An aqueous modified acid composition for industrial activities, said composition comprising: an alkanolamine and strong acid in a molar ratio of not less than 1:15, preferably not less than 1:10; it can also further comprise a metal iodide or iodate. Said composition demonstrates advantages over known conventional acids and modified acids.

The present invention provides a remediation method for degradation of cadmium in soil. The specific steps are as follows: step 1, determining the content of cadmium in the soil; step 2, crushing and sieving soil from a soil surface, and weighing; step 3, wetting the soil, and removing part of cadmium in the soil to obtain semi-remediated soil; step 4, mixing the semi-remediated soil with a remediation agent, and allowing to stand to obtain improved soil; and step 5, planting Bidens pilosa in the improved soil, and when a growing season is finished, uprooting, and ashing to obtain finished soil. The present invention utilizes anode and cathodes and a remediation agent to treat the cadmium contaminated soil, and plants Bidens pilosa in the soil to achieve a joint effect of electrodynamic remediation, chemical remediation, microbial remediation and phytoremediation to remediate the cadmium contaminated soil.

The present invention provides a remediation method for degradation of cadmium in soil. The specific steps are as follows: step 1, determining the content of cadmium in the soil; step 2, crushing and sieving soil from a soil surface, and weighing; step 3, wetting the soil, and removing part of cadmium in the soil to obtain semi-remediated soil; step 4, mixing the semi-remediated soil with a remediation agent, and allowing to stand to obtain improved soil; and step 5, planting Bidens pilosa in the improved soil, and when a growing season is finished, uprooting, and ashing to obtain finished soil. The present invention utilizes anode and cathodes and a remediation agent to treat the cadmium contaminated soil, and plants Bidens pilosa in the soil to achieve a joint effect of electrodynamic remediation, chemical remediation, microbial remediation and phytoremediation to remediate the cadmium contaminated soil.

Disclosed is a biogas residue-based in situ and ectopic coupled detoxification method for hexavalent chromium site and soil remediation agent. The method is applied to chromium-containing soil by formulating biogas residue, a carbon source and a sulfate into said soil remediation agent. Special construction and maintenance methods are adopted to achieve effective reduction of hexavalent chromium in deep contaminated soil. Therefore, the biogas residue-based in situ and ectopic coupled detoxification method for hexavalent chromium-containing sites cannot only be used to remediate chromium-containing sites deep in depth at a low cost and high efficiency, but also achieve recycled utilization of waste by treating waste with one another, thereby possessing significant value in promotion and practice.

Disclosed is a biogas residue-based in situ and ectopic coupled detoxification method for hexavalent chromium site and soil remediation agent. The method is applied to chromium-containing soil by formulating biogas residue, a carbon source and a sulfate into said soil remediation agent. Special construction and maintenance methods are adopted to achieve effective reduction of hexavalent chromium in deep contaminated soil. Therefore, the biogas residue-based in situ and ectopic coupled detoxification method for hexavalent chromium-containing sites cannot only be used to remediate chromium-containing sites deep in depth at a low cost and high efficiency, but also achieve recycled utilization of waste by treating waste with one another, thereby possessing significant value in promotion and practice.

An aqueous modified acid composition for industrial activities, said composition comprising: an alkanolamine and strong acid in a molar ratio of not less than 1:15, preferably not less than 1:10; it can also further comprise a metal iodide or iodate. Said composition demonstrates advantages over known conventional acids and modified acids.

An aqueous modified acid composition for industrial activities, said composition comprising: an alkanolamine and strong acid in a molar ratio of not less than 1:15, preferably not less than 1:10; it can also further comprise a metal iodide or iodate. Said composition demonstrates advantages over known conventional acids and modified acids.

The present disclosure relates to aqueous gelling systems comprising an encapsulated polymerization accelerator with water soluble or dispersable monomers comprising acrylated or methacrylated polyethylene and/or polyoxypropylene monomers and a polymerization initiator dispersed in said monomers, useful i.a. for sealing subterranean environments or consolidation of a soil or sealing of a subterranean structure.

The present disclosure relates to aqueous gelling systems comprising an encapsulated polymerization accelerator with water soluble or dispersable monomers comprising acrylated or methacrylated polyethylene and/or polyoxypropylene monomers and a polymerization initiator dispersed in said monomers, useful i.a. for sealing subterranean environments or consolidation of a soil or sealing of a subterranean structure.

Disclosed is an in-situ detoxification method for a heavily contaminated site by hexavalent chromium. The method includes injecting a chemical reducing agent into a site heavily contaminated with hexavalent chromium, and injecting a chromium soil remediation microbial agent into the site after 0-10 days. The in-situ detoxification method includes: first, in-situ injecting the chemical reducing agent into the soil, preliminarily reducing high-concentration hexavalent chromium such that the hexavalent chromium of high concentration has no toxic effect on the subsequent ecological microbial agent, then in-situ injecting the ecological microbial agent prepared from biogas residue, a carbon source and sulfate into the chromium-containing soil under pressure, and forming a large-scale reducing buffer zone containing sulfate-reducing bacteria and sulfide in a special maintenance manner in the subsurface soil of the site to reduce the hexavalent chromium continuously and effectively.