By E. A. Woolson (Eds.)
content material: evaluate of arsenical insecticides / S.A. Peoples --
The decision of lines of arsenic : a assessment / Yair Talmi and Cyrus Feldman --
habit and phototoxicity of inorganic arsenicals in soils / L.M. Walsh and D.R. Keeney --
habit of organoarsenicals in vegetation and soils / A.E. Hiltbold --
Arsenicals in animal feeds and wastes / C.C. Calvert --
Microbiological methylation of arsenic / Donald P. Cox --
Bioaccumulation of arsenicals / E.A. Woolson --
Arsenic within the setting / Robert S. Braman --
A proposed arsenic cycle in an agronomic environment / Gary R. Sandberg and Ingrid okay. Allen --
Simulation of the mobility of arsenic compounds within the atmosphere : a southern Texas case examine / John E. Stolzenberg.
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Content material: evaluate of arsenical insecticides / S. A. Peoples -- The decision of lines of arsenic : a assessment / Yair Talmi and Cyrus Feldman -- habit and phototoxicity of inorganic arsenicals in soils / L. M. Walsh and D. R. Keeney -- habit of organoarsenicals in crops and soils / A. E. Hiltbold -- Arsenicals in animal feeds and wastes / C.
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Extra info for Arsenical Pesticides
Deep plowing t o d i l u t e the As concentrat i o n o f the surface s o i l and expose As t o more s i t e s f o r f i x a t i o n would seem t o be one o f the most economical methods o f decreasing t o x i c i t y . T h i s approach was suggested by McLean e t a l . (53) and A l b e r t (31). Vincent (27) a l s o suggested growing t o l e r a n t cover crops such as r y e or Sudan grass. When plowed under, these crops reduced subsequent As t o x i c i t y . Apparently As t o x i c i t y t o f r u i t t r e e s i s involved with induced Zn d e f i c i e n c y , as f o l i a r a p p l i c a t i o n o f zinc s u l f a t e or Zn chelates w i l l overcome As t o x i c i t y to peach t r e e s (42, 60).
Greenhouse experiments were a l s o conducted by Deuel and Swoboda (29) i n which experimentally t r e a t e d s o i l s were used to r e l a t e l e v e l s o f As extracted from the s o i l s with y i e l d s o f c o t ton or soybeans. ; ACS Symposium Series; American Chemical Society: Washington, DC, 1975. WALSH AND KEENEY Inorganic Arsenicals in Soil 24QE 200 PLAINFIELD--BRAY PI 160- 120 80 • WAUPUN—BRAY PI PLA INFIELO —NH4OAC 40 WAUPUN—NH4OAC EQUILIBRATION TIME, MONTHS Soil Science Society of America, Proceedings Figure 1.
0). He suggested t h a t b a c t e r i a l o x i d a t i o n o f a r s e n i t e i n v o l v e d an adaptive a r s e n i t e dehydrogenase system. 7 capable o f c a r r y i n g out t h i s r e a c t i o n were r e a d i l y i s o l a t e d . Deuel and Swoboda (14) obtained experimental evidence t h a t a r s e n i t e o x i d a t i o n occurs a t about +100 mV. This work shows t h a t a r s e n i t e w i l l be o x i d i z e d i n aerated s o i l s , where the o x i d a t i o n r e d u c t i o n p o t e n t i a l commonly i s i n the range o f +400 t o 600 mV.