A magnetic soil remediation agent for soil heavy metal pollution and a preparation method and application thereof are provided. The magnetic soil remediation agent is prepared by using remediation agent framework material and magnetic core material as raw materials, and heavy metal collector as modifier; said framework material is silicon dioxide activated by strong alkali; said magnetic core material comprises magnetic materials Fe.sub.3O.sub.4 and γ-Fe.sub.2O.sub.3; said modifier comprises ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid trisodium salt (NTA), (S,S)-ethylenediamine-N,N-disuccinic acid trisodium salt (EDDS) and mercaptoethylamine. The remediation agent of the present invention can effectively passivate the heavy metals in the soil, reduce their available contents, and inhibit the absorption of heavy metals by plants.

A magnetic soil remediation agent for soil heavy metal pollution and a preparation method and application thereof are provided. The magnetic soil remediation agent is prepared by using remediation agent framework material and magnetic core material as raw materials, and heavy metal collector as modifier; said framework material is silicon dioxide activated by strong alkali; said magnetic core material comprises magnetic materials Fe.sub.3O.sub.4 and γ-Fe.sub.2O.sub.3; said modifier comprises ethylenediaminetetraacetic acid (EDTA), nitrilotriacetic acid trisodium salt (NTA), (S,S)-ethylenediamine-N,N-disuccinic acid trisodium salt (EDDS) and mercaptoethylamine. The remediation agent of the present invention can effectively passivate the heavy metals in the soil, reduce their available contents, and inhibit the absorption of heavy metals by plants.

A magnetic soil remediation agent for soil heavy metal pollution and a preparation method and application thereof are provided. The magnetic soil remediation agent is prepared by using remediation agent framework material and magnetic core material as raw materials, and heavy metal collector as modifier; said framework material is silicon dioxide activated by strong alkali; said magnetic core material comprises magnetic materials Fe.sub.3O.sub.4 and γ-Fe.sub.2O.sub.3; said modifier comprises ethylenediaminetetraacetic acid (EDTA, nitrilotriacetic acid trisodium salt (NTA, (S,S)-ethylenediamine-N,N-disuccinic acid trisodium salt (EDDS) and mercaptoethylamine. The remediation agent of the present invention can effectively passivate the heavy metals in the soil, reduce their available contents, and inhibit the absorption of heavy metals by plants.

A magnetic soil remediation agent for soil heavy metal pollution and a preparation method and application thereof are provided. The magnetic soil remediation agent is prepared by using remediation agent framework material and magnetic core material as raw materials, and heavy metal collector as modifier; said framework material is silicon dioxide activated by strong alkali; said magnetic core material comprises magnetic materials Fe.sub.3O.sub.4 and γ-Fe.sub.2O.sub.3; said modifier comprises ethylenediaminetetraacetic acid (EDTA, nitrilotriacetic acid trisodium salt (NTA, (S,S)-ethylenediamine-N,N-disuccinic acid trisodium salt (EDDS) and mercaptoethylamine. The remediation agent of the present invention can effectively passivate the heavy metals in the soil, reduce their available contents, and inhibit the absorption of heavy metals by plants.

The present subject matter is directed to a method of making a coconut coir product comprising providing coconut coir husks; sieving fibers from the husks to yield desired size coir fiber; collecting the desired size coir fiber; mixing a treatment mixture; mixing the treatment mixture with the desired size coir fiber to form a combination; allowing the combination to react for an initial treatment time of at least 2 hours to produce a reaction; drawing a sample from the combination; testing the sample to determine one or more measured values by measuring for sodium value, potassium value, magnesium value, calcium value, or some combination thereof; and comparing the one or more measured values to one or more standards to determine if the reaction is complete.

The present subject matter is directed to a method of making a coconut coir product comprising providing coconut coir husks; sieving fibers from the husks to yield desired size coir fiber; collecting the desired size coir fiber; mixing a treatment mixture; mixing the treatment mixture with the desired size coir fiber to form a combination; allowing the combination to react for an initial treatment time of at least 2 hours to produce a reaction; drawing a sample from the combination; testing the sample to determine one or more measured values by measuring for sodium value, potassium value, magnesium value, calcium value, or some combination thereof; and comparing the one or more measured values to one or more standards to determine if the reaction is complete.

The present subject matter is directed to a coconut coir product comprising coconut coir having some values for electrolytes of interest in a range as measured by photoelectric flame photometry, or flame emission spectroscopy, or inductively coupled plasma atomic emission spectroscopy (ICP-AES).

The present subject matter is directed to a growing medium and method of use. The growing medium comprises coconut coir. The coconut coir has a specific range of electrolytes, particularly sodium, potassium, and calcium. The values of these elements is confirmed in the coconut coir through qualitative and quantitative measurements, such as photoelectric flame photometry, spectroscopy, or inductively coupled plasma atomic emission spectroscopy.

The present disclosure provides a soil amendment composition for solubilizing silicate in soil. The soil amendment includes at least one a microorganism capable of solubilizing the silicate, and may further comprise at least one nutrient, binding agent or silica. This combination facilitates a slow release of silicate into the soil. Addition of the soil amendment composition encourages growth of plants, such as Cannabis plants; and may enable plants to better withstand drought, frost winds and other environmental conditions. The present disclosure provides a soil amendment for providing bioavailable silicon that may be applied infrequently.

Techniques for reducing water evaporation from soil and other fresh water mediums, such as open bodies of water are provided that include forming a hydrophobic capillary layer thereon. The hydrophobic capillary layer includes a plurality of hydrophobic capillaries configured to push or otherwise direct water provided in the soil or the fresh water medium downward or back into the soil or the fresh water medium while allowing water vapor, oxygen and other gases to pass. This increases the diffusion resistance for the water molecules to pass through the hydrophobic capillary layer and thereby reduces the rate of evaporation of water from the underlying soil or fresh water medium. In an aspect, the hydrophobic capillary layer is formed via soil particles respectively coated with a hydrophobic coating. The reduction to water evaporation from a soil layer covered with the hydrophobic capillary layer results in an increased amount of water retention in the soil layer, which in turn enhances plant growth while conserving water.