Adsorption of lead on organo-mineral complexes isolated from loess in Northwestern China

Fan, Chunhui; Du, Bo; Zhang, Yingchao; Shaolan, Ding; Gao, Yalin; Chang, Min-Sun

doi:10.1016/j.gexplo.2016.02.012

Cited by 14 publications

(4 citation statements)

References 29 publications

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“…In most cases, loess particles are separated by size before modification. Generally, loess particles within a specific size range are separated by the sedimentation method (Fan et al 2017) or the suspension method (Yin et al 2019). LoPs can be separated into three types and clay is the main component in SLoPs (~0.01-10 μm).…”

Section: Separation and Purification Of Loess Particlesmentioning

confidence: 99%

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Review: Progress with Functional Materials Based on Loess Particles

Shen

Yan

Wang

et al. 2021

Clays and clay miner.

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Loess is a large-scale deposit which is easy to mine and widely distributed on the epipedon. The clay fraction of loess, also known as 'loessial clay', is a very important component of loess which affects its properties and performance. From a 'materials' perspective, the clay fraction of loess has been ignored. Recently, loess particles have attracted interest because of their potential applications. The focus in the current review is on the methods of modifying loess particles and their application as functional materials. The major components of loess particles are clays, calcite, and quartz, with the clays including kaolinite, illite, montmorillonite, and chlorite. Loess has a range of particle sizes, types, and dispersibilities. The particles agglomerate readily, mainly because cementation occurs readily in the clay fraction. Loess particles can be modified and their properties can be improved by compaction, separation, purification, acidification, calcination, surfactant modification, geopolymerization, and polymer modification. Loess-based functional materials have been used as sorbents, eco-friendly superabsorbents, soil and water conservation materials, humidity-regulating materials, and building materials. Separated and purified loess particles can adsorb metal ions and harmful elements directly. Surfactant-modified loess particles can remove organic compounds effectively. After modification with polymers, loess particles exhibit greater capacity for the removal of environmental pollutants such as harmful metal ions and dyes. As a superabsorbent, modified loess shows excellent thermal stability and swelling behavior. Calcined loess could be utilized as an energy-saving building material with good humidityregulating performance, and geological polymerization has further expanded the scope of applications of loess in architecture. In summary, loess-based functional materials, which are inexpensive and ecologically friendly, deserve more attention and further development. Keywords-Application . Clay . Functionalization . Loess-based materials . Loess particles CLASSIFICATION, DISTRIBUTION, COMPOSITION, AND PHYSICOCHEMICAL PROPERTIES OF LOESS Classification and Distribution Loess can be classified from various perspectives. Using the geological and geographical classification, loess has been divided into plateau, intermontane basin,

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Section: Separation and Purification Of Loess Particlesmentioning

confidence: 99%

“…1.6 mg g -1 (Particle interaction,) Porous structure with chelating ligands (Fan et al 2017) Loess-based polymers Loess located in Lanzhou, China, collected from cliff. Loess particles were separated and modified by in situ copolymerization of functional monomers, such as AA and HEMA.…”

Section: Adsorption Of Organicsmentioning

confidence: 99%

Review: Progress with Functional Materials Based on Loess Particles

Shen

Yan

Wang

et al. 2021

Clays and clay miner.

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“…Keeping this in mind, environmental and physicochemical conditions for conducting an experiment have been carefully considered in order to reach an optimal efficiency. Maximum removal capacity of Pb ions was affected by its initial concentration, adsorbent dose, contact time, pH, metal speciation, temperature, and presence of NO3and Cl - (Mouflih et al, 2006;Liu & Zhang, 2009;Mishra & Patel, 2009;Fan et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Investigation of Lead and Iron Removal from Groundwater Using Sapropel and Quartz Sand

Heang

Albrektienė

Paliulis

2020

International Conference “Environmental Engineering”

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In Prey Nop district of Cambodia, a district in coastal area, it was observed that concentration of iron and lead in groundwater was higher than permissible values. Lead is a highly toxic heavy metal, while iron is an element causing several problems related to the deterioration of taste and aesthetic appearance of water and the capacity reduction of water supply pipelines. Therefore, this article investigates the effectiveness of the technology for removing lead and iron from groundwater using the cheapest materials like sapropel and sand. In this study, different doses of sapropel (0.1, 0.2, 0.4, 0.5, 0.6, 0.8, 1, 2, 3, 4, 5 and 6 g/L), different durations of sorption processes (30, 60, 90, 120 and 150 min) and a laboratory bench for iron filtration filled with quartz sand were used for lead and iron ions removal. Results from the bench tests showed that both iron and lead were removed at efficiencies of 70 and 97%, and their concentrations did not exceed the permissible levels by using the lowest dose of 0.1 g/L of sapropel for sorption of lead and filtration through quartz sand filters for iron removal.

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“…However, organic compounds are less difficult to degrade in compost [51]. The compost and simultaneous application of biochar-compost can also increase and maintain a high percentage of TOC in soil compared to a single application of compost [44,52]. SOM promotes a further role in increasing the soil AP in alkaline soil conditions (pH > 7.5), which favors Ca-P precipitation reactions, resulting in a sequence of products that have a direct effect on the soil pH and phosphorus solubility [53,54].…”

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confidence: 99%

Organo-Mineral Fertilization Based on Olive Waste Sludge Compost and Various Phosphate Sources Improves Phosphorus Agronomic Efficiency, Zea mays Agro-Physiological Traits, and Water Availability

et al. 2023

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In the context of intensive and sustainable agriculture, limiting soil degradation and the loss of organic matter has become an obligation to maintain food security. The use of organo-mineral fertilizer (OMF) products is an innovative technology that may solve the different challenges raised. This study aimed to evaluate the effect of various organo-mineral fertilizer (OMF) formulations on Zea mays agro-physiological traits, phosphorus (P)-related parameters, and water conservation during a 90-day pot experiment. The OMF formulations consisted of blending several doses of a stable OMWS compost (10 t /ha(OMF1), 50 t/ha (OMF2), or 100 t/ha (OMF3)) with different sources of mineral P, namely diammonium phosphate (DAP), rock phosphate (RP), or phosphate washing sludge (PWS), compared with separate applications. The results indicated that the effect of an OMF on the soil and plants was strongly dependent on the source of P used and the dose of OMWS compost. The best agronomic performance was attributed to OMF1-based DAP, which resulted in a significant improvement in the shoot and root biomass dry weight by more than 260% and 40%, respectively. However, using an OMF2 formulation was more optimal when using RP and PWS as mineral P sources. Independently of the type of P fertilizer, the addition of stable OM systematically improved multiple soil properties, including water availability, and the nutrient concentrations, such as the available P, exchangeable potassium, and magnesium. Furthermore, the plant’s respiration, photosynthetic activity, and nutrient assimilations were positively affected by the OMF formulations. Overall, our results demonstrate that organo-mineral fertilization is a promising solution for increasing the efficiency of low-P and high-P mineral fertilizers in alkaline soils through direct and indirect mechanisms involving improved soil properties and higher P solubilization.

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Adsorption of lead on organo-mineral complexes isolated from loess in Northwestern China

Cited by 14 publications

References 29 publications

Review: Progress with Functional Materials Based on Loess Particles

Review: Progress with Functional Materials Based on Loess Particles

Investigation of Lead and Iron Removal from Groundwater Using Sapropel and Quartz Sand

Organo-Mineral Fertilization Based on Olive Waste Sludge Compost and Various Phosphate Sources Improves Phosphorus Agronomic Efficiency, Zea mays Agro-Physiological Traits, and Water Availability

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