Surface modification of goethite by phosphate for enhancement of Cu and Cd adsorption

Li, Wei; Zhang, Shuzhen; Shan, Xiao-quan

doi:10.1016/j.colsurfa.2006.07.002

Cited by 49 publications

(28 citation statements)

References 28 publications

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“…2), which favors Cd 2+ approaching to the goethite surface. The increase of Cd 2+ adsorption on goethite was also observed for phosphate pretreated goethite [32]. Arsenate of 0.5 mM shifts the Cd adsorption edge to a little Adding Cd firs t the n As( V) after 7 da ys Adding As(V) first then Cd after 7 days Adding Cd and As(V) synchronously lower pH than 0.1 mM As(V).…”

Section: Effects Of Ph and Ionic Strengthmentioning

confidence: 58%

“…The Cd/As(V) adsorption sequence causes the variation in Cd adsorption amount in the tested reaction time, which indicates that the existence of As(V) increases the absolute Cd sorption amount, but the attachment of As(V) on goethite can block some of the adsorption sites for Cd. It has been reported that PO 4 3− can diffuse into the meso-and micro-pores of goethite, reducing specific surface area [15,32]. Considering the similarity of AsO 4 3− and PO 4 3− , it seems reasonable to speculate that AsO 4 3− may block pores on goethite as PO 4 3− did and hinders the diffusion of Cd 2+ cations into the pores and therefore the adsorption kinetics are affected [32].…”

Section: Adsorption Dynamicsmentioning

confidence: 99%

“…It has been reported that PO 4 3− can diffuse into the meso-and micro-pores of goethite, reducing specific surface area [15,32]. Considering the similarity of AsO 4 3− and PO 4 3− , it seems reasonable to speculate that AsO 4 3− may block pores on goethite as PO 4 3− did and hinders the diffusion of Cd 2+ cations into the pores and therefore the adsorption kinetics are affected [32]. When AsO 4 3− is added later or synchronously with Cd 2+ , such binding sites are still available to Cd 2+ .…”

Section: Adsorption Dynamicsmentioning

confidence: 99%

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Arsenate and cadmium co-adsorption and co-precipitation on goethite

Jiang

Luo

et al. 2013

Journal of Hazardous Materials

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147

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Section: Effects Of Ph and Ionic Strengthmentioning

confidence: 58%

Section: Adsorption Dynamicsmentioning

confidence: 99%

Section: Adsorption Dynamicsmentioning

confidence: 99%

See 1 more Smart Citation

Arsenate and cadmium co-adsorption and co-precipitation on goethite

Jiang

Luo

et al. 2013

Journal of Hazardous Materials

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147

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“…α-FeOOH is the most abundant and stable among all and it possesses the capability of incorporating a wide range of environmentally important oxy-anions and cations in its complex matrix. α-FeOOH is commonly used for the degradation of organic pollutants among other FeO, as it is workable in a wide pH range, relatively cheaper than the others, environment friendly, and thermodynamically stable and has a higher efficiency under UV radiation (Li et al 2007). …”

Section: Feo Mineralsmentioning

confidence: 99%

Recent advances and prospects of catalytic advanced oxidation process in treating textile effluents

Buthiyappan

Raman

Daud

2016

Reviews in Chemical Engineering

243

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AbstractIn the past few years, there have been many researches on the use of different types of homogenous catalyst for the degradation of textile wastewater in conventional advanced oxidation processes (AOPs). However, homogenous AOPs suffer from few limitations, including large consumption of chemicals, acidic pH, high cost of hydrogen peroxide, generation of iron sludge, and necessity of post-treatment. Therefore, recently, there have been more researches that focus on improving the performance of conventional AOPs using heterogeneous catalysts such as titanium dioxide, nanomaterials, metal oxides, zeolite, hematite, goethite, magnetite, and activated carbon (AC). Besides, different supports such as AC that have been incorporated with transition metals and clays have been proven to have excellent catalytic activity in AOPs. This paper presents a comprehensive review of advances and prospects of catalytic AOPs for the decontamination of a wide range of synthetic and real textile wastewater. This review provides an up-to-date critical review of the information on the degradation of various textile dyes by a wide range of heterogeneous catalysts and adsorbents. The future challenges of AOPs, including chemical consumption, toxicity assessment, reactor design, and limitation of catalysts, are discussed in this paper. In addition, this paper also discusses the presence of ions, generation of by-products, and industrial applications of AOPs. Special emphasis is given to recent studies and large-scale combination of AOPs for wastewater treatment. This review paper concludes that more studies are needed for the kinetics, reactor design, and modeling of hybrid AOPs and the production of their corresponding intermediate products and secondary pollutants. A better economic model should also be developed to predict the cost of AOPs, as the treatment cost varies with dyes and textile effluents.

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“…At the same time, the presence of phosphate can definitely affect the characteristics of environmental microinterfaces through non-biological reactions. For example, it has been demonstrated that phosphate can be specifically adsorbed by soil minerals [15], strongly competing with dissolved organic carbon (DOC) for sorption sites [7,16] and effectively changing the composition and aggregation of dissolved humic acid on mineral surfaces [5]. On the other hand, due to its colloidal properties, DOC can enhance the apparent solubility of HOC and reduce their sorption to solid matrixes in environmental interfaces [3,[17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Effect of phosphate on phenanthrene sorption in soils

Luo

Zhang

et al. 2011

Journal of Colloid and Interface Science

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a b s t r a c tPhosphate is ubiquitous in the environment. However, its impact on sorption of hydrophobic organic compounds in soils has received little attention. Some effects of phosphate on phenanthrene sorption were investigated in this study using two Chinese soils with contrasting properties. The presence of phosphate significantly decreased the capacity and increased the nonlinearity of phenanthrene sorption in the soils, and this sorption-inhibiting effect was more significant at high phosphate concentration. The influence of phosphate on phenanthrene sorption in the soils was governed by the release of dissolved organic carbon (DOC), particularly higher-molecular-weight and highly aromatic DOC, which tended to be enhanced in the presence of phosphate (p < 0.01) as evidenced by size exclusion chromatography and specific UV absorbance analysis. Atomic force microscopy and f potential analysis reveal that the ringed microaggregates of DOC were disrupted into larger condensed microaggregates and the solid interfaces tended to be more hydrophilic in the presence of phosphate which also inhibited the accumulation of phenanthrene in the soils. This study for the first time points to an important role of phosphate in the sorption of phenanthrene in soils and provides substantial evidence for the mechanisms involved using a combination of microscopic and chromatographic techniques.

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Surface modification of goethite by phosphate for enhancement of Cu and Cd adsorption

Cited by 49 publications

References 28 publications

Arsenate and cadmium co-adsorption and co-precipitation on goethite

Arsenate and cadmium co-adsorption and co-precipitation on goethite

Recent advances and prospects of catalytic advanced oxidation process in treating textile effluents

Effect of phosphate on phenanthrene sorption in soils

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