And when it comes to arsenic, we have to mention centipede grass.

Removing heavy metal pollution such as arsenic and mercury has long puzzled scientists.

However, scientists later discovered a strange phenomenon: in some arsenic-polluted land and water bodies, most of the plants have died, but the centipede grass fern is unharmed.

After laboratory tests, scientists found that centipede grass not only has a strong super-adsorption capacity for arsenic, but also has a certain effect on the adsorption of other heavy metals.

After testing, centipede grass is enriched with arsenic two or three hundred thousand times higher than ordinary plants, it is enriched with a large number of toxic substances, and it is an arsenic-resistant plant.

If centipede grass is used to extract arsenic and other heavy metal pollutants in the soil, and then harvested and incinerate, the amount of toxic waste gas will be greatly reduced, and the incinerated ash can also be turned into mineral resources for smelting.

Ideally, the arsenic content in plants can be as high as about 20%, which is equivalent to a mineral resource.

And as far as Zhou Wen knows, there are already scientists studying "cultivated metals".

Alan Baker, a botanist at the University of Melbourne, for example, is putting this model into practice.

He planted super-rich nickel trees on 50 acres of nickel contaminated area, and when the bark is cut, a blue-green liquid flows out like gums, and 1/4 of it is nickel, which is higher than the ore content of any nickel smelter.

The purified metal is then extracted and sold.

In addition, the smelter has to pay him a high environmental remediation fee.

……

Zhou Wen stepped forward to check on the super-enriched arsenic plants.

The black youth followed, pointing to the roots of some of the needles he had cut from the middle, and said: "The last time I cut down these bushes, the slurry on them got on my hands, and I felt very uncomfortable, and then I went home, and soon my hands became like this." ”

Zhou Wen studied it carefully.

It is an ugly shrub known locally as the "conifer" with spiky barbs and is commonly found in rainforests.

Despite being a shrub, its root system is quite developed, belonging to a deep-rooted plant, and its taproot can go deeper than 5 meters underground, and some can even reach 10 meters.

So if it is not surprising, there should be arsenic deposits underground, otherwise it would not be possible to explain the area where the super-rich arsenic plants grow, but the other plants are not affected.

There are more than a dozen coniferous trees here.

Zhou Wen and his bodyguards asked for a dagger and cut it on the stalk of the coniferous tree.

Conifer: "Knock you...... It hurts me to death. ”

Zhou Wen: "Shut up, I'm collecting samples!"

The coniferous tree was apparently frightened, and with its intelligence, it was apparently incomprehensible why primates could understand its language.

And at this moment, a milky white liquid flowed out of its severed stalk, and it fell to the ground "ticking".

While collecting samples, Zhou Wen asked, "By the way, is there an arsenic mine underground?"

Coniferous trees do not speak.

Zhou Wen "clicked" and broke a branch.

Conifer: "Knock you...... It hurts me to death. ”

Zhou Wen: "Is there an arsenic mine underground? If you don't say anything more, I'll uproot you later." ”

The needles shivered.

Zhou Wen: "Is there any?"

Conifer: "Yes!"

Zhou Wen: "Then I won't pull you out today." ”

After Zhou Wen finished collecting the sample, he turned his head and asked, "Where is there such a similar plant?"

The old black man who had moderate arsenic poisoning pointed to the east and said a few words, and the young black translator said, "He said that there was still in the woods to the east, and that he was poisoned there." ”

"How far is it?"

"A mile or so. ”

Zhou Wen looked at the sky, it was still too late, and said, "Let's go, take me over to have a look." ”

The black youth was lazy and reluctant to take him there, including the locals.

Zhou Wen said to the black youth: "You take me over to see, and I will go back and help you heal your hands." I'm sure you've also gone to the hospital for treatment, this kind of metal poisoning is very difficult to cure, no one can cure it except me!"

The black youth consulted with everyone.

These people are all relatives who have been close to each other, and when they heard that Zhou Wen could help the young man and the old man treat the diseases on their hands, they all agreed.

Zhou Wen led a security guard to follow everyone towards the thorny woods, while the rest stayed where they were to watch the vehicle.

There was a small road that, according to the young black man who led the way, had been trodden by South Africans who had come to their village to steal baobab trees, and it was part of Botswana territory.

One mile, which is equal to about 1,600 meters.

It took nearly an hour to walk through the rugged, thorny jungle to get there.

"Now, here it is. The black youth said, pointing to a dark bush in front of him.

Zhou Wen stepped forward to take a look, it was really.

There are a lot of coniferous trees here, and there are twenty or thirty of them.

Zhou Wen collected samples in turn on several of the thickest coniferous trees.

Of course, every time I was scolded by the tree.

Zhou Wen asked the same question to the last coniferous tree to be collected, "Is there arsenic mine underground?"

Without waiting for the coniferous tree to answer, he first broke a branch with a "click", causing the coniferous tree to squeak in pain.

Conifer: "Why did you break my hand?"

Zhou Wen: "Do you understand how to kill chickens and monkeys? I'm afraid you won't say it, so I'll break one for you first." ”

Coniki: "But I was about to tell you. ”

Zhou Wen: "...... I'm sorry about that. ”

The conifer was sad for a while...... Zhou Wen could feel its sadness, a very obscure plant language.

Later, the oldest conifer tree told Zhou Wen that it had a lot of arsenic under its feet.

Zhou Wen thanked it and then returned.

Before the sun set, they came out of the forest.

Zhou Wen used biological antidotes to help two people who were poisoned by arsenic detoxify.

"Because this is heavy metal poisoning, it requires a recovery period, about 6~10 days. ”

The black youth moved his palms and said happily, "I feel better." ”

Zhou Wen nodded and handed over a business card, "That's good! This is my business card, if you have any problems when you go back, just call me." ”

Of course, there is a reason why Zhou Wen is so enthusiastic.

The first is the super-enriched arsenic needle tree, which is very rare, and the root system is so well developed, whether it is used to control heavy metal pollution or to extract underground arsenic mines, it can be called a "cash cow".

The second is arsenic mines underground.

Arsenic is very valuable, the market price of 6N is about 1000 yuan/kg, and the market price of 7N has reached about 2000 yuan/kg.

Of course, this is also very polluting to the environment, and if it is developed, the investment is also very large.

But it's good news.

Because of this, it is necessary to establish a good relationship with these locals in advance to facilitate some later operations.

After eating a special local dinner, Zhou Wen and the others rushed to the hotel in the city overnight to rest.

……

……

Nine o'clock the next morning.

Lin Gaoxuan waited for an afternoon and an evening, but Zhou Wen didn't take the initiative to come over, but Tang Wannian's call came.

"Okay, I got it......"

Lin Gaoxuan hung up the phone with a dark face.

The next moment, a head came out of the air conditioner's quilt, it was Shen Yujie, with a peach blossom on her face, and a curved hair on the corner of her mouth, and asked with a smile: "How is it, is he coming?"

Lin Gaoxuan secretly hated: "This bastard, who has been abroad for two months, has treated his brain badly, and he doesn't listen to anyone's words." ”

Shen Yujie asked, "What should I do then?"

Lin Gaoxuan's face was cloudy and he thought for a while, and finally found that there was no way to deal with the other party for the time being except for calling in person.

"Let him be proud for a while, and then when I go back to the country, I'll see how I clean him up!" said Lin Gaoxuan, who pressed Shen Yujie's head into the quilt, took out the phone and dialed a number.

The phone was quickly connected, and Zhou Wen's voice came from inside, "Hey, hello, who is it?"

Lin Gaoxuan sneered and said, "Doctor Zhou is really a noble person, so many people can't please you, and I want to call you in person, you are very good." ”

Zhou Wen: "Who are you?"

Lin Gaoxuan felt that he had said everything he had said, and it was impossible for the other party not to know who he was, it was clearly deliberate, and said coldly: "You really don't know who I am?"

Zhou Wen: "Nonsense~ If you don't say it, how do I know who you are?"

Lin Gaoxuan: "...... I'm Lin Gaoxuan. ”

Zhou Wen: "I don't know! ”

"Doodoo ......"