Influence of toxic metals on activity of acid and alkaline phosphatase enzymes in metal-contaminated landfill soils

Soil Research ◽  
2004 ◽  
Vol 42 (3) ◽  
pp. 339 ◽  
Author(s):  
S. Roy ◽  
P. Bhattacharyya ◽  
A. K. Ghosh
Keyword(s):  
Alkaline Phosphatase ◽  
Toxic Metals ◽  
Enzyme Activities ◽  
Alluvial Soil ◽  
Enzyme Synthesis ◽  
Soil Enzyme Activities ◽  
Lead Zinc ◽  
Cadmium Lead ◽  
Iron Manganese ◽  
Soil Acid Phosphatase

A study was conducted to determine the effect of toxic metals on soil acid phosphatase (EC 3.1.3.2) and alkaline phosphatase (EC 3.1.3.1) enzyme activities in landfill soils. The enzyme activities were consistently higher in the landfill soils than in an uncontaminated alluvial soil. The landfill soils contained higher concentrations of metals (iron, manganese, cadmium, lead, zinc, copper) than did the alluvial soil. Enzyme activities were negatively correlated with the metals, with inhibition increasing with the bioavailability of the metals. It is suggested that the metals affected enzyme activities by behaving synergistically or additively with each other. Although the landfill soils had higher enzyme activities than the alluvial soil due to higher organic matter concentrations, the ratios of enzyme activity/organic carbon indicated that inhibition of enzyme synthesis and stability had occurred due to metal stress.

scholarly journals The influence of halophytic compost, farmyard manure and phosphobacteria on soil microflora and enzyme activities

2008 ◽  
Vol 53 (No. 4) ◽  
pp. 186-192 ◽  
Author(s):  
V. Balakrishnan ◽  
K. Venkatesan ◽  
K.C. Ravindran
Keyword(s):  
Alkaline Phosphatase ◽  
Enzyme Activities ◽  
Microbial Population ◽  
Farmyard Manure ◽  
Soil Enzyme ◽  
Soil Microflora ◽  
Soil Enzyme Activities ◽  
Chemical Fertilizers ◽  
Soil Microbial ◽  
Soil Microbial Population

Biocompost has been identified as an alternative to chemical fertilizers that increased soil microbial population and soil enzyme activities in sustainable farming. The objective of this field study was to evaluate the effect of three halophytic composts in combination with farmyard manure and phosphate solubilising bacteria (<i>Bacillus megaterium</i>) on soil microflora and enzyme activities. The results show that among nine treatments given, the application of <i>Suaeda</i> compost in combination with farmyard manure and phosphate solubilising bacteria (T<sub>9</sub>) significantly increased the soil microflora such as bacteria, fungi and actinomycetes and soil enzyme activities such as dehydrogenases, alkaline phosphatase, cellulase and urease in soil cultivated with <i>Arachis hypogaea</i>.

scholarly journals Enzyme Activity Variability and Comparison in Soils under Medicinal versus Crop Plants of Anguo City, China

2020 ◽  
Vol 2 (1) ◽  
pp. p109
Author(s):  
Wenke Liu
Keyword(s):  
Alkaline Phosphatase ◽  
Medicinal Plants ◽  
Medicinal Plant ◽  
Plant Species ◽  
Enzyme Activities ◽  
Soil Depth ◽  
Soil Enzyme ◽  
Soil Enzyme Activities ◽  
Crop Fields ◽  
Soil Urease

Long-term continuous cultivation of different plant species in a similar agroecosystem intensively may result in divergent variability in soil fertility, particularly soil biochemical properties. In this study, an investigation was conducted to clarify the variability of five soil enzyme activities (urease, protease, catalase, polyphenol oxidase and alkaline phosphatase) of croplands under medicinal plants (herbal fields) and food crops (crop fields) in Anguo city, a traditional cultivation base for Chinese medicinal plants in China. The results showed that five soil enzyme activities were similar between herbal and crop fields. However, soil urease and alkaline phosphatase activities of herbal and crop fields decreased significantly with soil depth (0-60 cm), while protease, catalase, polyphenol oxidase activities were similar in all soil layers for two kinds of fields. There were largely variation scenes at linear correlation analysis between soil physicochemical traits and enzymatic activities under medicinal plant versus crop fileds although extensively significant correlations were presented. In conclusion, soil enzyme activities were similar in two type of farmlands, and soil urease and alkaline phosphatase activities decreased with soil depth for both fields. Inconsistent linear correlations between soil physicochemical traits and enzymatic activities under medicinal plant versus crop fields were presented, so soil enzymatic activity variation was subjected to soil physicochemical traits dominated by agronomic managements designed for specific plant species.

scholarly journals Temporal Variations in Soil Enzyme Activities and Responses to Land-Use Change in the Loess Plateau, China

2019 ◽  
Vol 9 (15) ◽  
pp. 3129 ◽  
Author(s):  
Deng ◽  
Chong ◽  
Zhang ◽  
Ren ◽  
Zhao ◽  
...  
Keyword(s):  
Alkaline Phosphatase ◽  
Temporal Variation ◽  
Soil Nutrients ◽  
Loess Plateau ◽  
Enzyme Activities ◽  
Dissolved Organic Nitrogen ◽  
Organic Nitrogen ◽  
Soil Enzyme ◽  
Soil Enzyme Activities ◽  
The Loess Plateau

Variability in soil enzyme activity may have important implications for the knowledge of underground ecosystem functions driven by soil extracellular enzymes. To illustrate the temporal variation in soil enzyme activity after afforestation, we collected soil samples during different vegetative growth periods in three Caragana korshinskii Kom. stands of different ages (20, 30, and 40 years) and in a slope cropland in the Loess Plateau. These samples were used to analyze the catalase, sucrase, urease and alkaline phosphatase activities, the soil water content and the available soil nutrients (i.e., dissolved organic carbon, dissolved organic nitrogen, and available phosphorus). The results illustrated that the soil enzyme activities significantly increased following afforestation and varied with temporal variation. Overall, soil enzyme activities were higher in June and August, particularly, and both alkaline phosphatase and sucrase were more sensitive to temporal variation than the other two enzymes. In addition, redundancy analysis showed that soil enzyme activities were greatly correlated with soil nutrients, especially for dissolved organic carbon and dissolved organic nitrogen. Therefore, the results highlighted the importance of soil enzyme activities to soil nutrients under temporal variation following afforestation in the Loess Plateau, which may have practical significance for forest managers’ fertilization management of plantation in different seasons and different stand ages.

Change Analysis of Enzyme Activity under Different Conditions of Film Remnant in Soil

2012 ◽  
Vol 518-523 ◽  
pp. 39-43
Author(s):  
Xiao Guang Zhao ◽  
Yuan Yuan Guan ◽  
Wen Yu Huang
Keyword(s):  
Enzyme Activity ◽  
Enzyme Activities ◽  
Scientific Basis ◽  
Soil Enzyme ◽  
Soil Microorganism ◽  
Soil Enzyme Activities ◽  
Change Analysis ◽  
Soil Material ◽  
The Relationship

In this paper, simulated experiments were performed in pots by using soil materials in different conditions of film remnant. Based on the research on soil microorganism quantity trends of soil enzyme activities were analyzed systematically: soil without film remnant, soil with film remnant for 5, 10, 15 and 20 years. By analyzing crop progress, the relationship with soil material was studied, in order to provide scientific basis for the variation laws between different conditions of film remnant and the activity of soil enzyme.

scholarly journals Removal of toxic metals from aqueous solution by biochars derived from long-root Eichhornia crassipes

2018 ◽  
Vol 5 (10) ◽  
pp. 180966 ◽  
Author(s):  
Qiang Li ◽  
Lizhou Tang ◽  
Jiang Hu ◽  
Ming Jiang ◽  
Xiaodong Shi ◽  
...  
Keyword(s):  
Toxic Metals ◽  
Eichhornia Crassipes ◽  
Adsorption Process ◽  
Correlation Coefficients ◽  
Sorption Ability ◽  
Different Temperatures ◽  
Lead Zinc ◽  
Pseudo Second Order ◽  
Cyano Groups ◽  
Maximum Removal

Biochars were produced from long-root Eichhornia crassipes at four temperatures: 200, 300, 400 and 500°C, referred to as LEC200, LEC300, LEC400 and LEC500, respectively. The sorption ability of lead, zinc, copper and cadmium from aqueous solutions by four kinds of biochars was investigated. All the biochars had lower values of CEC and higher values of pH. LEC500 was the best one to bind toxic metals which can be reflected in the results of SEM, BET and elemental analyser. It was also found that alkyl, carboxyl, phosphate and cyano groups in the biochars can play a role in binding metals. In addition, the sorption processes of four metals by the biochars in different metal concentration were all excellently represented by the pseudo-second-order model with all correlation coefficients R 2 > 0.95. And the sorption processes of four metals in different temperatures could be described satisfactorily by the Langmuir isotherms. According to calculated results by the Langmuir equation, the maximum removal capacities of Pb(II), Zn(II), Cu(II) and Cd(II) at 298 K were 39.09 mg g −1 , 45.40 mg g −1 , 48.20 mg g −1 and 44.04 mg g −1 , respectively. The positive value of the Δ H 0 confirmed the adsorption process was endothermic and the negative value of Δ G 0 confirmed the adsorption process was spontaneous. The sorption capacities were compared with several other lignocellulosic materials which implied the potential of long-root Eichhornia crassipes waste as an economic and excellent biosorbent for eliminating metal ions from contaminated waters.

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