Evaluation of the soil layering and soil lens effect on the ground-borne vibrations induced by twin metro tunnels

The research aimed to make Volcanic soil of Multiple Soil Layering (MSL) with different Hydraulic Loading Rate (HLR) on the purification of polluted irrigation water and to determine the appropriate HLR against purification of polluted irrigation water. The research used an MSL system of the same Soil Mixture Block (SMB) size from a study done by (Chen et al., 2007) arranged in an Acrylic box measuring 50 cm x 10 cm x 60 cm (PxLxT). Making SMB is done by mixing volcanic soil, sawdust, iron, charcoal that has been mashed by 50 mesh sieve, with a combination of 7: 1: 1: 1. The MSL system is supplied with irrigation water taken from the Gunuang Nago irrigation and Pasar Baru area, Cupak Tangah village, Pauh IX sub-district, Padang continuously with different HLR of 250 L/m2/day, 500 L/m2/ day and 1000 L/m2/day. From the result of this research, it is found that MSL system can decrease pollutant content in polluted irrigation water until the concentration below the water quality standard based on PP. 82 of 2001 and MSL system with HLR 250 L/m2/day have high ability in purifying BOD and COD and HLR 1000 L/m2/day has a high ability in purifying NH4+, NO2- and NO3- on polluted irrigation water. Tujuan penelitian ini adalah untuk menentukan pengaruh tanah vulkanik dalam sistem Multiple Soil Layering (MSL) dengan Hydraulic Loading Rate (HLR) yang berbeda terhadap pemurnian air irigasi terpolusi. Penelitian menggunakan sistem MSL dengan ukuran Soil Mixture Block (SMB) yang sama dari penelitian yang telah dilakukan (Chen, Sato, Wakatsuki, & Masunaga, 2007)yang disusun di dalam kotak Acrylic berukuran 50 cm x 10 cm x 60 cm (PxLxT). Soil Mixture Block terdiri dari tanah vulkanik, serbuk gergaji, besi, arang yang telah dihaluskan oleh ayakan 50 mesh, dengan perbandingan kombinasi 7:1:1:1. Sistem MSL dialirkan air irigasi yang diambil dari irigasi Gunuang Nago dan Kawasan Pasar Baru, Kelurahan Cupak Tangah, Kecamatan Pauh IX, Padang secara terus menerus dengan HLR yang berbeda yaitu 250 L/m2/hari, 500 L/m2/hari dan 1000 L/m2/hari. Dari hasil penelitian diperoleh bahwa sistem MSL mampu menurunkan kandungan zat pencemar pada air irigasi terpolusi mencapai kosentrasi di bawah baku mutu air berdasarkan PP No. 82 tahun 2001 dengan HLR 250 L/m2/hari mempunyai kemampuan yang tinggi dalam memurnikan kadar pencemar BOD dan COD sedangkan HLR 1000 L/m2/hari mempunyai kemampuan yang tinggi dalam memurnikan kadar pencemar NH4+, NO2- dan NO3- pada air irigasi terpolusi.

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Leucine aminopeptidase (bovine lens). Effect of pH on the relative binding of Zn2+ and Mg2+ to and on activation of the enzyme.

Journal of Biological Chemistry ◽

10.1016/s0021-9258(17)33925-x ◽

1976 ◽

Vol 251 (1) ◽

pp. 53-60

Author(s):

G A Thompson ◽

F H Carpenter

Keyword(s):

Leucine Aminopeptidase ◽

Effect Of Ph ◽

Lens Effect ◽

Bovine Lens ◽

Relative Binding

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Kerr lens effect induced by a super-Gaussian laser beam

Optik ◽

10.1016/j.ijleo.2021.167250 ◽

2021 ◽

pp. 167250

Author(s):

K. AIT-AMEUR

Keyword(s):

Laser Beam ◽

Gaussian Laser Beam ◽

Lens Effect

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Enhanced pollutant removal from rural non-point source wastewater using a two-stage multi-soil-layering system with blended carbon sources: Insights into functional genes, microbial community structure and metabolic function

Chemosphere ◽

10.1016/j.chemosphere.2021.130007 ◽

2021 ◽

pp. 130007

Author(s):

Qi Zhou ◽

Haimeng Sun ◽

Lixia Jia ◽

Liu Zhao ◽

Weizhong Wu

Keyword(s):

Community Structure ◽

Microbial Community ◽

Point Source ◽

Microbial Community Structure ◽

Carbon Sources ◽

Pollutant Removal ◽

Functional Genes ◽

Metabolic Function ◽

Two Stage ◽

Soil Layering

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Techniques for Greenhouse Evaluation of Herbicides on Saltcedar

Weed Science ◽

10.1017/s0043174500032793 ◽

1977 ◽

Vol 25 (1) ◽

pp. 1-4 ◽

Cited By ~ 5

Author(s):

P.C. Quimby ◽

E.B. Hollingsworth ◽

R.L. McDonald

Keyword(s):

Root Zone ◽

Foliar Application ◽

Field Methods ◽

Limited Efficacy ◽

Greenhouse Evaluation ◽

Soil Layering ◽

Application Techniques ◽

Whole Plants ◽

Over The Top ◽

Pot Plant

Subirrigated pot-plant systems were developed for greenhouse simulations of field methods being tested for herbicidal control of saltcedar (Tamarix pentandraPall.). The methods included: over-the-top spraying; soil injection; soil layering, with whole plants transplanted onto the herbicide layer; and soil layering by severing the roots and concomitantly injecting herbicide. Existing foliar application techniques were improved for greenhouse testing of herbicides and results from preliminary tests were apparently similar to literature reports of limited efficacy in the field. Preliminary results from these greenhouse techniques showed that root zone applications, either by soil layering or soil injection, were very effective; stem or foliar applications were less effective.

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