Advances in Earth Science ›› 2001, Vol. 16 ›› Issue (3): 387-393. doi: 10.11867/j.issn.1001-8166.2001.03.0387

• Articles • Previous Articles     Next Articles

RESEARCH PROGRESS IN GEOCHEMICAL ACTIVITIES AND BIOAVAILABILITY OF HEAVY METALS IN RHIZOSPHERE ENVIRONMENT

BI Chun-juan,CHEN Zhen-lou,ZHENG Xiang-min, XU Shi-yuan   

  1. Department of Geography,East China Normal University,Shanghai200062,China
  • Received:2000-08-07 Revised:2000-11-27 Online:2001-06-01 Published:2001-06-01

BI Chun-juan,CHEN Zhen-lou,ZHENG Xiang-min, XU Shi-yuan. RESEARCH PROGRESS IN GEOCHEMICAL ACTIVITIES AND BIOAVAILABILITY OF HEAVY METALS IN RHIZOSPHERE ENVIRONMENT[J]. Advances in Earth Science, 2001, 16(3): 387-393.

Rhizosphere is the micro region environment influenced by plant roots and its activities in soil or coastal sediments. Due to its special physical, chemical and biological characteristics, the distribution, accumulation and bioavailability of heavy metals in rhizosphere soil or sediments differ from the non rhizosphere. On one hand, heavy metals in plants can be accumulated through the food chain step by step, which would threat the health of mankind and bring great loess to the society economy; on the other hand, the adsorption of heavy metals in plants can cut down the heavy metal concentration of heavy metal contaminated soils or sediments and reduce its environmental endangers. In this paper, some main progresses in geochemical activities and bioavailability of heavy metals in rhizosphere environment during the latest ten years at home and abroad are reviewed, including the distribution and accumulation of heavy metals in rhizosphere, the geochemical forms, bioavailability of heavy metals in rhizosphere, main factors influencing the activities and bioavailability of heavy metals in rhizosphere ( including tempreture, Eh and dissolved oxygen, pH, root exudates and microbe), the adjusting and control of heavy metal adsorption, accumulation, exclusion and fixation processes in rhizosphere, the screening and cultivating of heavy metal tolerant plant. The existing problems and striving direction are also pointed out. 

No related articles found!
Viewed
Full text


Abstract