大好消息

(^.^)

昨天我看新闻
我国科学家挑查，
发现蚯蚓昆虫
会吃我们所制造的垃圾
她又提到1kg的昆虫，吃1kg的食物可以消化出1kg的肥料
真的一举三得！！！
可喜可贺！！！我国的一大发现！

KyleMichelleGo

(^.^) 于 8-6-2004 05:53 PM  说 :
昨天我看新闻
我国科学家挑查，
发现蚯蚓昆虫
会吃我们所制造的垃圾
她又提到1kg的昆虫，吃1kg的食物可以消化出1kg的肥料
真的一举三得！！！
可喜可贺！！！我国的一大发现！

啊？真的吗？哪方面的消息？

真是太妙了。总觉得大马的科学家正慢慢的起步了！以前什么新发现都没有！可能有我也不知道了！

yaoxin

我看只是指特定的垃圾吧﹖我不相信昆虫可以消化工業廢料﹐如重金屬等等。

铁蛋

(^.^) 于 8-6-2004 05:53 PM  说 :
昨天我看新闻
我国科学家挑查，
发现蚯蚓昆虫
会吃我们所制造的垃圾
她又提到1kg的昆虫，吃1kg的食物可以消化出1kg的肥料
真的一举三得！！！
可喜可贺！！！我国的一大发现！

是吗。。。小弟有所保留。。。研究报告有发表在权威性的科研杂志吗， 很多时候有些科学家只是要哗众取宠。

＂。。。会吃我们所制造的垃圾。。。＂ 大概是指有机垃圾吧。但这又有什么稀奇？ 连塑胶无机废物都能消化的话， 应该才是重大发现. 解决世界垃圾问题，足以得 Nobel Prize.

KyleMichelleGo

铁蛋 于 8-6-2004 06:05 PM  说 :


是吗。。。小弟有所保留。。。研究报告有发表在权威性的科研杂志吗， 很多时候有些科学家只是要哗众取宠。

＂。。。会吃我们所制造的垃圾。。。＂ 大概是指有机垃圾吧。但这又有什么稀奇？ 连塑胶无机废物 ...

咦，你说到塑胶我也好像有点印象。不知道是近期还是早前的新闻说到塑胶可以被细菌分解！

铁蛋

KyleMichelleGo 于 8-6-2004 06:12 PM  说 :

咦，你说到塑胶我也好像有点印象。不知道是近期还是早前的新闻说到塑胶可以被细菌分解！

应该是有这方面的研究。。。可是应该不简单， 因为这些细菌若逃到外界，开始分解有用的塑胶又会制造问题。。。

yaoxin

KyleMichelleGo 于 8-6-2004 18:12  说 :

咦，你说到塑胶我也好像有点印象。不知道是近期还是早前的新闻说到塑胶可以被细菌分解！

细菌分解塑胶的消息我沒看過﹐但是利用細菌分解重金屬已經有研究在進行着了。

什麼細菌可以分解重金屬？？

foxngn

虽然是真的，不过我觉得垃圾还是会那么多

yaoxin

beyond_4896 于 9-6-2004 02:20  说 :
什麼細菌可以分解重金屬？？

Thiobacillus sp., Leptospirillum sp.

我是在一個講座會上聽過,以下是網上找到的參考﹕

Thiobacillus: A Microbial Miner
For thousands of years, refiners have been extracting copper from low-grade copper ore by a process called leaching. Until 1957, however, nobody realized that the extraction would be impossible without the bacterium Thiobacillus ferrooxidans, which thrives in acidic environments such as mining sites. Thanks to this microbe, millions of tons of copper are recovered from billions of tons of low-grade ore every year.

Thiobacillus ferrooxidans is one of several species of chemoautotrophic bacteria, which are becoming increasingly important in the extraction of a variety of metals. The chemoautotrophs obtain their energy from the oxidation of inorganic substances (iron and sulfur, in the case of T. ferrooxidans). This allows them to stimulate reactions involving minerals that are unaffected by, and may even be poisonous to, other bacteria. Moreover, chemoautotrophic bacteria thrive in the absence of organic matter because they extract their carbon dioxide directly from the carbon dioxide in the atmosphere.

The bacteria are naturally present in the leaching solution prepared at the mining site. The refiners grind the copper-bearing rock and heap it into a pit, called a dump. Then they pour water mixed with sulfuric acid (the leach solution) through the dump. When the leach solution runs out through the bottom of the dump, it contains copper sulfate (CuSO4) in solution. The refiners then add metallic iron to the leach solution. The iron reacts with the copper sulfate to release metallic copper. (See figure 1).

Thiobacillus frees copper from the ore in a variety of ways. Most commonly, the bacillus reacts with iron and sulfur compounds that are in the rock. The rock is likely to contain compounds of iron and sulfur, such as iron pyrite (FeS2). As the leach solution trickles down through the ore-bearing rock, T. ferrooxidans oxidizes the Fe2+ ion by removing an electron from it. This turns the ferrous ion into a ferric ion, Fe(III). The sulfur that was in the FeS molecule can now combine with hydrogen ions and oxygen molecules to form sulfuric acid (H2SO4).

In addition to the iron pyrite, the ore contains compounds of copper and sulfur, such as CuS. The ferric ion oxidizes the monovalent copper ion, Cu(I) to create a divalent copper ion, Cu(II), which then combines with the sulfate ion, contributed by the sulfuric acid, to form copper sulfate (CuSO4).

Now the leach solution has copper sulfate dissolved in it, the refiners add metallic iron. The iron reacts with the copper sulfate to form ferrous sulfate and metallic copper. Thiobacillus can now reoxidize the ferrous ion to ferric ion.

The mining industry has begin to use chemoautotrophic bacteria to retrieve other elements that are present in low concentrations in ores. Thiobacillus is being used to extract cobalt at the Idaho National Laboratory, and U.S. Gold Corporation uses Thiobacillus to free gold from rock.

Microbial mining offers a possible solution to another problem that threatens modern industrial societies-pollution of the soil and groundwater by unextracted metallic ions in waste water. Chemoautotrophic bacteria that can take up and accumulate toxic metal ions in their cells may be useful in removing metal pollutants in waste water.

fyon25

楼上的，那条虫的名字好长，难怪那么利害。

human^6^

怕他吃完垃圾吃人类阿！！！！

yaoxin

fyon25 于 15-6-2004 11:55  说 :
楼上的，那条虫的名字好长，难怪那么利害。

再長也只不過是人類給它命名而已﹐人類也蠻厲害嘛。

yaoxin

human^6^ 于 15-6-2004 23:42  说 :
怕他吃完垃圾吃人类阿！！！！

有可能﹐如果有人類變成”垃圾“。

ahcheong

的确是个好消息，一举三得

雨天之魂

yaoxin 于 13-6-2004 21:42  说 :



Thiobacillus sp., Leptospirillum sp.

我是在一個講座會上聽過,以下是網上找到的參考﹕

Thiobacillus: A Microbial Miner
For thousands of years, refiners have been extracting copper from low ...

这两种细菌都有一个共同点...,
如同 green plant 得进行光合作用(photosynthesis),也就是用光的力量来制造食物,

这些细菌进行 chemosynthesis(不知道中文叫什),也就是用化学过程中释放的力量来制造食物.

Thiobacillus 是无色的 sulphur bacteria.
These bacteria make use of energy liberated from oxidative reactions of sulphur to sulphuric acid, to synthesis their food.

Leptospirillum 是 iron bacteria.
These bacteria make use of energy liberated from oxidative reactions of iron (II) to iron (III).

坛主抱歉, 真的是不知道有些 term 该怎么用中文说. 一半一半的又很奇怪..就一次过了..
莫怪莫怪...

[ Last edited by 雨天之魂 on 4-9-2004 at 01:26 AM ]

少宗_东靖

这或许是个好消息。。。
但是。。。
垃圾不会有减少的。。。

RENOMA

人类这样会制造垃圾
在怎么样也清不了的。。。
看看自己家一天有多少垃圾啊。。。

再多的细菌，也没办法吃掉人脑中的垃圾。。。。

紫色的黑蝴蝶

这是个天大的好消息，可是如果人类继续制造垃圾，那即使有整个地球那么多的昆虫又如何？人类应该反省一下，不要再胡乱制造垃圾。。