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| �ж��ؽ��ٌ��h(hu��n)���ć������{����u�ɞ�ȫ���Ԇ��},�����ؾC���˽�������(n��i)���ؽ�����Ⱦ̎�����g���о��c�Mչ�����˸��M���y(t��ng)�Ļ��W,������������,�����N���r���������ܵ������������Ϳ��x�����ؽ��ٲ����������о��Ľ��c,���e���S�����＼�g�İl(f��)չ,�����ù��ܾ���ֲ��̎�����ؽ�����Ⱦ��ȡ���ஔ��Ч�����ڹ��I(y��)���M���ˌ��H����,���о��Ͱl(f��)չ������Ȼ������,���ؽ��ٲ����������＼�g���ӏ���N���g�ľC�ϑ���,���������ؽ�����Ⱦ����Ч;��,�� |
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| The serious threat of poisonous heavy metal pollution to the environment becomes a global problem. The researches and developments on heavy metal pollution treatment at home and abroad are summarized in this paper. Besides the improved traditional chemical and physical methods, the low-priced, high adsorption properties of adsorbent and new style heavy metal chelating agents are the focus of research.With the development of biological technology, functional bacteria and plants are more efficient in heavy metal treatment and are pratically used in industries. Combined application of various technologies is the potent way to heavy metal treatment based on advances of new-style natural adsorbents, heavy metal chelating agents and biological technology. |
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