It is estimated that the cadmium content of the soil can be reduced by at least 50% after one year of ramie planting, and after two years, the average cadmium content in the soil can meet the requirements of the "Soil Environmental Quality Standards" even in the soil with heavy metal pollution, and ordinary crops can be safely grown.

If you don't understand this meaning, let's make a simple comparison: the average super-enriched plant grows slowly and has very little biomass, so the amount of heavy metals that can be absorbed per unit of time is limited to a low level. Theoretically, it would take about 100 years to "suck out" all the cadmium in heavily polluted land.

One hundred years and two years, what a staggering difference!

Therefore, this not only blinded the eyes of Song, the chief of the technical department of the Jiangtong Group, but also blinded the eyes of the top management of the Jiangtong Group; moreover, this news quickly spread in a small area and attracted the attention of many non-ferrous metal giants, and most of them were state-owned enterprises.

Whether it is mineral mining or non-ferrous metal processing plants, it is difficult for state-owned enterprises to escape environmental responsibility. On the one hand, there is the supervision from above, and on the other hand, there are more stringent demands from the public.

Paint the mine with green paint, and simply cover the soil with potted seedlings directly on the sand field to "spray green" the mountain in the mining area...... Some private enterprises have adopted a trick of "camouflage" to deal with environmental inspections, and state-owned enterprises had better not think about it.

For example, the most polluted industrial land and mining land are currently the most polluted, and mine restoration is a routine operation, covered up with soil, and the investment is not very large, but the unavoidable heavy metal pollution is undoubtedly scratching the head.

At present, all the methods that can "pull" excess heavy metals out of the soil require huge investment, and the results are not good; without state financial support, even state-owned mining giants will have too much burden.

And Jiagu's phytoremediation technology, not to mention the excellent effect, it seems that the investment should not be large.

Seeing this, more and more representatives of state-owned mining enterprises have appeared in the heavy metal pollution control pilot area of Jiangtong Group.

The larger the mining state-owned enterprises, the more mining areas they have in their hands, and the greater the interest in phytoremediation technology.

From the point of view of state-owned enterprises, the most outstanding results are, of course, higher and higher turnover. However, in addition, in the face of the country's increasing attention to environmental protection, the remediation of mining areas and polluted soil is also one of the great highlights.

But if it comes to tackling contaminated soil on a large scale, current mining companies don't have a good solution.

Jiagu Group has, and the major mining giants naturally want to know whether it is true or not. Therefore, in addition to the host Jiangtong Group, Minmetals Group, China Mining Group, China Aluminum Group, Capital Mining and other companies have also sent representatives or observers.

At this time, it is not Liu Xu who can preside over the scene. Qi Zheng quietly arrived at the scene to deal with a group of visiting mining tycoons.

......

As the host, Mr. Lei of Jiangtong Group personally came forward, which is not only an emphasis on Qi Zheng, but also a "deterrent" to other peers.

In the test field, everyone watched as the Jiagu team applied organic fertilizer to the ramie, while some technicians brought in by the mining tycoons were carefully testing the metal content of the ramie's roots.

Mr. Lei smiled: "Qi always gave me a big surprise!"

Qi Zheng smiled but said nothing.

Mr. Lei squinted his eyes and looked around at the other peers around him, and asked, "Can this ramie maintain such an adsorption efficiency all the time?"

Qi Zheng shook his head slightly and said: "In the early stage of high concentration of heavy metals, the efficiency is relatively high; ”

Mr. Lei nodded, and then asked the most concerned question: "How much is the cost of phytoremediation in Jiagu?"

Generally speaking, mining area management and restoration projects are not small investments, and they often start with tens of millions. The effect of Jiagu's phytoremediation technology is amazing, but I don't know how much investment will be made, so I can't help but listen intently.

Qi Zheng smiled and said, "The cost is actually okay. ”

"You should know that ramie has been an important source of textile fibre in the past, also known as 'Chinese grass'. And our ramie variety has the best fiber quality and is a high-quality raw material for making raw hemp fiber clothing. ”

"The most perfect thing is that the cadmium-rich part of 'Golden Ramie No. 1' is the root, and the leaves and stems are almost unaffected, and the economic value of the roots is not large, and it can be used to 'sequester' cadmium; ”

"In a sense, 'Golden Ramie No. 1' solves the contradiction between economy and environment faced by soil remediation, and achieves both high economic value and land restoration. ”

Mr. Lei's eyes have a tendency to shine: "It can be called a perfect cadmium pollution control plant!"

Qi Zheng smiled and said, "I don't dare to take this seriously." In fact, we do not have a proper solution for the root treatment of ramie after it is enriched with heavy metals......"

The burned ash is used as special garbage to dig deep and landfill, or transported to the tailings pond of the corresponding heavy metal mining area to store with the tailings slag, which may cause secondary pollution......

Of course, Kaya still prefers to re-extract and reuse.

Mr. Lei laughed heartily: "What is this? It is ideal to be able to smoothly pull heavy metals out of the soil!"

The representatives of the mining giants nodded silently.

Subsequently, the vice president of Minmetals Group asked: "Mr. Qi, is your phytoremediation technology effective against other heavy metal pollution?"

Mr. Qi said calmly: "Ramie only plays a role in cadmium pollution, but we also have a cultivated super-enriched plant variety Southeast Sedum, which has several treatment functions for cadmium, zinc, and lead, and a centipede grass variety, which has strong arsenic enrichment characteristics......

"Compared to the adsorption efficiency of 'Golden Ramie No. 1'?"

"The southeast sedum is slightly inferior, but it is also far superior to ordinary super-enriched plants, and the efficiency of centipede grass is comparable to that of 'Golden Ramie No. 1'. ”

"Is there an application? I mean a large-scale application. ”

"Of course. "Qi Zheng is here to show off, where will it be hidden," two years ago, in Heshun County, Jin Province, we planted Southeast Sedum on a large scale to control heavy metal pollution and reclaim abandoned mining areas, which were once 'scarred' and have now become a pasture with lush pastures. ”

"As for centipede grass, because it relies on spores to reproduce, we still need to carry out a lot of further work to shorten the seedling breeding time, and establish a large-scale rapid seedling breeding technology ...... for centipede grass."

There was silence.

There is data, there are applications, and this proves that there is potential for large-scale rollout.

Mr. Lei and others don't care who made the phytoremediation technology, whether Jiagu made it or someone else's it, as long as it is easy to use, it doesn't matter if you pay a little more money to buy these mining giants, the annual funds for environmental management in the mining area are not astronomical, but they add up to absolutely considerable.

But I also know that Jiagu's production capacity is limited. So the key is who can come out on top and add a dazzling political achievement to their resume.

Mr. Lei was the first to speak: "Mr. Qi, Jiangtong Group's soil remediation project in the mining area of Gaolan County, I want to talk to you about ......"

Not to be outdone, the vice president of Minmetals Group: "Mr. Qi, we also have a 10-million-level project in Jin Province......

"Mr. Qi ......"

Looking at the mining tycoons vying for a conversation, Qi Zheng smiled.

The heavy metal pollution in the mining area is the "gold mine" of Jiagu, which uses other people's funds to develop its own technology and industry, which is simply unpleasant.

And at this moment, a hurried voice came from behind: "Mr. Qi, wait...... Please think about our project first!"

......