CN-121978294-A - Online detection system and method for bisphenol A in water body

CN121978294ACN 121978294 ACN121978294 ACN 121978294ACN-121978294-A

Abstract

The invention relates to the technical field of water body detection analysis, in particular to an online detection system and an online detection method for bisphenol A in a water body, which aim at the characteristic that the chemical property of bisphenol A is obviously influenced by the pH of the water body, carry out online detection on the pH value of the current water body, determine the state of bisphenol A in the current water body, analyze the coupling association degree between the pH detection value of the water body and the ion duty ratio of bisphenol A if the state is the coexistence state of bisphenol A, distinguish whether the detection precision problem of online detection equipment or the bisphenol A concentration detection problem influenced by the pH of the water body is solved, and if the detection precision problem of the online detection equipment is solved, the parameter setting of the online detection equipment can be optimized pertinently, the detection precision of bisphenol A concentration in the water body by the online detection equipment is improved, and the online detection system can also be used as the reference data for predicting the state and the concentration change trend of bisphenol A, and the optimal opportunity for online detection of bisphenol A in the water body is predicted.

Inventors

ZHOU LI
CHEN CHENG
ZHANG WENTAO
XU BIN
XUE XIAOYU

Assignees

无锡芯宏彦智能科技有限公司

Dates

Publication Date: 20260505
Application Date: 20251223

Claims (10)

1. An on-line detection method of bisphenol a in a water body is characterized by comprising the following steps: Carrying out online detection on the pH value of the current water body to determine the bisphenol A state in the current water body; If the bisphenol A state in the current water body is a bisphenol A coexistence state, extracting a plurality of groups of historical water body online detection data in a historical pH online detection period, and analyzing the coupling association degree between the pH detection value of the water body and the bisphenol A ion duty ratio according to the plurality of groups of historical water body online detection data; the method comprises the steps of performing similar comparison on a water pH detection value change trend in a plurality of historical pH online detection periods and a water pH detection value change trend in the pH online detection periods, and screening a water pH prediction reference line; and determining a water pH prediction analysis line according to the water pH prediction reference line, performing prediction analysis on the water pH detection value change trend in the pH online detection period, and determining the online detection optimal period.
2. The method for on-line detection of bisphenol a in a body of water according to claim 1, wherein the determination of the bisphenol a status in the current body of water is as follows: setting a pH online detection period, dividing the pH online detection period into a plurality of pH online detection points, and respectively extracting a wastewater discharge inlet, a wastewater discharge midpoint and a wastewater discharge outlet of an industrial wastewater discharge working section to serve as an inlet space detection point, a midpoint space detection point and an outlet space detection point; Respectively acquiring the pH values of an inlet space detection point, a midpoint space detection point and an outlet space detection point at the pH online detection point and the corresponding water volume, and converting the H + concentration of each space detection point corresponding to the pH value at the pH online detection point to obtain the space H + concentration; Calculating the product of the space H + concentration of each space detection point corresponding to the pH online detection point and the corresponding water volume, then summing, and then carrying out inversion calculation on the H + concentration to obtain a water pH detection value; and if the pH detection value of the water body is in the preset pH range of the water body, displaying the water body as a bisphenol A coexistence signal.
3. The method for on-line detection of bisphenol A in a water body according to claim 2, wherein the analysis process of the coupling degree of the pH detection value of the water body and the bisphenol A ion ratio is as follows: substituting all the pH detection values of the water body into a two-dimensional coordinate system according to the time sequence corresponding to the historical pH online detection period, and constructing a historical water body pH change curve; Substituting all bisphenol A ion duty ratios into a two-dimensional coordinate system according to the time front-back sequence corresponding to the historical pH online detection period, and constructing a historical bisphenol A ion change curve; Extracting a peak coordinate point and a trough coordinate point on a historical water pH change curve, and taking a curve between adjacent peak coordinate points and trough coordinate points as a pH peak-valley analysis line to obtain a plurality of pH peak-valley analysis lines; Extracting a peak coordinate point and a trough coordinate point on a historical bisphenol A ion change curve, and taking a curve between adjacent peak coordinate points and trough coordinate points as a bisphenol A ion peak-valley analysis line to obtain a plurality of bisphenol A ion peak-valley analysis lines; sequencing a plurality of pH peak-valley analysis lines according to a time sequence, and respectively recording the pH peak-valley analysis lines as A1, A2, A3, A4 and A. Sequencing a plurality of bisphenol a ion peak-valley analysis lines according to a time sequence, and respectively recording as B1, B2, B3, B4, and..the term "Bm; The number of pH peak-valley analysis lines n is equal to the number of bisphenol a ion peak-valley analysis lines m, and An is represented as the nth pH peak-valley analysis line, and Bm is represented as the mth bisphenol a ion peak-valley analysis line.
4. The on-line detection method of bisphenol a in a water body according to claim 1, wherein the determination process of the coupling degree between the pH detection value of the water body and the bisphenol a ion ratio is as follows: extracting historical online detection points corresponding to the end point coordinates of the analysis line of the peak and the valley of the A1pH value, namely an A1pH starting time point and an A1pH ending time point, and historical online detection points corresponding to the end point coordinates of the analysis line of the peak and the valley of the B1 bisphenol A ion, namely a B1 ion starting time point and a B1 ion ending time point; Respectively obtaining the interval duration between the A1pH starting time point and the B1 ion starting time point and the interval duration between the A1pH ending time point and the B1 ion ending time point, taking the ratio of the historical pH on-line detection period duration as the unit starting interval ratio and the unit ending interval ratio, summing to obtain a unit aging interval value, and summing to perform average calculation to obtain an associated aging interval value; Respectively obtaining the distance between two end point coordinates of an A1pH peak-valley analysis line and the distance between two end point coordinates of a B1 bisphenol A ion peak-valley analysis line, taking the distance as a unit pH change value and a unit ion duty ratio change value, calculating a ratio to obtain a unit change analysis value, and then calculating a standard deviation to obtain a correlation degree change value; Summing the association aging interval value and the association degree change value to obtain a coupling association analysis value; And if the association degree change value is smaller than or equal to the association degree change threshold value, displaying the association degree change value as a coupling association tight signal.
5. The method for online detection of bisphenol A in a water body according to claim 1, wherein the process of comparing the trend of the change of the pH detection value of the water body in the plurality of historical pH online detection periods with the trend of the change of the pH detection value of the water body in the pH online detection period is as follows: Substituting the pH detection value of the water body into a two-dimensional coordinate system according to the acquired time sequence and the acquired time sequence in the pH online detection period, constructing a current pH change curve of the water body, taking an endpoint coordinate on the current pH change curve of the water body as a historical pH change curve of the water body to intercept an endpoint coordinate, and intercepting a local historical pH change curve of the water body as a water pH to-be-referenced line; Taking a local curve between two adjacent coordinates on a pH to-be-referenced line of the water body as a pH to-be-referenced sub-line; taking a local curve between two adjacent coordinates on the current water pH change curve as a current pH sub-line; Respectively acquiring the slope of the first pH sub-line to be referred and the slope of the first current pH sub-line, performing difference, and taking the absolute value to obtain a sub-line trend comparison value; and carrying out summation average value calculation on all the sub-line trend comparison values to obtain a trend similarity comparison value.
6. The method for online detection of bisphenol A in a water body according to claim 5, wherein the process of comparing the trend of the change of the pH detection value of the water body in the plurality of historical pH online detection periods with the trend of the change of the pH detection value of the water body in the pH online detection period is as follows: placing a water pH to-be-referenced line and a current water pH change curve in a two-dimensional coordinate system, and constructing a similar comparison coordinate model; extracting a first coordinate point on a water pH to-be-referenced line and a first coordinate point on a current water pH change curve in a similarity comparison coordinate model, calculating by using a coordinate distance calculation formula, and calculating the ratio with the length of the current water pH change curve to obtain a single point degree comparison value; and carrying out summation average value calculation on all the single-point degree comparison values to obtain the degree similarity comparison value.
7. The method for on-line detection of bisphenol a in a body of water according to claim 6, wherein the determination of the pH prediction reference line of the body of water is as follows: summing the trend similarity comparison value and the degree similarity comparison value to obtain a similarity comparison analysis value; And comparing the similarity comparison analysis values corresponding to all the historical pH online detection periods, and selecting a historical water pH change curve corresponding to a water pH to-be-referenced line of the minimum similarity comparison analysis value as a water pH prediction reference line.
8. The method for on-line detection of bisphenol a in a water body according to claim 1, wherein the determination process of the water body pH prediction analysis line is as follows: And determining a water pH prediction analysis line by taking the end point coordinate on the current water pH change curve as the initial interception coordinate of the water pH prediction reference line and taking the original termination coordinate of the water pH prediction reference line as the termination interception coordinate of the water pH prediction reference line.
9. The method for on-line detection of bisphenol a in a body of water according to claim 8, wherein the determination of the optimal period of on-line detection is as follows: Marking the minimum value of a preset water pH interval on a water pH prediction analysis line, and making an optimal pH detection line parallel to an X axis; and extracting a coordinate point of which the Y-axis coordinate is under the optimal pH detection line on the water pH prediction analysis line, and combining X-coordinate points of which the Y-axis coordinate is under the optimal pH detection line and the time is continuous on the water pH prediction analysis line to be used as an optimal period of on-line detection.
10. An on-line bisphenol a detection system in a body of water, comprising: The state evaluation module is used for carrying out online detection on the pH value of the current water body and determining the bisphenol A state in the current water body; The coupling analysis module is used for extracting a plurality of groups of historical water body online detection data in the historical pH online detection period if the bisphenol A state in the current water body is the bisphenol A coexistence state, and analyzing the coupling association degree between the pH detection value of the water body and the bisphenol A ion duty ratio according to the plurality of groups of historical water body online detection data; the screening reference module is used for carrying out similar comparison on the change trend of the pH detection value of the water body in the plurality of historical pH online detection periods and the change trend of the pH detection value of the water body in the pH online detection periods, and screening out a water body pH prediction reference line; And the reference prediction module is used for determining a water pH prediction analysis line according to the water pH prediction reference line, predicting and analyzing the variation trend of the water pH detection value in the pH online detection period, and determining the online detection optimal period.

Description

Online detection system and method for bisphenol A in water body Technical Field The invention relates to the technical field of water body detection and analysis, in particular to an online detection system and method for bisphenol A in a water body. Background With the rapid development of industrialization, bisphenol a (BPA) is widely used as an important industrial raw material in the fields of plastic products, food packaging, medical instruments, and the like. However, bisphenol A easily enters the water environment through the ways of waste water discharge and the like in the production and use processes, and forms a potential threat to the ecological system and human health. Bisphenol a has endocrine disruptors and even low concentration exposure may trigger a range of biological effects such as reproductive toxicity, neurotoxicity, carcinogenicity, etc. Therefore, the real-time and accurate online detection of the concentration of bisphenol A in the water body becomes one of the key tasks in the fields of environmental monitoring and pollution control. The chemical property of bisphenol A is obviously influenced by the pH of a water body, namely, under the condition of extreme pH, the bisphenol A can be hydrolyzed, adsorbed or transformed in morphology, so that the ion duty ratio is changed, and the stability and accuracy of a detection signal are seriously influenced, for example, when the intelligent sensor with a built-in pH sensor module detects that the pH of the water body is close to 10, the bisphenol A can exist in an ion form, the electrochemical response or fluorescent signal of the bisphenol A can be obviously weakened, so that the detection value deviates from the actual concentration, and under the condition of neutral or weak acid/alkaline, the molecular form of the bisphenol A is more stable, and the reliability of the detection signal is higher. The pH values of different discharge periods of the same water body can fluctuate, and the pH values of different discharge water bodies can be obviously different. The existing online detection system mostly adopts a strategy of sampling at fixed time intervals, and the influence of dynamic fluctuation of the pH of the water body on the detection precision is not fully considered. In the pH unfavorable interval, frequent detection may result in invalid data or increased error due to bisphenol A state change, not only wasting detection resources, but also covering up real pollution trend, and in the pH favorable interval, the insufficient detection frequency may miss key concentration change information, reducing monitoring timeliness. Therefore, how to dynamically adjust the detection strategy according to the real-time change of the pH of the water body becomes a core problem for improving the online detection precision and efficiency of bisphenol A. Therefore, the invention provides an online detection system and method for bisphenol A in a water body. Disclosure of Invention Aiming at the defects of the prior art, the invention provides an online detection system for bisphenol A in a water body and a detection method based on the detection system, so as to effectively improve the online detection precision and efficiency of bisphenol A. The technical scheme adopted for solving the technical problems is as follows: in one aspect, the invention provides an on-line detection method of bisphenol A in a water body, comprising the following steps: Carrying out online detection on the pH value of the current water body to determine the bisphenol A state in the current water body; If the bisphenol A state in the current water body is a bisphenol A coexistence state, extracting a plurality of groups of historical water body online detection data in a historical pH online detection period, and analyzing the coupling association degree between the pH detection value of the water body and the bisphenol A ion duty ratio according to the plurality of groups of historical water body online detection data; the method comprises the steps of performing similar comparison on a water pH detection value change trend in a plurality of historical pH online detection periods and a water pH detection value change trend in the pH online detection periods, and screening a water pH prediction reference line; and determining a water pH prediction analysis line according to the water pH prediction reference line, performing prediction analysis on the water pH detection value change trend in the pH online detection period, and determining the online detection optimal period. In a further scheme of the invention, the determination process of the bisphenol A state in the current water body is as follows: setting a pH online detection period, dividing the pH online detection period into a plurality of pH online detection points, and respectively extracting a wastewater discharge inlet, a wastewater discharge midpoint and a wastewater discharge outlet of an industrial was