WATER-QUALITY AND TRACE-ELEMENT EVAPOCONCENTRATION IN EVAPORATION PONDS FOR AGRICULTURAL WASTE-WATER DISPOSAL

被引：14

作者：

ONG, CG ^{[1
]}

TANJI, KK ^{[1
]}

DAHLGREN, RA ^{[1
]}

SMITH, GR ^{[1
]}

QUEK, AF ^{[1
]}

机构：

[1] UNIV CALIF DAVIS,DEPT LAND AIR & WATER RESOURCES,DAVIS,CA 95616

来源：

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY | 1995年 / 43卷 / 07期

关键词：

AGRICULTURAL WASTE WATER; EVAPOCONCENTRATION; EVAPORATION POND; WATER QUALITY;

D O I：

10.1021/jf00055a034

中图分类号：

S [农业科学];

学科分类号：

09 ;

摘要：

Evaporation ponds in California's San Joaquin Valley are an interim disposal solution for saline drainage waste water from irrigated agriculture. A water quality monitoring program was initiated to gauge the environmental fate of potential inorganic toxicants (As, B, Ma, and Se) upon evapoconcentration. Chemical composition is dominated by Na, Cl, and SO4, with electrical conductivities ranging from 8 to 34 dS/m in inflow and from 48 to 178 dS/m in pond waters. Trace element levels are largely determined by (1) geomorphic landscape position, (2) degree of evapoconcentration, and (3) chemical reactivity in the water column-sediment system. Cl-based evapoconcentration factors were calculated to evaluate trace element chemical reactivity. B was readily conserved, whereas As, Mo, and Se underwent loss from the water column. As, B, and Se approached or exceeded hazardous waste criteria. Continued operation within environmental standards requires careful management.

引用

页码：1941 / 1947

页数：7

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