Application of a novel strategy—Advanced Fenton-chemical precipitation to the treatment of strong stability chelated heavy metal containing wastewater

Fu, Fenglian; Xie, Liping; Tang, Bing; Wang, Qi; Jiang, Shanhe

doi:10.1016/j.cej.2012.02.073

Cited by 311 publications

(106 citation statements)

References 21 publications

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“…Various methods that have been used to remove different heavy metals from wastewater have also been employed for the removal of cadmium, e.g. chemical precipitation [3], ion exchange [4], electrochemical filter [5], membrane technologies [6], and electro winning [7]. Although the methods are effective, all of them still have serious shortages.…”

Section: Introductionmentioning

confidence: 99%

Biosorption of Cd2+ by untreated dried powder of duckweed Lemna aequinoctialis

Chen

Yang

Jin

et al. 2015

Desalination and Water Treatment

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A B S T R A C TThe duckweed Lemna aequinoctialis was used as a biosorbent material for Cd 2+ adsorption in this study. Influencing factors of Cd 2+ adsorption by L. aequinoctialis in aqueous solution were investigated and the process of the Cd 2+ biosorption was optimized. The results of single-factor experiments suggested that all the factors studied except temperature had significant effects on the removal efficiency of Cd 2+ by L. aequinoctialis. Based on the results of single-factor experiments, optimization of the Cd 2+ biosorption was performed by varying four independent parameters using the central composite design under response surface methodology. The optimal conditions for the maximum removal of Cd 2+ were as follows: grain size of 150-200 mesh, stirring speed of 75 rpm, Cd 2+ initial concentration of 40 mg/L, and sorbent concentration of 8 g dry matter/L. The maximum removal efficiency of 83.5% was obtained, which was in consistence with the predicted value of 83.6%. This process followed pseudo-second-order kinetics and the experimental data fitted well to Langmuir and Freundlich isotherm models. The maximum capacity of duckweed to adsorb Cd 2+ was 33.0 mg/g, demonstrating that untreated dry powder of L. aequinoctialis represents a promising biosorbent for Cd 2+ removal. Fourier transform infrared spectroscopy analysis indicated that the -OH groups of carbohydrate compounds and the -NH 2 groups of amide compounds may be the main groups involved in the adsorption of Cd 2+ by L. aequinoctialis.

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Section: Introductionmentioning

confidence: 99%

Biosorption of Cd2+ by untreated dried powder of duckweed Lemna aequinoctialis

Chen

Yang

Jin

et al. 2015

Desalination and Water Treatment

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show abstract

“…In the past several decades, various methods such as flocculation [2], adsorption [3][4][5], ion exchange [6], reverse osmosis [7], electro dialysis [8], and precipitation [9] have been developed for the removal of heavy metals. However, the widespread application of some technologies has been restricted by high costs, the production of excessive amounts of concentrated solutions, and the disposal of secondary sludge and so on.…”

Section: Introductionmentioning

confidence: 99%

Utilization of annealed aluminum hydroxide waste with incorporated fluoride for adsorptive removal of heavy metals

Liu

et al. 2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…These methods include chemical precipitation [1], reverse osmosis [2], adsorption [3], ion exchange [4] and solvent extraction processes [5]. Those techniques have their own inherent limitations such as low eiciency, sensitive operation conditions, production of secondary sludge, high capital and operating costs, and expensive disposal [6].…”

Section: Introductionmentioning

confidence: 99%

Supported Ionic Liquid Membranes for Metal Separation

Ola¹,

Matsumoto²

2017

Progress and Developments in Ionic Liquids

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Metals are widely used in various areas of human life, and their existence in the environment at high concentrations has become a cause for concern. Metals can enter the human body and disturb the human metabolic system. Therefore, research to recover metals from their matrix both from industrial wastewater and from ores or scraps containing metals is of great importance. One of the separation techniques proposed to overcome those issues involves using supported ionic liquid membranes (SILMs). This chapter summarizes the recovery of metals using SILM. In SILM, an ionic liquid that acts as an extractant is embedded in small pores of a polymer support. The latest type of physical impregnation of ionic liquid, which is the type most commonly used in metal separation, is called polymer inclusion membrane (PIM). PIMs were prepared by casting a solution containing an ionic liquid, a plasticizer and a base polymer to form a thin, lexible and stable ilm. A PIM including ionic liquids has a similar coniguration to SILM, and it is considered to be a kind of SILM. In this chapter, efects on the stability and selectivity in SILM and PIM for metal separation are reviewed.

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Application of a novel strategy—Advanced Fenton-chemical precipitation to the treatment of strong stability chelated heavy metal containing wastewater

Cited by 311 publications

References 21 publications

Biosorption of Cd2+ by untreated dried powder of duckweed Lemna aequinoctialis

Biosorption of Cd2+ by untreated dried powder of duckweed Lemna aequinoctialis

Utilization of annealed aluminum hydroxide waste with incorporated fluoride for adsorptive removal of heavy metals

Supported Ionic Liquid Membranes for Metal Separation

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