Chemical Characterization of Sewage Sludges in Chile and Their Potential Utilization as Amendment to Reclaim Soils for Forestation Purposes

Aguilera, S.; Borie, Gilda; Peirano, P.; Rodríguez, M.; Grez, Iván; Zunino, Hugo Marcelo

doi:10.1080/01904160701700400

Cited by 10 publications

(3 citation statements)

References 14 publications

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“…Lower Fe concentration might also be due to competition between Cr and Fe for transport binding or higher Fe efflux from the plants. Cr might influence uptake of Fe by inhibiting Fe reductase activity and inhibit photosynthesis [37,38]. Zn content in leaves also revealed a decreasing trend with increase in chromium concentration from 0.0 to 2.0 mg Cr (VI) kg −1 soil.…”

Section: Resultsmentioning

confidence: 97%

Chromium (VI) Induced Biochemical Changes and Gum Content in Cluster Bean (Cyamopsis tetragonolobaL.) at Different Developmental Stages

et al. 2013

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Chromium (Cr) contamination by various industries and other activities is known to inhibit plants growth and development. The present study was conducted using pot experiments in a net house to determine the effect of Cr (VI) on biochemical parameters such as photosynthetic pigments, reducing sugars, and important minerals at different stages of growth in leaves, stem, and roots of clusterbean, a multipurpose fodder crop including a source of guar gum. Guar gum content was estimated in seeds at maturity. All biochemical contents showed a great variation with respect to increase in Cr concentration at different stages of growth. The levels of K, Fe, and Zn decreased, while Cr and Na content increased with increase in Cr concentration. Cr induced toxicity in clusterbean appears at 0.5 mg Cr (VI) Kg−1 soil with maximum inhibitory effect at 2 mg Cr (VI) Kg−1 soil, where impaired sugar supply resulted in decreased guar gum synthesis and altered micronutrient content. The study reveals the possible role of these biochemical parameters in decreasing plant growth and development under heavy metal stress.

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Section: Resultsmentioning

confidence: 97%

Chromium (VI) Induced Biochemical Changes and Gum Content in Cluster Bean (Cyamopsis tetragonolobaL.) at Different Developmental Stages

et al. 2013

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“…The source of this residue favors its application as a soil-amendment agent (Silveira et al, 2007) that provides considerable agricultural, economic, and environmental benefits (Miao-miao et al, 2007;Navarro and Martínez, 2008), since it makes it possible to improve the physicochemical properties of soils (Aguilera et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Carbon paste electrodes modified with biosolids, soils and biocomposites utilized to study the interaction between organic matter and copper

Flores-Álvarez

González

Rosa

et al. 2011

Journal of Environmental Management

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“…The structural properties of HA determine its applications, among which the molecular weight [3] and aromaticity [4] of HA are two important characteristics. Small molecular weight HA has better water solubility and stronger complexation with metals and thus can be used in wastewater treatment [5], while large molecular weight HA is more suitable for soil improvement due to its poor water solubility and inadvisable loss [6]. Chen [7] found that black soil HA is suitable for soil remediation because of its high aromaticity and flocculation, which is favorable for the accumulation of organic matter and easier to react with metal cations.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Humic Acid from Weathered Coal by Mechanical Energy Activation and Its Properties

Feng,

Xiao,

Condé

et al. 2024

Minerals

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Humic acid (HA) is rich in functional groups with high activity, which can effectively improve the soil environment. The large reserves of weathered coal in China provide sufficient raw material guarantee for HA extraction and utilization. At present, the activation side of weathered coal is still the main technical difficulty that restricts HA extraction. In this study, the weathered coal from Inner Mongolia was used as the raw material, and the mechanical energy was used to activate the weathered coal through a planetary ball mill, which improved the extraction rate of HA and optimized the molecular structure and composition of HA. The effects of four parameters, namely, ball material ratio, ball milling time, ball milling speed, and ball size, on the free HA content of weathered coal were investigated, the HA was extracted by alkaline extraction method, and the activated weathered coal and the extracted HA were characterized. The results showed that a ball material ratio of 9:1, a ball milling speed of 200 r/min, a ball milling time of 200 min, a milling ball size of Ф5:Ф10:Ф15 = 48:42:45 and 56:42:37 are the optimal parameters for the mechanical energy activation, and the HA extraction rate of activated weathered coal under these conditions reached 82.3%, which was 15% higher than that of the unactivated one. Moreover, the aroma of the ball-milled weathered coal increased, the content of oxygenated functional groups increased, and the molecular weight and aroma of HA increased. This provides scientific theoretical guidance for the preparation of HA with high aromaticity and large molecular weight from weathered coal.

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Chemical Characterization of Sewage Sludges in Chile and Their Potential Utilization as Amendment to Reclaim Soils for Forestation Purposes

Cited by 10 publications

References 14 publications

Chromium (VI) Induced Biochemical Changes and Gum Content in Cluster Bean (Cyamopsis tetragonolobaL.) at Different Developmental Stages

Chromium (VI) Induced Biochemical Changes and Gum Content in Cluster Bean (Cyamopsis tetragonolobaL.) at Different Developmental Stages

Carbon paste electrodes modified with biosolids, soils and biocomposites utilized to study the interaction between organic matter and copper

Preparation of Humic Acid from Weathered Coal by Mechanical Energy Activation and Its Properties

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