pb seems to prefer to interact directly with the mineral surfaces versus the SOM.

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“…The calculation shows that soil organic matter is far more important in the adsorption of both Cu and Cd than clay minerals. The importance of soil organic matter in the adsorption of heavy metals has been realized by many researchers (Yin et al, 2002;Wong et al, 2007). Based on the calculation, Cu and Cd adsorbed to SOM account respectively for 91-100% and 57-97% of total metal adsorbed in the solid phase.…”

Section: Speciation In Whole Soilmentioning

confidence: 99%

Effects of rice straw on the speciation of cadmium (Cd) and copper (Cu) in soils

Cui

Weng

et al. 2008

Geoderma

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The sorption of Cd and Zn by different soils in the presence of dissolved organic matter from sludge

Cited by 121 publications

References 35 publications

Effects of three different biochars on aggregate stability, organic carbon mobility and micronutrient bioavailability

Effects of three different biochars on aggregate stability, organic carbon mobility and micronutrient bioavailability

Interactions between metals and soil organic matter in various particle size fractions of soil contaminated with waste water

Effects of rice straw on the speciation of cadmium (Cd) and copper (Cu) in soils

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