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skywalkerMJľ³æ (СÓÐÃûÆø)
Nano Transport
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non-specifically-bound specifically-bound amorphous hydrous oxidebound crystalline hydrous oxide-bound ÒÔÉÏËĸö´Ê·Òë³ÉÖÐÎĸÃÈçºÎ±íÊö£¬ÒÔÏÂÊÇÔÎÄ£º The adopted SEP presented here provides more dependable information on five fractions of As in soils. These operationally defined fractions can represent non-specifically-bound, specifically-bound, amorphous hydrous oxidebound, crystalline hydrous oxide-bound and the residual. Within the inherent limitations of chemical fractionation, the reagents of the adopted SEP are fairly specific and selective for these forms of As. The adopted SEP is simple to execute in routine soil analysis and targets the most abundant environmentally important forms of As. Fraction 1, employed as single extractant, has been shown to correlate well with As in field-collected soil solutions and hence can be used for predicting solute As [35]. Such information is useful in risk assessment of As leaching to the groundwater and of the readily bioavailable fraction. Fractions 2¨C4 may provide information on potential lability of As from different solid phases as a result of soil remediation or alteration in soil (e.g. redox, pH) and environmental factors. |
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qjluo
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sltmac(½ð±Ò+2): лл½»Á÷~~ 2011-05-04 11:02:43
skywalkerMJ(½ð±Ò+2, ·ÒëEPI+1): 2011-05-04 12:55:16
sltmac(½ð±Ò+2): лл½»Á÷~~ 2011-05-04 11:02:43
skywalkerMJ(½ð±Ò+2, ·ÒëEPI+1): 2011-05-04 12:55:16
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non-specifically-bound£º·ÇÌØÒìÐÔ½áºÏ£¬±¾ÎÄÖÐÖ¸·ÇÌØÒìÐÔ½áºÏ״̬ specifically-bound£ºÌØÒìÐÔ½áºÏ£¬±¾ÎÄÖиÃÖ¸·ÇÌØÒìÐÔ½áºÏ״̬ amorphous hydrous oxidebound£º±¾ÎÄÖÐÖ¸ÎÞ¶¨ÐÎÇâÑõ»¯½áºÏ״̬ crystalline hydrous oxide-bound £º±¾ÎÄÖÐÖ¸¾§ÌåÇâÑõ»¯½áºÏ״̬ |
3Â¥2011-05-03 19:53:28
Cindy_ѧ
¾èÖú¹ó±ö (ÕýʽдÊÖ)
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Mally89(½ð±Ò+1): ¹ÄÀøÐ³棡~ 2011-05-03 16:56:13
Mally89(½ð±Ò+1): ¹ÄÀøÐ³棡~ 2011-05-03 16:56:13
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non-specifically-bound specifically-bound amorphous hydrous oxidebound crystalline hydrous oxide-bound ³£¹æÐÔÕ³×Å ·Ç³£ÐÔճ׊ˮ̬Ñõ»¯Õ³×Š͸Ã÷Ë®×´Ñõ»¯Õ³×ŠϣÍûÄÜÓÐËù°ïÖú£¡ |
2Â¥2011-05-03 16:02:26













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