Use of lees materials as an adsorbent for removal of organochlorine compounds or benzene from wastewater

Adachi, Atsuko; Hamamoto, Hiroko; Okano, Toshio

doi:10.1016/j.chemosphere.2004.09.077

Cited by 19 publications

(7 citation statements)

References 5 publications

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“…When these were applied to wastewater (pH 10) that contained 0.1 g/L of dichloromethane, this organic solvent was removed from the wastewater with an efficiency of 70-90% after 90 min. High correlation was found between the removal efficiency and the number of spherosomes, which are intracellular particles used to absorb organochlorine compounds [144]. It has also been observed that okara (10 g/L) can absorb 96% Cd 2+ and 89% Zn 2+ from water that contained either 50 mg/L Cd 2+ (pH 6) or Zn 2+ (pH 7).…”

Section: Application In Ecological Materialsmentioning

confidence: 85%

Valorisation of By-Products from Soybean (Glycine max (L.) Merr.) Processing

et al. 2020

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In recent years, increased awareness of the health benefits associated with consuming soy-based foods, knowledge of milk-related allergies and a move towards more sustainable food production have led to an increase in the number of available soy-based products. The biggest producers in the world, the USA, South America and China, are from the Pacific region. This enormous production is accompanied by the accumulation of related by-products, in particular, a substance that is known as okara. Okara is a paste that is rich in fibre (50%), protein (25%), fat (10%), vitamins and trace elements. Its proper use would lead to economic advantages and a reduction in the potential for polluting the environment. Its high fibre content and low production costs mean that it could also be used as a dietary supplement to prevent diabetes, obesity and hyperlipidaemia. Chemical or enzymatic treatment, fermentation, extrusion, high pressure and micronisation can all increase the soluble fibre content, and thus improve nutritional quality and processing properties. However, the product also degrades rapidly due to its high moisture content (70–80%), which makes it difficult to handle and expensive to dry by conventional means. The aim of this paper is therefore to thoroughly study the existing literature on this subject in order to develop a general protocol for okara exploitation and valorisation. A cost/benefit analysis could drive the design of eco-friendly, sustainable protocols for the preparation of high-value nutritional products.

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Section: Application In Ecological Materialsmentioning

confidence: 85%

Valorisation of By-Products from Soybean (Glycine max (L.) Merr.) Processing

et al. 2020

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“…Consequently, there is a need to develop useful products from this waste material. Some types of soybean by-products were used as environmentally friendly materials in water treatment, such as soybean hulls (Marshall and Wartelle, 2004); lees materials (Adachi et al, 2005); bean dregs (Li, 2009); and okara. It was found that these materials exhibit diverse sorption capabilities toward anions (e.g.…”

Section: àmentioning

confidence: 99%

A comparative study on different metal loaded soybean milk by-product ‘okara’ for biosorption of phosphorus from aqueous solution

Ngo

Guo

Nguyễn

et al. 2014

Bioresource Technology

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Cationization of agricultural by-products using metal salts is widely used to activate their phosphorous capture ability. This study developed three kinds of new metal loaded soybean milk by-product 'okara' for phosphorus biosorption. A comparative study among these biosorbents was carried out with respect to their performances in terms of affinity, stability and reusability. Zirconium loaded okara (ZLO) was found to have the highest affinity towards PO(4)(3-) anions (47.88 mg/g), followed by iron/zirconium loaded okara--IZLO (40.96 mg/g) and iron loaded okara--ILO (16.39 mg/g). ZLO was successfully desorbed with 0.2M NaOH and activated with 0.1 HCl prior to the next cycle. After five consecutive cycles, the efficiency of both adsorption and desorption of ZLO remained about 85% whilst no Zr(IV) leakage was observed. Conversely, IZLO and ILO suffered from vital short comings such as high metal release and/or sharp reduction in PO4(3-) sequestering capability after multi operation cycles.

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“…However, because of the environmental issues, discharge of VOCs into the atmosphere limits its use. Hydrophobic polymer resins [1], Lees materials such as wheat bran, rape seed, linseed, okara, and sakekasu [7] were reported for the removal of DCM from wastewater.…”

Section: Introductionmentioning

confidence: 99%